Airworthiness Directive · Amendment 39-10571 · Eurocopter France Model AS 332C, L, L1, and L2 Helicopters
Eurocopter France Model AS 332C, L, L1, and L2 Helicopters
Model AS 332C, L, L1, and L2 helicopters, with intermediate gearboxes (IGB), part numbers (P/N) 332A35-0002 all dash numbers, 332A35-0010 all dash numbers, or 332A35-0011-01, installed, except those IGBs modified in accordance with MOD 0761049 or MOD 0761050, certificated in any category.
This amendment adopts a new airworthiness directive (AD), applicable to Eurocopter France Model AS 332C, L, L1, and L2 helicopters that requires visually inspecting the intermediate gearbox- to-structure attachment stirrup (stirrup) front tabs for cracks, and if a crack is discovered, removing the intermediate gearbox and replacing it with an airworthy intermediate gearbox; and inspecting for the conformity of the attachment parts. This amendment is prompted by five reports of failure of the two stirrup tabs. The actions specified by this AD are intended to prevent failure of the intermediate gearbox stirrup front tabs, loss of anti-torque drive, and subsequent loss of control of the helicopter.
