Airworthiness directives › 2013-15-03
AD 2013-15-03 Airworthiness Directives; Eurocopter France (Eurocopter) Helicopters
Applicability*9
We must receive comments on this AD by September 23, 2013.
Compliance
Within 10 hours TIS, and thereafter at intervals not exceeding 25 hours TIS: (1) Uncouple the pulley from the hydraulic pump. (2) Using a mirror and a light, inspect the hydraulic pump drive pulley bearing (pulley bearing) for leaking grease from each lip seal of the four greasing orifices (lip seal) due to wear, a crack or tear in a lip seal, a run of rust on a lip seal, indication of overheating shown by brown coloring on the inner ring of the bearing, and for any distortion, impact, wear, a tear, a crack, or loss of grease on each sealing flange. (3) Manually rotate the pulley bearing through several full turns and inspect for a friction point, brinelling, or a noise from the bearing. (4) If there is any leaking grease from a lip seal, a crack or tear in a lip seal, a run of rust on a lip seal, indication of overheating shown by brown coloring on the inner ring of the bearing, or distortion, impact, wear, a tear, a crack, or loss of grease on a sealing flange, or a friction point, brinelling, or noise from the bearing, before further flight, replace the hydraulic pump drive assembly.
Required actions
(1) The Manager, Safety Management Group, FAA, may approve AMOCs for this AD. Send your proposal to: Matt Wilbanks, Aviation Safety Engineer, Regulations and Policy Group, Rotorcraft Directorate, FAA, 2601 Meacham Blvd., Fort Worth, Texas 76137; telephone (817) 222-5110; email matt.wilbanks@faa.gov. (2) For operations conducted under a 14 CFR part 119 operating certificate or under 14 CFR part 91, subpart K, we suggest that you notify your principal inspector, or lacking a principal inspector, the manager of the local flight standards district office or certificate holding district office, before operating any aircraft complying with this AD through an AMOC.
Unsafe condition
You are responsible for performing each action required by this AD within the specified compliance time.
Affected ADs
This AD defines the unsafe condition as seizure of the hydraulic pump drive pulley bearing. This condition could result in hydraulic pump drive belt failure, loss of hydraulic servo assistance, and subsequent loss of control of the helicopter.
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