EUROCOPTER CONFIDENTIAL

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Asia-Pacific Dauphin Operators SymposiumTechnical Support Workshop General Presentation 5th – 6th December 2012, Singapore

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Dauphin Fleet Information & Status

Update on Modification Status

• TRH Pitch Control Rod Bearing

• MGB Planet Gear Carrier

• Horizontal Stabilizer

Maintenance Improvement & Optimization

Open Discussion & Presentation of Customer’s Request

Technical Support Workshop Agenda

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Worldwide Dauphin In-Service Fleet Data (Sept 2012)

Fleet Leaders

AS 365 C2 with T.T: 25 000 F/Hrs

EC155 B1 with T.T: 9 616 F/Hrs

AS 365 N3 with T.T: 10 300 F/Hrs

AS 565 SA with T.T: 8 000 F/Hrs

1010 A/C delivered 867 A/C in ServiceE

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More than 280 Operators in 70 Countries With 5,616,100 F/H

Asia/Far East279

North America148

Central America2

Africa79

South America87 Australia /Oceania

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Europe241

Worldwide Dauphin In-Service Fleet Distribution (Sept 2012)

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Total Flight Hours Cumulated(Sept 2012)

For 1st level enumeration, only use the stylized helicopter as “bullet point”. Arial 20 pt

• 2nd level, Arial 18 pt. • 3rd level. Arial 16 pt

FH Cumulated in Y2012 (Sept): 5,616,100 FH

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� Control bearing failure and chips not detected by TGB magnetic plug

Findings

Control Bearing

Corrective Actions

�New control rod inspection procedure (without removal) every 55fhrs was released in July 2012.

�Two improvements required: part reinforcements and improvement of chips detection performance.

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ATA 65 – TRH Pitch Control Rod Bearing

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� Part reinforcements 1/ 2:� Mod 07-65B56: new control shaft (reduced Dia)

and new sliding bushes: TORLON instead ofPA6-6.

- Target: sliding load reduction on bearing.- Shaft modification embodied in factory only

� Only sliding bushes retrofit is possible through mod 07-65B58 and SB’s:

- 65.00.17 for AS365 N1-N3- 65.00.07 for AS565 - 65-006 for EC155 Diameter reduction

Post mod 65B56

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Corrective Actions

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ATA 65 – TRH Pitch Control Rod Bearing

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Gap increases betweencage and outer ring

Corrective Actions

Current bearing Post mod bearingSpecial commercial condition up to 08/2014

� Part reinforcements 2/2� Mod 07-65B57: New control shaft bearing. Targets:

- Improved chips washing from bearing.

- Bearing reinforced.- Bearing removal easier and without damage with new shaft.- Modification is possible through released SB’s:• 65.00.18 for AS365 N1-N3• 65.00.08 for AS565• 65-007 for EC155

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ALLATA 65 – TRH Pitch Control Rod Bearing

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Corrective Actions

� B) Improved chip detection 1/4. � Chips detected on test bench with new bearing. However several mods are needed.

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ALLATA 65 – TRH Pitch Control Rod Bearing

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� Improved chip detection 2/4� Mod 07-65B59 : New control shaft.

- Target: Increase oil flow to detect chips.- Reminder: Mod 07-65B58 (new bushes) are mandatory with

this post mod shaft.

One Hole

Pre-modPost mod

Three new holes

Corrective Actions

Shaft post mod 65B56 only.

Retrofit possible in factory only

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ALLATA 65 – TRH Pitch Control Rod Bearing

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� Improved chip detection 3/4� Mod 07-65B62 - New conical ring and additional seal.

- Target: increase the oil flow through the bearing and stop the oil return through the lock ring splines.

Seal + shaft groove (not shown)

Lock ring Int. Dia tapered

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Oil outletCorrective Actions

Post mod.

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ATA 65 – TRH Pitch Control Rod Bearing

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� Improved chip detection 4/4:� Mod 07-65B60 - New output wheel with more oil output holes:

- Target: Increase oil flow to wash out chips to themagnetic plug.

- Modification/retrofit applicable only in factory: “D” Level.

Pre mod: only one holePost mod: six additional holes DIA 6mm

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Corrective Actions

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ATA 65 – TRH Pitch Control Rod Bearing

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Corrective Actions

� Synthesis

� AD will be cancelled only after the five mod are embodied:

- 07-65B58 - Sliding bushes: SB’s released - 07-65B57 - New Bearing: SB’s released- 07-65B59 - Control shaft- 07-65B62 - Conical ring/seal Retrofit at D level only.- 07-65B60 - Output wheel:

� Noria, Std exchange with hereafter TGB P/N, post mod 65B63, may be possible on demand before repair or overhaul , depending also of spare availability.

}

An administrative mod, 07-65B63, will cover these five mod’s .A new P/N 365A33-6005.09, will be created when applied.

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ATA 65 – TRH Pitch Control Rod Bearing

� 5 cases of Planet Gear Carrier Crack...

Finding

EC 155 / AS 365 / AS 565

EASB released for planet carrier boroscopic check every 50hrs

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ATA 63 – MGB Planet Gear Carrier

Barrel bearingCover

Reinforcement

Corrective Action: mod 07-63C52

P/N unchanged for Post mod MGB

Post Mod

EC 155 / AS 365 / AS 565

Increased torque on M6 & M8 bolt

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Stainless steel bushing

Pre Mod

ATA 63 – MGB Planet Gear Carrier

� Certification completed in October 2010

� First installation on new EC155: July 2011.

� AD and EASB updated to cancel boroscopic check requirement for aircraft with post mod MGB.

� Parts replaced during repair/overhaul only: D level Op.� Bearing� Cover� Gear carrier (with new SLL)� Sun gear.

ATA 63 - MGB: PLANET CARRIER CRACK

Mod 63C52 Implementation on New MGB

Certification test rig

EC 155 / AS 365 / AS 565

� July 2011 for EC 155.

� January 2012 for all other versions.

�Check in the MGB Log Card for the mod indication before cancelling the EASB check.

Mod 62C52 Retrofit Planning

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ATA 63 – MGB Planet Gear Carrier

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Background • In-flight separation and loss of horizontal stabilizer

occurred during VNE demonstration flights without further consequences.

• TIL DA 016-2009

Investigation • Aerodynamic Divergence (termed as “Fluttering”)

• dynamic coupling between vertical flapping & torsion modes (sudden occurrence & dependant on IAS).

Protective Measure • EASB 01.00.60

• VNE limit revised to 150 kt• Rate of descent : ≤ 1500 ft/min (beyond 140 kt IAS)

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ATA 55 – Horizontal Stabilizer(150 kts VNE limitation) AS 365 / AS 565

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� Digital mockup was performed to quantify improvement for each technical solution:Addition of composite lays, weights addition, etc…..

� Rubber stops solution was cancelled for certification difficulties reason.� Vertical fin size reduction was stopped after non conclusive flight tests performed in July 2012

� Solution selected is based on bonding with seal and Betamate compound: certification planned for August 2013

Molding Foam

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ATA 55 – Horizontal Stabilizer(150 kts VNE limitation) AS 365 / AS 565

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For 365 /565

� Daily inspections concept replaced by 10hrs/7D inspection:• FLM update issued• MET update is in progress, code date 12-26. Pre-Print available� 50hrs inspection interval increased to 100hrs: • Tech Pub update is in progress, code date 12-26. Pre-print available.� 600hrs inspection interval increased to 1200hrs: • Collection data are in progress with 7 customers• New volunteers are welcomed.� 5 400hrs/10Y inspection intervals increased target to 8 000hrs/14Y in standard

atmosphere: • Rules validated with Design Office.• Hoses OTL issue is under investigation.• A/C inspections has started in Feb 2011. Data already available from 7 A/C’s.

� Electrical bonding checks: • New intervals: from 24 to 48 months, available through ETA • Procedures will be introduced through dedicated SB with photos: SB 24-00-29 for N3 and 24.00.10 for 565.

� Overtorque incident work card: • Work card in final process, ETA available in the meantime

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ATA 05 – Maintenance Optimization

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� Structural and flight controls behavior survey: • Data collected from 15 A/C inspections: NO NEED for Major Inspection.

• For structural inspections, dedicated SB is in progress for all the fleet: 6 000 and 7 200hrs // 8Y and 10Y or 14Y intervals.

• For flight controls synthesis is still in progress, dedicated SB will be issued:6 000 and 7 200hrs // 8Y and 10Y or 14Y intervals

� Electrical bonding checks: • Data collected of 12 A/C inspections.

• New intervals from 24m to 48m, available through ETA in the mean time.

• Procedures will be introduced by dedicated SB with photos: SB 24-019.

� Mast rotor bearing OTL extension:• From 2500 h to 3300hrs. Performed by interested customers through ETA. Volunteers are welcomed

�Overtorque work card with simplified process and operation was released

For EC155

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ATA 05 – Maintenance Optimization

T H A N K Y O U

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