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Inspection check list of CNS & ATM facilities ver 4.2 21/07/10 (Signature of station in charge) of 99

DIRECTOR GENERAL OF CIVIL AVIATION

DIRECTORATE OF AS & ANS

Inspection checklist for CNS and ATM facilities:

NAME OF AIRPORT

PERIOD FOR INSPECTION

DATE

NAME DESIGNATION PERIOD

STATION INCHARGES DURING THE PERIOD

UNIT NAME DESIGNATION

1. VHF /VCCS/ RECORDER/

TIME SIGNAL

DISTRIBUTION

2. VOR/DME/NDB

UNIT

INCHARGES

3. ILS

S. NO. FACILITIES INSTALLED

1. VHF

2. RECORDER

3. TIMING SIGNAL DISTRIBUTION

4. CNS FACILITY STATUS INDICATOR

5. NDB

6. VOR/DME

7. ILS

NAME STAUS CALIBRATION

VALID UP TO

1.

2.

3.

TEST EQPTS

REQUIRED FOR

PERFORMANCE

CHECK AND

MAINTENANCE

OF ABOVE

FACILITIES

4.



NAME OF THE SITE: CVOR/DVOR


FACILITY INSPECTED VOR & DME

MAKE OF THE EQUIPMENT

MODEL OF THE EQUIPMENT


FACILITY INSPECTION

1


. Equipment History

No. Aspects CAR

Reference

Compliance

Status

Remarks

A

B

Age

What is the prescribed life of the equipment as per manufacturer?

i. Year of manufacture/ procurement?

ii. Year of installation/ commissioning

iii. What is the service life in years till now?

iv. If it has out lived then what is the action plan for replacement/ continuation?

Major changes since last inspection

i. Has there been any major site related change

since last inspection which might have an

impact on the normal functioning of the facility?

ii. If yes, then has its impact been studied and

analysed?

iii. What steps have been taken to mitigate the


impact.

2


. Equipment Performance

The compliance status of the CARs associated with performance of VOR/DME may please be given in the format as given below.

Facility General Status

i. Are both channels working normal?

ii. If not then give reasons for un-serviceability

and action plan for restoration.

iii. Are the remote control systems for both the

channel functioning normally?

iv. If not then give action plan for restoration.

v. Are the facility status indicators at tower and

equipment room for both the channels working

normal?

Flight / Ground checks

i. When was the last ground check

done?(enclose last report)

ii. When was the last flight check done? (enclose

last report)


CAR compliance status for DVOR S no. Parameter CAR

ReferenceReference value/ tolerance Value Compliance

Status Remarks

1. Radio Frequency 3.3.2 ±0.002%

2. Deviation 3.3.3.1 ±2.0°

3. Alignment with

neighboring stations

3.3.2.1 ±2.0°

4. i. Accuracy

ii. Polarization

iii. Alignment

iv. Bends

v. Roughness and

scalloping

vi. Flyability

3.3.3.2 ±2.0°

±2.0°

±2.0°

±3.5°

±3.0°

Flyable

5. Coverage 3.3.4.1 Up to required distance and to an

elevation angle of 400


S no. Parameter CAR Reference

Reference value/ tolerance Value Compliance Status

Remarks

6. Field strength 3.3.4.2 90 μV/m

7. 9 960 Hz deviation 3.3.5.1 16+1

8. 9 960 Hz modulation

depth

3.3.5.2 28% to 32%

9. 30 Hz modulation

depth

3.3.5.3 28% to 32%

10. 30 Hz modulation

frequency

3.3.5.4 30 Hz +1%

11. 9 960 Hz subcarrier

frequency

3.3.5.5 9960 Hz+1%

12. Amp. Mod. Of 9 960

Hz subcarrier

frequency

3.3.5.6 < 5%

13. Sideband level of

harmonics of 9 960 Hz

3.3.5.7 2nd Harmonics -30 dB

3rd Harmonics -50 dB

4th Harmonics -60 dB


S no. Parameter CAR Reference

Reference value/ tolerance Value Compliance Status

Remarks

14. Identification speed 3.3.6.5 7 words per minute

15. Identification repetition 3.3.6.5 > once every 30 sec.

16. Identification tone

frequency

3.3.6.5 1020 Hz+50 Hz

17. Identification modulation depth with no communications channel

3.3.6.6 < 20%

18. Bearing monitor 3.3.7.1 Radiation should cease if a change in

excess of 10 monitored

19. Modulation monitor 3.3.7.1 Radiation should cease if reduction of

15% of modulation is monitored for

either subcarrier of 30 Hz or both

20. Failure of monitor

3.3.7.2 By removing the ident and navigations component

or Cause radiation to cease.


CAR compliance status for DME (HP/LP)

S no. Parameter CAR

Reference

Reference value/ tolerance Value Compliance

Status

Remarks

1. Transmitter

- Frequency stability - Pulse spectrum - Pulse shape

- Pulse spacing - Peak power output - Peak variation

- Pulse repetition

frequency

3.5.4.1.2

3.5.4.1.3

3.5.4.1.3

3.5.4.1.4

3.5.4.1.5

3.5.4.1.5.4

3.5.4.1.5.6

+0.002%

+ 2MHz of central frequency

Rise time <3µS,Duration

3.5+0.5µS,Decay time< 3.5µS

nominal 2.5µS

12-6sec.+0.25-6sec

>-89dBW/m2

Any pair of pulses shall not differ by

more than 1 dB.

Minimum 700 PP/Sec to Maximum

2700 +90 PP/Sec


S no. Parameter CAR

Reference


Status

Remarks

2. Receiver

- Frequency stability - Sensitivity - Sensitivity variation

with load - - Bandwidth

3.5.4.2.2

3.5.4.2.3.1

3.5.4.2.6

3.5.4.2.3.5

+0.002%

-103dBW/m2

≤3dB for +100KHz drift in

interrogation frequency

< 1dB for transponder loading of 0 to

90% of maximum transmission rate.

3. Decoder 3.5.4.3 No response to interrogations with pulse spacing more than 2 μs from nominal

4. Time delay 3.5.4.4 X-channel: 50 μs

5. Identification 3.5.3.6 1 350 pulse pairs during key down periods proper Morse code sequence dot length = 0.1 to 0.16 s; dash = 0.3 to 0.48 s; spacing between dot and dash = dot length ±10%; spacing between letters <3 dots 10 μs total length of one code sequence <10 seconds


S no. Parameter CAR

Reference


Status

Remarks

6. Monitor action 3.5.4.7.2.2 Monitor alarms when: Reply delay varies by more than 1 μs (0.5 μs for DME associated with a landing aid)

7. Monitor action delay 3.5.4.7.2.5 Delay <10 seconds

8. Coverage 3.5.3.1.2

/3.5.4.1.5.2

Signal strength such that field density >-89 dBW/m2 at limits or operational requirements

9. Accuracy 3.5.4.5 <150 m

<75 m for DME associated with

landing aids

10. Pulse shape 3.5.4.1.3 Rise time <3 μs Duration 3.5 μs, ±0.5 μs Decay time <3.5 μs Instant amplitude, between 95% rise/fall edge, should not fall below 95% of maximum amplitude

11. Pulse spacing 3.5.4.1.4 X channel: 12 ±0.25 μs

12. Identification 3.5.3.6 Correct, clear, properly

synchronized


S no. Parameter CAR

Reference


Status

Remarks

13. Reply efficiency 3.5.4.6.1 Note areas where this changes

significantly

14. Unlocks 3.3.15

(Doc 8071)

Note where unlocking occurs

15. Standby equipment 3.3.16

(Doc 8071)

Same as primary transmitter

16. Standby power 3.3.17

(Doc 8071)

Should not affect transponder

parameters

3


. Equipment Failure analysis

A.

B.

DVOR

i. List all the NOTAMs related to the facility since last

inspection.

ii. What is the total duration, total numbers of failures and

their causes in the last one year? (prepare a chart as per

format given in annex)

iii. What is the MTBF for each channel?

iv. What is the MTTR for faults?

DME

v. List all the NOTAMs related to the facility since last

inspection.

vi. What is the total duration, total numbers of failures and



vii. What is the MTBF for each channel?

viii. What is the MTTR for faults?


4. Equipment Maintenance & Spares


Are all the maintenance activities being performed in the unit and

duly being recorded?

Preventive

a. Daily recording of essential parameters and meter

readings.

b. Weekly as per approved schedules.

c. Monthly as per approved schedules.

d. Six monthly as per schedule.

e. Maintenance of Fault log book.

2. Is there any parameter out of tolerance for which remedial

action is yet to be taken?

3. If yes then indicate the parameter and mitigation plan?

Corrective

4. Is the manufacturer or indigenous backup support available

for fault isolation and rectification?

5. If not then what is the contingency plan in case of failure?


Spares

6. Have the critical spares been identified?

7. Are they available (on site or depot)?

Note : If any of the above activity not required as per

manufacturer recommendation and AAI approval, the same may

be notified and concurrence of DGCA may be obtained


5. Equipment Manuals & Documents


A. Schedules

i. Are these preventive schedules as approved by DGCA

available?

a. Daily schedule

b. Weekly schedule

c. Monthly schedule

d. Six monthly schedule

e. Yearly schedule

B. Log books

i. Are the following Log books available?

a. Fault log book

b. Equipment history book

c. Shift duty log book

d. General duty log book


C. Manuals

i. Are the following manuals as supplied by manufacturer

available?

a. Are all the volumes of technical manuals available?

b. Are all the volumes of operational manuals

available?

D. ICAO Documents/DGCA CARs/CNS Manuals

i. Are these ICAO documents/ DGCA CARs available?

a. Annex- 10

b. CARs

c. Doc 8071

d. CNS manual

Note: Manuals and documents should be made available at the time of inspection


6. Human resource:

A. Adequacy

i. What is the manpower requirement, for maintenance and operation of the facility, as per approved norms?

ii. Is the same available?

iii. If not, what is the mitigation plan

B. Training & Proficiency

i. Is the staff deployed, for the operation and maintenance of

the facility, proficient on this type of equipment?

ii. Have they undergone refresher training & OJT before

deployment?


DVOR - SITE INSPECTION

No. Aspects CAR

Reference

Compliance

Status

Remarks

1. Civil

Building

i. Is the approach to the building clear of grass

and other vegetation?

ii. Is the equipment building in good condition

(check for breakage, leakage etc)?

iii. Is the building properly painted as per standard

design pattern?


Ambience

i. Is the equipment room meeting the

environmental conditions for satisfactory

equipment performance?

a. Temperature

b. Humidity c. Dust-proof (check for window pane

breakage, space between the door frames

and doors)?

Frangible huts

i. In case the building is a frangible hut :

a. Is building properly sealed from all sides to

prevent entry of any reptile such as rats,

snakes etc.?

b. Is the thermal insulation in walls and roof

sufficient to meet the temperature

requirement of the equipment?


2. Electrical

Earthing

i. Is the earthing of the electrical installations ok?

a. What is the resistance of the system?

b. Name the standard being followed.

ii. Is the earthing of the equipment ok?



Lighting protection

iii. Is the lightening protection system working

normal?

a. Name the type

b. If multi-strike type give the count

Surge protection

iv. Is the surge protection system working


normal?

a. Name the type and give operational

range.

Power Supply

v. Is the power supply available meets the

standard (voltage, frequency)?

vi. Which power back up system (Generator,

UPS, and Battery) available?

vii. AMF panel is manual or automatic?

a. Mention the switchover time.

viii. What is the back-up period

a. UPS

b. Batteries

Cooling

ix. Are the number of a/c sufficient to maintain the

temperature required for the equipment


a. Is their preventive maintenance being

done as per schedule?

b. When was the last preventive

maintenance done?

3. Fire protection

1. Are the fire extinguishers working

normal

2. Mention type of extinguisher used

3. Are they suitably placed for easy

approach?

4. Are they tested for functionality as per

schedule?

5. When they were last tested?


NAME OF THE SITE: ILS - LOCALIZER

FACILITY LLZ




FACILITY INSPECTION

1. Equipment History No. Aspects CAR

Reference

Compliance

Status

Remarks

A

B

Age


i. Year of manufacture/ procurement? ii. Year of installation/ commissioning iii. What is the service life in years till now? iv. If it has out lived then what is the action plan

for replacement/ continuation?


i. Has there been any major site related change since last inspection which might have an impact on the normal functioning of the facility?

i. If yes, then has its impact been studied and analysed?

ii. What steps have been taken to mitigate the impact.

2





ii. If not then give reasons for un-serviceability


iii. Are the remote control systems for both the



v. Are the facility status indicators at tower and


normal?


vi. When was the last ground check


vii. When was the last flight check done? (enclose last report)

The compliance status of the CARs associated with performance of ILS may please be given in the format as given below.


CAR Compliance status for ILS (LLZ)

S no. Parameter CAR

Reference


Status

Remarks

1. Frequency 3.1.3.2.1 Frequency single: 0.005% Dual: 0.002%

Separation: >5 kHz <14 kHz.

2. Spurious modulation 3.1.3.2.3 <0.005 DDM peak-to-peak

3. Coverage (usable

distance)

3.1.3.3.1 As set at commissioning

4. Field strength 3.1.3.3.2 CAT – I : >-107dBW/m2 at 10 NM

to threshold

CAT- II: >-106dBW/m2 at 10 NM to

-100dBW/m2 at threshold

CAT – III: >-106dBW/m2 at 10 NM

to -100dBW/m2 at threshold and

along the length of the runway in

the direction of the LLz


5. Course structure 3.1.3.4 As described in Annex 10.

6. Carrier modulation - Balance - Depth

3.1.3.5.1 Within 10 μA of the modulation

balance value.

18-22%

7. Carrier modulation

frequency

3.1.3.5.3 Cat I: ±2.5% Cat II: ±1.5% Cat III: ±1%


harmonic content (90 Hz)

3.1.3.5.3 d) <10%

<5% (Cat III)


harmonic content (150

Hz)

3.1.3.5.3 e) <10%

<5% (Cat III)

10. Phasing of alternative

systems

3.1.3.5.3.5 Cat I, II, nominal: ±20° Cat III nominal: ±10°

11. Sum of modulation

depths

3.1.3.5.3.6 Modulation depth <95%

12. Course alignment 3.1.3.6 Cat I: <10.5 m. Cat II: <7.5 m Cat III: < 3 m


13. Displacement sensitivity 3.1.3.7 0.00145 Nominal. See Note 2. Cat I, II: ±17% Cat III: ±10%

14. Peak modulation depth 3.1.3.8.3.2 <50%

15. Audio frequency

characteristic

3.1.3.8.3.3 ±3dB

16. Identification tone

frequency

3.1.3.9.2 1 020 ±50 Hz

17. Identification modulation

depth

3.1.3.9.2 As commissioned.

18. Identification repetition

rate

3.1.3.9.4 As commissioned.

19. Phase modulation 3.1.3.5.4 Limits given in FM Hz/PM radians 90 Hz 150 Hz (Difference Hz) Cat I: 135/1.5 135/0.9 45 Cat II: 60/0.66 60/0.4 20 Cat III: 45/0.5 45/0.3 15


20. Monitoring

- Course shift

- Change in

displacement

sensitivity

- Clearance signal

3.1.3.11.2

3.1.3.11.2.f

3.1.3.11.2.1

Monitor must alarm for a shift in the main course line from the runway centre line equivalent to or more than the following distances at the ILS reference datum. Cat I: 10.5 m (35 ft) Cat II: 7.5 m (25 ft) Cat III: 6.0 m (20 ft) Monitor must alarm for a change in displacement sensitivity to a value differing from the nominal value by more than: Cat I: 17% Cat II: 17% Cat III: 17% Monitor must alarm when the off-course clearance cross-pointer deflection falls below 150 μA anywhere in the off-course coverage area.


- Reduction in power

- Total time, out-of-

tolerance radiation

3.1.3.11.2 d) and e) 3.1.3.11.3

Monitor must alarm either for a power reduction of 3 dB, or when the coverage falls below the requirement for the facility, whichever is the smaller change. For two-frequency localizers, the monitor must alarm for a change of ±1dB in either carrier, unless tests have proved that use of the wider Limits above will not cause unacceptable signal degradation (>150 μa in clearance sector). Cat I: 10 s Cat II:5 s Cat III: 2 s

3


. Equipment Failure analysis

A.

LLZ


inspection.









Preventive


readings.



d. Six monthly as per schedule.


ii. Is there any parameter out of tolerance for which remedial

action is yet to be taken?

iii. If yes then indicate the parameter and mitigation plan?

Corrective

iv. Is the manufacturer or indigenous backup support

available for fault isolation and rectification?

v. If not then what is the contingency plan in case of failure?


Spares

vi. Have the critical spares been identified?

vii. Are they available (on site or depot?





A. Schedules


available?

a. Daily schedule

b. Weekly schedule

c. Monthly schedule


e. Yearly schedule

B. Log books


a. Fault log book





C. Manuals


available?



available?



a. Annex- 10

b. CARs

c. Doc 8071

d. CNS manual



6. Human resource:

A. Adequacy








deployment?


LLZ SITE INSPECTION No. Aspects CAR

Reference

Compliance Status Remarks

1. Civil

Building i. Is the approach to the building clear of grass


ii. Is the equipment building in good condition (check for breakage, leakage etc)?

iii. Is the building properly painted as per standard design pattern?

Ambience

i. Is the equipment room meeting the environmental conditions for satisfactory equipment performance? a. Temperature

b. Humidity

c. Dust-proof (check for window pane



and doors)?

Frangible huts

ii. In case the building is a frangible hut :



snakes etc.?





2. Electrical

Earthing

i. Is the earthing of the electrical installations

ok?






Lighting protection


normal?

a. Name the type



Surge protection


normal?


range.

Power Supply








a. UPS

b. Batteries

Cooling

ix. Are the number of a/c sufficient to maintain


the temperature required for the equipment




maintenance done?

3. Fire protection

i. Are the fire extinguishers working

normal

ii. Mention type of extinguisher used

iii. Are they suitably placed for easy

approach?

iv. Are they tested for functionality as per

schedule?

v. When they were last tested?


NAME OF THE SITE: ILS - GLIDEPATH

FACILITY GLIDEPATH




FACILITY INSPECTION

1. Equipment History

No. Aspects CAR

Reference

Compliance

Status

Remarks

1. Age

i. What is the prescribed life of the equipment as per manufacturer?

ii. Year of manufacture/ procurement?

iii. Year of installation/ commissioning

iv. What is the service life in years till now?

v. If it has out lived then what is the action plan for replacement/ continuation?

Major changes since last inspection Has there been any major site related change since last inspection which might have an impact on the normal functioning of the facility? vi. If yes, then has its impact been studied and

analysed? vii. What steps have been taken to mitigate the

impact.

2



No. Aspects CAR

Reference

Compliance

Status

Remarks



ii. If not then give reasons for un-serviceability and action plan for restoration.

iii. Are the remote control systems for both the channel functioning normally?


v. Are the facility status indicators at tower and equipment room for both the channels working normal?


vi. When was the last ground check done?(enclose last report)

vii. When was the last flight check done? (enclose last report)

The compliance status of the CARs associated with performance of ILS may please be given in the format as given below.


CAR Compliance for ILS (GP)

S no. Parameter CAR

Reference


Status

Remarks

1. Path angle 3.1.5.1.2.2 Cat I: Within 7.5% of nominal angle Cat II: Within 7.5% of nominal angle Cat III: Within 4% of nominal angle

2. Frequency 3.1.5.2.1 Single 0.005% Dual 0.002% Separation >4 kHz, <32 kHz

3. Unwanted modulation 3.1.5.2.3 ±0.02 DDM peak-to-peak

4. Coverage (usable

distance) 3.1.5.3 As commissioned.

5. Carrier modulation - Balance - Depth

3.1.5.5.1 0.002 DDM 37.5% to 42.5% for each tone


frequency 3.1.5.5.2

a), b), and c)

Cat I: 2.5% Cat II: 1.5% Cat III: 1%

7. Carrier modulation harmonic content (90 Hz)

3.1.5.5.2

d) <10% <5% (Cat III)


8. Carrier modulation harmonic content (150 Hz)

3.1.5.5.2

e) <10% < 5% (Cat III)

9. Unwanted amplitude modulation

3.1.5.5.2.2 <1%

10. Phase of modulation tones

3.1.5.5.3 Cat I, II: <20° Cat III: <10°

11. Phase of modulation tones, dual frequency systems (each carrier and between carriers)

3.1.5.5.3.1

Cat I, II: <20° Cat III: <10°

12. Phase of modulation tones,

alternative systems

3.1.5.5.3.2 Cat I, II: Nominal ± 20° Cat III: Nominal ± 10°

13. Displacement sensitivity 3.1.5.6 Refer to CAR, Sec. 4 Series D Part-II, 3.1.5.6

14. Monitoring

- Path angle

3.1.5.7.1

a)

Monitor must alarm for a change in angle of 7.5% of the promulgated angle.

- Change in

displacement

3.1.5.7.1

d), e) Cat I: Monitor must alarm for a change in the angle between the glide path and the line below the


sensitivity glide path at which 75 μA is obtained, by more than 3.75% of path angle. Cat II: Monitor must alarm for a change in displacement sensitivity by more than 25%. Cat III: Monitor must alarm for a change in displacement sensitivity by more than 25%.

- Reduction in power 3.1.5.7.1

b), c) Monitor must alarm either for a power reduction of 3 dB, or when the coverage falls below the requirement for the facility, whichever is the smaller change.

- Clearance signal 3.1.5.7.1

g) Monitor must alarm for DDM <0.175 below path clearance area

- Total time of out-of-tolerance radiation

3.1.5.7.3.1 Cat I: 6 s Cat II, III:2 s

- Monitor System

Failure

3.1.5.7.4 Monitor system should be consistent with the requirement that the radiation shall cease and warning shall be provided at the designated remote control point in the event of failure of the monitor system itself


3. Equipment Failure analysis

A.

Glide Path


inspection.

ii. What is the total duration,total numbers of failures and








Preventive

f. Daily recording of essential parameters and meter

readings.

g. Weekly as per approved schedules.

h. Monthly as per approved schedules.

i. Six monthly as per schedule.

j. Maintenance of Fault log book.


action is yet to be taken.


Corrective

iv. Is the manufacturer or indigenous backup support




Spares







A. Schedules


available?

a. Daily schedule

b. Weekly schedule

c. Monthly schedule


e. Yearly schedule

B. Log books


a. Fault log book





C. Manuals


available?



available?



a. Annex- 10

b. CARs

c. Doc 8071

d. CNS manual



6. Human resource:

A. Adequacy








deployment?


GP SITE INSPECTION No. Aspects CAR

Reference


1. Civil





Ambience


b. Humidity




and doors)?

Frangible huts




snakes etc.?





2. Electrical

Earthing


ok?






Lighting protection


normal?

a. Name the type



Surge protection


normal?


range.

Power Supply








a. UPS

b. Batteries

Cooling

ix. Are the number of a/c sufficient to maintain






maintenance done?

3. Fire protection

vi. Are the fire extinguishers working

normal

vii. Mention type of extinguisher used

viii. Are they suitably placed for easy

approach?

ix. Are they tested for functionality as per

schedule?

x. When they were last tested?


NAME OF THE SITE: NDB

FACILITY INSPECTED NDB




FACILITY INSPECTION

4. Equipment History

No. Aspects CAR

Reference

Compliance

Status

Remarks

A

B

Age


v. Year of manufacture/ procurement?

vi. Year of installation/ commissioning

vii. What is the service life in years till now?

viii. If it has out lived then what is the action plan for replacement/ continuation?


iv. Has there been any major site related change since last inspection which might have an impact on the normal functioning of the facility?

v. If yes, then has its impact been studied and analysed? vi. What steps have been taken to mitigate the impact.

5



The compliance status of the CARs associated with performance of VOR/DME may please be given in the format as given below.


vi. Are both channels working normal?

vii. If not then give reasons for un-serviceability


viii. Are the remote control systems for both the


ix. If not then give action plan for restoration.

x. Are the facility status indicators at tower and


normal?


iii. When was the last ground check


iv. When was the last flight check done? (enclose

last report)


CAR compliance status for NDB

Measured Value S no. Parameter CAR/Annex.

10 Reference

Nominal tolerance

TX- 1 TX-2

Compliance

Status

Remarks

1. Carrier Frequency 3.4.4.2 ±0.01% (+0.005% for

power > 200 W at

frequencies

above1606.5 kHz)

2. Modulation depth 3.4.6.2 ±85% to 95%

3. Modulation frequency 3.4.5.4 1020 Hz+50 Hz

400Hz+25 Hz

4. Modulation depth of

power supply frequency

components

3.4.6.5 Less than 5% modulation depth

5. Carrier level change

during the modulation

3.4.6.4 < 0.5 dB If coverage is

<50 NM , <1.5dB If

coverage is >50 NM


6. Identification 3.4.5.1,

3.4.5.3

Approx. 7 words

/minute

7. Monitoring system

a) Antenna current or

field strength

3.4.8.1a

Alarm for 3dB decrease

8. b) Failure of

identification

3.4.8.1b Alarm for loss of or

continuous modulation

9. c) Malfunctioning of

monitor itself

3.4.8.1c Alarm for malfunction of

monitor

10. Rated coverage 3.4.2.1 >70µV/meter

11. Antenna Current Doc. 8071

(5.2.4)

<+30% of the value set

at the time of

commissioning

12. Audio distortion Doc. 8071

(5.2.10)

10% of distortion

Maximum


NDB SITE INSPECTION

No. Aspects CAR

Reference

Compliance

Status

Remarks

1. Civil

Building

iv. Is the approach to the building clear of grass


v. Is the equipment building in good condition

(check for breakage, leakage etc)?

vi. Is the building properly painted as per standard

design pattern?

Ambience

ii. Is the equipment room meeting the

environmental conditions for satisfactory

equipment performance?


a. Temperature

b. Humidity c. Dust-proof (check for window pane


and doors)?

Frangible huts




snakes etc.?




2. Electrical

Earthing

x. Is the earthing of the electrical installations ok?



xi. Is the earthing of the equipment ok?




Lighting protection

xii. Is the lightening protection system working

normal?

c. Name the type

d. If multi-strike type give the count

Surge protection

xiii. Is the surge protection system working

normal?

b. Name the type and give operational

range.

Power Supply

xiv. Is the power supply available meets the


standard ( voltage, frequency)?

xv. Which power back up system (Generator,


xvi. AMF panel is manual or automatic?


xvii. What is the back-up period

a. UPS

b. Batteries

Cooling

xviii. Are the number of a/c sufficient to maintain the

temperature required for the equipment

c. Is their preventive maintenance being


d. When was the last preventive

maintenance done?


3. Fire protection

6. Are the fire extinguishers working

normal

7. Mention type of extinguisher used

8. Are they suitably placed for easy

approach?

9. Are they tested for functionality as per

schedule?

10. When were they last tested?


NAME OF THE SITE: EQUIPMENT ROOM / TOWER

FACILITY INSPECTED – VHF and Equipment room Facilities

NAME MAKE MODEL VHF DATIS RECORDER

TIME SIGNAL

GENERATION &

DISTRIBUTION.

FACILITIES

RCAG


FACILITY INSPECTION

I. Equipment History

Age VHF

RECORDER TIME SIGNAL

DATIS RCAG

i. What is the prescribed life of the equipment as per

manufacturer?

ii. Year of manufacture/ procurement?

iii. Year of installation/ commissioning

iv. What is the service life in years till now?

A.

v. If it has out lived then what is the action plan for

replacement/ continuation?

II



Status of VHF channels

i. Are both main and standby Tx/Rx of all channels working

normal?

ii. If not then give reasons for un-serviceability and action

plan for restoration.

iii. Are the changeover systems from main to standby Tx/Rx

for all channels functioning normally?


i. What is the general range of the VHF Tx/Rx as checked by

aircrafts?

ii. Are the ranges of the VHF Tx/Rx satisfactory as per

users?

iii. If not, what is the mitigation plan?

iv. Is the coverage area of the VHF communication

satisfactory as per the users?

v. If not, then what is the mitigation plan?

vi. Enclose performance check report.


vii. What is the minimum separation between the antennas

required to prevent interference?

v. Is there any non compliance with respect to CARs for VHF

communication?

vi. Are there any interference in any of the channels?

a. If yes then mention the channels having

interference and what steps are being taken to stop

interference?

Status of VOR, DME, ILS Remote Monitoring and Control System

i. Are the RMCS working normal?

a. If no then give reasons and the restoration plans.

ii. Are there spare telephone lines available for RMCS?

a. From site to Equipment. Room.

b. From Equipment Room to tower?

Status of DATIS

i. Is the DATIS system working normal?


a. If not give reasons b. What is the restoration plan?

Status of Recorder

viii. Is the Recorder equipment functioning normally?

ix. If no give reasons and restoration plan.

x. If yes

- Are both main and standby available?

- Are all the required facilities being recorded?

- Is the play back noise free?

- Are all indications and controls working fine?

- Are all inputs and outputs labeled properly?

- Are spare lines available between facilities and recorder?

I


II. Equipments Failure analysis

VHF

RECORDER TIME

SIGNAL

DATIS DVTR


inspection




iii. What is the MTBF for each communication channel?


IV.


Equipment Maintenance & Spares


DVTR RECORDER TIME

SIGNAL DATIS VHF

A.

B.

C.

Are all the maintenance activities being performed in the

unit and duly being recorded?

Preventive


readings.



d. Six monthly as per approved schedule.



action is yet to be taken.


Corrective

iv. Is the manufacturer’s or indigenous backup support




Spares



Note: If any of the above activity not required as per

manufacturer’s recommendation and AAI approval, the same

may be notified and concurrence of DGCA may be obtained.

V.


Equipment Manual & Documents


A. Schedules


available?

a. Daily schedule

b. Weekly schedule

c. Monthly schedule


e. Yearly schedule

B. Manuals


available?



available?


C. ICAO Documents/DGCA CARs/CNS Manuals


a. Annex- 10

b. CARs

c. Doc 8071

d. CNS manual

D. Log books


a. Fault log book




V


I. Human resource:

A. Adequacy

i. What is the manpower requirement, for maintenance and

operation of the facility, as per approved norms?







deployment?

Note: Where ever required please attach separate sheets for presenting the data


EQUIPMENT ROOM / TOWER SITE INSPECTION No. Aspects CAR

Reference


1. Civil





Ambience


b. Humidity




and doors)?

Frangible huts




snakes etc.?





2. Electrical

Earthing


ok?






Lighting protection

i. Is the lightening protection system working

normal?

c. Name the type

d. If multi-strike type give the count


Surge protection

i. Is the surge protection system working

normal?


range.

Power Supply

i. Is the power supply available meets the


ii. Which power back up system (Generator,

UPS, Battery) available?

iii. AMF panel is manual or automatic?


iv. What is the back-up period

a. UPS

b. Batteries

Cooling

i. Are the number of a/c sufficient to maintain






maintenance done?

3. Fire protection

i. Are the fire extinguishers working normal

ii. Mention type of extinguisher used

iii. Are they suitably placed for easy approach?

iv. Are they tested for functionality as per

schedule?

v. When they were last tested?

4. Cabling & arrangement of CNS related equipage at tower

i. Are the cables properly layed and tagged?

ii. Is the arrangement of CNS monitoring and operational devices are in proper order and not causing any hindrance to normal


operation at tower?

iii. Is there proper access to the CNS installation at tower for easy corrective maintenance?

iv. Is the man-pack available at tower is in good working condition and its range is regularly checked.

a. Mention current range

v. Is the UPS power available for all vital facilities at the tower?


Daily activity log format Annex-1

Occurrence Resolution

Date Time

Activity/

Complaint Action taken

Date Time


Failures and their causes Annex - 2

Facility:……………………………….. Tx/Rx………………………..

Date Duration

From To

Failure/Symptom Cause Remedial Action Remarks

DIRECTOR GENERAL OF CIVIL AVIATION

DIRECTORATE OF AS & ANS

CHECKLIST FOR CERTIFICATION OF CNS FACILITIES: MSSR

NAME OF AIRPORT

DATE OF COMPLETION OF INSTALLATION

PERIOD FOR INSPECTION

DATE

STATION INCHARGE NAME: DESIGNATION:

UNIT INCHARGE

NAME: DESIGNATION:

GENERAL REQUIREMENTS

No. Aspects CAR

Reference

Compliance

Status

Remark

1 Ambience

i. Is the equipment room meeting the environmental conditions for satisfactory equipment performance?

a. Temperature

b. Humidity

c. Dust-proof (check for window pain breakage, space between the door frame and doors)?

2 Civil Works

Building

i. Is the approach to the building clear of grass and other vegetation?



No. Aspects CAR

Reference

Compliance

Status

Remark

Frangible huts


a. Is building properly sealed from all sides to prevent entry of any reptile such as rats, snakes etc.?

b. Is the thermal insulation in walls and roof sufficient to meet the temperature requirement of the equipment?

3. Electrical Works

Earthing

i. Is the earthing of the electrical installations ok?






No. Aspects CAR

Reference

Compliance

Status

Remark

Lightning protection

iii. Is the lightning protection system working normal?

a. Name the type


Surge protection

i. Is the surge protection system working normal?

a. Name the type and give operational range

Power supply

i. Is the power supply available meets the standard (Voltage, frequency)?

ii. Which power backup system (Generator, UPS, and Battery) available?

iii. AMF panel is manual or automatic?


iv. What is back-up period

a. UPS

b. Batteries

No. Aspects CAR

Reference

Compliance

Status

Remark

Cooling

i. Are the no. of a/c sufficient to maintain the temperature required for the equipment

a. Is their preventive maintenance being done as per schedule?

b. When was the last preventive maintenance done?

Equipment Performance Requirements

No. Aspects Reference value/ tolerance Annex/

CAR

Reference

Actual

value

Compliance

status

Remarks

General Ground System Requirements

1.

Maximum range Shall have a maximum range of 256 NM.

2. Coverage a. System must provide coverage through 360 degrees of azimuth, from radio horizon to 60,000 feet, from 0.5 to 256 NM slant range.

b. Top coverage must be preserved to at least 45,000 feet at the angle of at least 45 degree above the horizontal, measured from an antenna position

3. Detection requirement Shall have a minimum detection range of

a. With GTC selected > ½ NM. b. With GTC deselected ¼ NM.

4. Reply detection Shall be capable of detecting and

processing replies from all targets having a

capability to reply with anyone of the 4096

codes.


CAR

Reference

Actual

value

Compliance

status

Remarks

5. Probability of detection a. The minimum overall probability of detection (Pd) shall be > 98% on all Targets.

b. Shall have a round reliability exceeding 90%.

6. False target report ratio The overall false target report ratio shall be

less than 0.1%.

7. Range Resolution Shall be capable to resolving two targets

that differ in range by 1/32 NM, but having

identical azimuth and identical transponder

delays.

8. Resolution capability Range resolution:

From 0 to 0.05 NM detection probability

shall be > 60%

From .05 NM to 2 NM detection probability

shall be > 98%

Azimuth resolution:

From 0 to 0.6 deg detection probability

shall be > 60%

From 0.6 to 2.4 deg detection probability

shall be > 98%

9. Range and Azimuth precision a. Range precision shall be of at least 1/128 NM at all ranges.

b. Azimuth precision shall be of at least 0.022 deg at all ranges and azimuths.


CAR

Reference

Actual

value

Compliance

status

Remarks

10. Target load Shall handle up to 900 targets per scan.

11. Correlation in the cone of silence Shall be able to maintain tracks of up to 12

targets simultaneously for correlation

between entry to and exit from cone of

silence.

12. Undesired targets Shall be capable to eliminate or suppress

any undesired phenomena such as

i. false replies (reflections) ii. garble replies iii. second-time-around replies iv. azimuth jitter v. azimuth/range splits vi. fruit vii. replies from antenna side lobes Without inhibiting the detection and

processing of desired replies within the

coverage volumes.

13. Built In Test Equipment (BITE) System shall have BITE which is capable of

continuous monitoring and automatic

changeover if the working channel fails.

14. Calibration Performance Monitoring

Equipment (CPME)

Minimum two nos. should be available

having high integrity and high reliability.


CAR

Actual

value

Compliance

status

Remarks

Reference

15. Interrogation All Call Shall interrogate, detect and acquire Mode

A, C and S from appropriately equipped

aircrafts for operating on following

functions:

a. Mode 3/A,C,S All-Call; b. Mode A/C All-Call; c. Mode S All-Call.

16 Interrogation selective Shall provide addressed surveillance

functions and standard length

communication transactions as below:

a. Surveillance, altitude request; b. Comm A altitude request; c. Surveillance identity request; d. Comm A identity request; e. Surveillance, altitude reply; f. Comm B altitude reply; g. Surveillance identity reply; h. Comm B identity reply; i. Lockout protocols; j. Basic data protocol including:

- Flight status; - Capability reporting

k. Standard length comm. Protocols: - Comm A;

- Comm A broadcast;

- Ground initiated Comm B(DICB);

- Air initiated Comm B (AICB);

- Comm B broadcast;

l. Surveillance identifier (SI) and

Interrogator identifier (II)

Detailed Technical Characteristics of Ground Equipment


CAR

Reference

Actual

value

Compliance

status

Remarks

1 Transmission frequency 1030+0.01 MHz

3.1.2.1.1

2 Receiver Frequency 1090+1 MHz

3.1.2.2.1

3 Transmission spectrum Shall conform to specifications shown in fig

3.2 in Annex-I

3.1.2.1.2

Power level + 4MHz from carrier

(dBc)


(dBc)


(dBc)

Power level +10MHz from carrier

(dBc)


(dBc)


(dBc)


(dBc)


(dBc)


(dBc)


CAR

Reference

Actual

value

Compliance

status

Remarks

4. Polarization of Sum, Control and

Reply transmission

Shall be vertical 3.1.2.1.3

Interrogation pulses characteristics

Modulation

Carrier frequency shall be pulse modulated

and P6 pulse shall have internal phase

modulation.

3.1.2.1.4

Pulse modulation: Shall conform to the values and the 3.1.2.1.4.1

tolerances given in Annex-I Table 3-1.

Phase modulation: The short and long P6 pulses internal binary

differential phase modulation shall consists

of 180-degree phase reversal of the carrier

at a 4 megabit per second rate.

3.1.2.1.4.2

Phase reversal duration < 0.08 μs

3.1.2.1.4.2.1

Phase relationship The tolerance on the 0 to 180 deg phase

relationship between chips and on the sync

phase reversal within the P6 pulse shall be

+5 deg.

3.1.2.1.4.2.2

5. Transmission power levels Provide the expected and obtained power outputs for sum and control signals at different power levels of the

systems.

No. Aspects Reference value/ tolerance Annex/ Actual Compliance Remarks

CAR

Reference

value status

6 Minimum effective radiated power

that is consistent with the

operationally required range without

creating any interference?

As per station operational requirement. 3.1.1.8.2

7 Inactive-state interrogator output

power

When the interrogator transmitter is not

transmitting an interrogation, its output

shall not exceed -5 dBm effective radiated

power at any frequency between 960 MHz

to 1215 MHz.

3.1.2.11.3

7 Spurious Signals radiation

Spurious CW radiation Shall exceed 76 dB below 1 W

3.1.1.11.1

Spurious response to signals not Shall be at least 60 dB below normal 3.1.2.11.5

within the receiver pass band

sensitivity

8. Mode A/C/S all-call interrogation

Interrogation pulses Shall conform to specification as shown in

fig 3.3 in Annexure –I

3.1.2.1.5.1.1

Pulse intervals Pulse intervals between P3 shall and P4

shall be 2 + 0.05 μs.

3.1.2.1.5.1.3


CAR

Reference

Actual

value

Compliance

status

Remarks

Pulse amplitude The amplitude of P4 shall be within 1 dB of

the amplitude of P3

3.1.2.1.5.1.4

All-call interrogation repetition rate a. Shall be less than 250 per second.

( This rate shall also apply to the paired Mode S-

only and mode A/C only all-call interrogations

used for acquisition in the multisite mode)

3.1.2.11.1.1

9. Mode S Interrogation

Interrogation pulses Shall conform to specification given in

Annex-I figure 3.4

3.1.2.1.5.2

Side-lobe suppression P5 pulse shall be used with the Mode S-

only all-call interrogation. It shall be

transmitted using a separate antenna

pattern.

3.1.2.1.5.2.1

Data phase reversals a) 16.25 μs P6 pulse shall contain at the

most 56 data phase reversals.

b) 30.25 μs P6 pulse shall contain at the

most 112 data phase reversals.

c) Each data phase reversal shall occur at a

time interval (N times 0.25) plus or minus

0.02 microsecond (N equal to, or greater

than 2) after the sync phase reversal.

d) The last chip, that is the 0.25

microsecond time interval following of the

last data phase reversal position, shall be

followed by a 0.5-microsecond guard

interval.

3.1.2.1.5.2.3


CAR

Actual Compliance Remarks

Reference value status

Pulse intervals Between

a) P1 and P2 = 2+0.05 μs.

b) Leading edge of P2 and sync phase

reversal of P6= 2.75+0.05 μs

c) Leading edge of P2 and sync phase

reversal = 1.25+0.05 μs

d) P5 shall be centered over sync phase

reversal.

e) Leading edge of P5 shall occur 0.4+0.05

μs before the sync phase reversal.

3.1.2.1.5.2.4

Pulse amplitudes a) The amplitude ofP2 and the amplitude of

the first microsecond of P6 shall be greater

than the amplitude of P1 minus 0.25 dB

c) The amplitude variation between

successive chips in P6 shall be less than

0.25 dB.

d) The radiated amplitude of P5 at the

antenna of the transponder shall be:

i) equal to and greater than the radiated

amplitude of P6 from the side-lobe

transmissions of the antenna radiating P6

ii) at a level lower than 9 dB below the

radiated amplitude of P6 within the desired

3.1.2.1.5.2.5

arc of interrogation.

Interrogation repetition rates Mode S interrogators shall use the lowest

practicable interrogation repetition rates

for all interrogations modes.

3.1.2.11.1


CAR

Reference

Actual

value

Compliance

status

Remarks

Tolerances on transmitted signals. In order that the signal-in-space be

received by the transponder as described in

3.1.2.1, the tolerances on the transmitted

signal shall conform to tolerance as

summarized in Table 3-2.

3.1.2.11.4

11. Reply Detection & Code Detection

Mode 3/A reply detection a) Bracket detection: if F1 to F2 spacing is

20.3+0.2 μs

b) Code pulse detection: if they are at

nominal position +0.2 μs.

Mode S reply detection a) Preamble detection: If the pulse interval

from the first transmitted pulse to the

second, third and fourth transmitted pulses

shall be 1, 3.5 and 4.5 μs, respectively with

a tolerance of 50 ns.

b) If the reply data block begins 8

microseconds after the leading edge of the

first transmitted pulse.

12. Overlapped replies detection Shall be able to detect both Mode 3/A and

Mode S overlapped replies.

13. Detection of two close replies Shall be able to detect two close replies

separated by 1.75 μs.


CAR

Reference

Actual

value

Compliance

status

Remarks

Antenna Sub System – Technical Performance Parameters

1 Central Frequency

Sum Channel : 1030+3.5 MHz and

1090+5Mhz

Difference Channel : 1090+5 MHz Omni-

directional Channel: 1030+3.5 MHz and

1090+ 5MHz.

2 VSWR

Shall not exceed 1.5:1 referred to a 50 ohm

line.

3 Cross polarized radiation

The cross polarized radiation shall be 25 dB

below the local peak.

4 Structural Strength

Shall be able to withstand a wind of 160

Km/h during operation.

Ancillaries

Equipment Maintenance & Spares

S. No.

Parameter Compliance Status Remarks

A Are all the maintenance activities being performed in the unit and duly being

recorded?

Preventive

a. Daily recording of essential parameters and meter readings.



d. Six monthly as per approved schedules.

e. Maintenance of fault log book.

2. Is there any parameter out of tolerance for which remedial action is yet to be

taken?

3. If yes then indicate the parameter and mitigation plan?

Corrective

4. Is the manufacturer or indigenous backup support available for fault isolation

and rectification?

5. If not then what is the contingency plan in case of failure?

B Spares

1. Have the critical spares been identified?

2. Are they available (on site or depot)?

Note: If any of the above activity not required as per manufacturer

recommendation and AAI approval, the same may be notified and concurrence of

DGCA may be obtained

Equipment Manuals & Documents

A Schedules

i. Are these preventive schedules as approved by DGCA available?

a. Daily schedule

b. Weekly schedule

c. Monthly schedule


e. Yearly schedule

B Log books

i. Are the following log books available?

a. Fault log book




C Manuals

i. Are the following manuals as supplied by the manufacturer available?


b. Are all the volumes of operational manuals available?

D ICAO Documents/DGCA CARs/CNS Manuals


a. Annex- 10

b. CARs

c. Doc 8071

d. CNS manual


Human resource:

A. Adequacy

i. What is the manpower requirement, for maintenance and the operation of the

facility, as per approved norms?


iii. If not, what is the mitigation plan?


i Is the staff deployed, for the operation and maintenance of the facility,

proficient on this type of equipment?

ii Have they undergone refresher training & OJT before deployment?