Airworthiness Directive · Amendment 39-9201 · Airbus Helicopters Deutschland GmbH Helicopters
Airbus Helicopters Deutschland GmbH Helicopters
This AD applies to Airbus Helicopters Deutschland GmbH MBB-BK 117 A-1, MBB-BK 117 A-3, MBB-BK 117 A-4, MBB-BK 117 B-1, MBB-BK 117 B-2, MBB-BK 117 C-1.
The models as the FAA's AD index lists them. The serial ranges, installed parts and exceptions are in the AD itself: read it at the FAA.
This amendment adopts a new airworthiness directive (AD), applicable to Eurocopter Deutschland GmbH (ECD) Model MBB-BK 117 A-1, A-3, A-4, B-1, B-2, and C-1 helicopters, that requires a modification of the latches on the transmission and engine cowling access doors. This amendment is prompted by five occurrences of an engine or transmission cowling access door becoming loose in flight. The actions specified by this AD are intended to prevent the transmission and engine cowling access doors from opening in flight, being struck by the main rotor blade, and subsequently, separating from the helicopter and being ingested by the main rotor or tail rotor system resulting in a loss of control of the helicopter.
The aircraft, engines and makers this AD names, by the model designations in its text. A model listed here may still be outside the AD's serial ranges.
