NH90-NFH-Caiman_Erfahrungen der Französischen Marine
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French Navy Feedback<br />
June 2012 <strong>NH90</strong> User Group LT Duclos
Aircraft behaviour<br />
Embarkation Feedback<br />
• Good behaviour with cross wind and<br />
turbulences conditions<br />
• Homologation granted on Horizon frigates,<br />
LHD, CDG aircraft carrier<br />
Mooring<br />
• Step A<br />
25 mn to secure the aircraft<br />
AGE not suitable for ops<br />
• Step B improvements must be applicable<br />
on step A.
Folding<br />
Embarkation Feedback<br />
• Very poor reliability, 1 failure every 8 folding sequences<br />
NOGO for embarkation<br />
2010 2011 2012 Total<br />
ATFA 1 1<br />
ATLA 1 1<br />
MRBFA 4 6 10<br />
MRSLA 10 7 17<br />
MRIA 3 1 4<br />
FAC 3 1 4<br />
• MRSLA : intermediate solution on a/c 06 – 07<br />
• Cracks of spring support on fwd folding mechanism assembly<br />
(5 occurrences), new design in study<br />
• Hydraulic leak on swivel manifold seizure<br />
Creation monthly working group
Embarkation Feedback<br />
Traversing issue<br />
• SAMAHE vs AHS (Autonomous Handling system)<br />
Need to establish the Douglas Mantis – <strong>NH90</strong> interoperability stability<br />
envelop<br />
Caïman configuration<br />
• Deck lock and 5th pump<br />
• “Step B mooring” on Step A aircrafts (flyable mooring rings)<br />
• Step B Folding AGEs<br />
Received and tested during CW25.<br />
Will be embarqued during CW 28<br />
Technicians skills<br />
• Breaking cords<br />
• Composite repair<br />
• Environnemental control system<br />
• ...
Embarkation Feedback<br />
Maintenance at sea<br />
Servicing<br />
BFF and ALF usually done in the hangar<br />
Tar on the deck<br />
Maintenance<br />
Safety Inspection : 3hours. On the deck or in the hangar<br />
(including FCS Test)<br />
With an anti corrosion treatment : 4 hours<br />
Engine Removal and Installation
Embarkation Feedback<br />
Maintenance at sea : Next steps<br />
Jacking<br />
Removal and installation of :<br />
Front cowling<br />
Bracket<br />
Landing Gear<br />
Scheduled 100FH operations
Technical Feedback<br />
Maintainability<br />
• About 20 MMH/FH (including scheduled & unscheduled<br />
maintenance, servicing + 3 MMH/FH training)<br />
• Scheduled maintenance duration have to be reduced for<br />
deployment at sea (SI – 50FH – 100FH – 150FH & 30D)<br />
Necessity to get the master schedule for maintenance<br />
improvement (impact on human resources format)<br />
Unavailability of 60%<br />
• 45% for scheduled maintenance<br />
• 15% for unscheduled maintenance<br />
Electronic documentation maturity<br />
• IPRF integration in IETP : ratio too low and too long<br />
Short loops requested
Technical Feedback<br />
Rescue Hoist<br />
• Hoist cable jamming<br />
• Hydraulic leak : motor valve (3 occurrences)<br />
• Protection attachement<br />
• Ball bearing hook : Rotation impossible, corrosion issue<br />
(4 occurrences)<br />
Cargo hook<br />
• Unintended release in flight<br />
Necessity to stow the rope attached to the hook in the cabin<br />
while transiting for vertrep mission (no speed limitations)<br />
• Load measurement instability
Technical Feedback<br />
Floatation cover fraying<br />
• More than 15 occurrences<br />
• 17/06/2011, SR 1-6465495: « Industry works with its supplier on<br />
the improvement of the cover assembly. Tolerance and<br />
temporary repair are not conceivable for the moment »<br />
• Spare parts a short term solution, design improvement<br />
expected<br />
Breaking cords rupture on floatation device<br />
• New lacing behaviour required<br />
on the all fleet
Technical Feedback<br />
Wheel Brake Metering Valve (WBMV)<br />
• Untimely jamming on WBMV<br />
• FCC caution well-known and applied by aircrew<br />
• Major failure MLG brakes on 06 during running landing<br />
2011 2012 Total<br />
WBMV 1 5 6<br />
Heat Modulating Valve (HMV)<br />
• Internal seal wear<br />
• Mechanical command jamming<br />
• Design and logistic issues<br />
• Required for SAR operations<br />
2011 2012 Total<br />
HMV 5 5 10
Technical Feedback<br />
Rotor Brake Power Module (RBPM)<br />
• Weakness of the metallic clamp<br />
• Crack of RBPM support<br />
• Design issues<br />
Center Locking Mechanism (CLM)<br />
• Locking axis weakness : solved by new design<br />
• Locking lever lost (4 occurrences) : tyraps solution not satisfactory<br />
Impact on tow position during steering manoeuvre<br />
Main Avionic Bay Fan<br />
• Electrical motor issue<br />
• Stator fixation issue<br />
Design and logistic issues<br />
2011 2012 Total<br />
RBPM 3 6 9<br />
CLM 11 5 16<br />
MAB Fan 0 4 4
We need now to embark for maritime<br />
operations : worldwide and long deployments.
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