Airworthiness Directive · Amendment 39-17850 · Ice/rain protection system wiring
Airbus Helicopters (Type Certificate Previously Held By Eurocopter France) Helicopters
This AD applies to Model AS332L1 helicopters, serial number (S/N) 2774, and Model EC225LP helicopters, S/N 2600, 2623, 2645, 2656, 2659, 2663, 2666, 2670, 2673, 2685, 2691, 2692, 2693, 2702, 2715, 2716, 2721, 2725, 2739, 2744, 2747, 2753, 2756, 2759, 2767, 2779, and 2794, certificated in any category.
We are adopting a new airworthiness directive (AD) for certain Airbus Helicopters Model AS332L1 and Model EC225LP helicopters. This AD requires relocating the power supply circuit breaker source of one engine's multi-purpose air intake (MPAI). This AD is prompted by a report that power loss to the MPAI could open the engine air intakes, which could result in engine ice ingestion during flight in icing conditions. These actions are intended to prevent ice ingestion by both engines, which could result in complete loss of engine thrust, and possible loss of control of the helicopter.
You are responsible for performing each action required by this AD within the specified compliance time unless it has already been accomplished prior to that time.
Before flight into known icing conditions:
(1) For Model AS332L1 helicopter, S/N 2774, relocate the engine 1 Multi-Purpose Air Intake (MPAI) power supply circuit breaker as described in the Accomplishment Instructions, paragraph 3.B.2., and Figures 1, 2, and 3 of Eurocopter Alert Service Bulletin (ASB) No. AS332-30.00.74, Revision 0, dated July 31, 2013.
(2) For Model EC225LP helicopters, S/N 2600, 2623, 2645, 2656, 2659, 2663, 2666, 2670, 2673, and 2693, relocate the engine 2 MPAI power supply circuit breaker as described in the Accomplishment Instructions, paragraph 3.B.2.a., and Figures 1 and 2 of Eurocopter ASB No. EC225-30A032, Revision 0, dated July 31, 2013.
(3) For Model EC225LP helicopters, S/N 2685, 2691, 2692, 2702, 2715, 2716, 2721, 2725, 2739, 2744, 2747, 2753, 2756, 2759, 2767, 2779, and 2794, relocate the engine 2 MPAI power supply circuit breaker as described in the Accomplishment Instructions, paragraph 3.B.2.b., and Figures 1 and 3 of Eurocopter ASB No. EC225-30A032.
(4) For all model helicopters, perform a functional test of each MPAI after relocating the MPAI power supply circuit breaker.
