Airworthiness Directive · Amendment 39-10015 · British Aerospace Model BAC 1-11 200 and 400 Series Airplanes
British Aerospace Model BAC 1-11 200 and 400 Series Airplanes
All Model BAC 1-11 200 and 400 series airplanes, certificated in any category.
This amendment adopts a new airworthiness directive (AD), applicable to all British Aerospace Model BAC 1-11 200 and 400 series airplanes, that requires repetitive ultrasonic inspections to detect cracking of the lugs of the engine mounting beams, and replacement of the beam with a serviceable part, if necessary. This amendment is prompted by reports of fatigue cracking of the lugs of the engine mounting beams. The actions specified by this AD are intended to detect and correct such cracking of the engine mounting lugs, which could result in reduced structural capability of the engine mount.
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.
