Airworthiness Directive · Amendment 39-13251 · Eurocopter France Model AS350B, B1, B2, B3, BA, and D Helicopters
Eurocopter France Model AS350B, B1, B2, B3, BA, and D Helicopters
Model AS350B, B1, B2, B3, BA, and D helicopters, certificated in any category.
This amendment adopts a new airworthiness directive (AD) for the specified Eurocopter France (ECF) model helicopters that requires replacing the main gearbox (MGB) opening neoprene cowling seals (seals) with airworthy glass/silicone seals. This amendment is prompted by the discovery that neoprene seals currently installed on the MGB opening cowlings do not provide the fire protection required by the airworthiness standards. The actions specified by this AD are intended to prevent a fire in the engine compartment from reaching the MGB compartment that contains parts that are not fire resistant and subsequent loss of control of the helicopter.
