Airworthiness Directive · Amendment 39-10635 · Eurocopter France Model AS-350B, BA, B1, B2, and D, and Model AS-355E, F, F1, F2, and N Helicopters
Eurocopter France Model AS-350B, BA, B1, B2, and D, and Model AS-355E, F, F1, F2, and N Helicopters
Superseded. A later AD replaced this one: AD 2000-10-10. Comply with the one in force.
Model AS-350B, BA, B1, B2, and D, and Model AS- 355E, F, F1, F2, and N helicopters, with main gearbox suspension bi- directional cross-beam (cross-beam), part number (P/N) 350A38-1018- all dash numbers, installed, certificated in any category.
This amendment adopts a new airworthiness directive (AD), applicable to Model AS-350B, BA, B1, B2, and D, and Model AS-355E, F, F1, F2, and N helicopters, that requires inspections of the main gearbox suspension bi-directional cross-beam (cross-beam) for cracks, and replacement of the cross-beam if a crack is found. This amendment is prompted by several reports of cracks in the cross-beam. The actions specified by this AD are intended to provide a terminating action to prevent failure of the cross-beam that could cause the main gearbox to pivot, resulting in severe vibrations and a subsequent forced landing.
