Airworthiness Directive · Amendment 39-10938 · Boeing Model 757-200 Series Airplanes Powered by Rolls-Royce RB211-535E4/E4B Engines
Boeing Model 757-200 Series Airplanes Powered by Rolls-Royce RB211-535E4/E4B Engines
Model 757-200 series airplanes equipped with Rolls-Royce RB211-535E4/E4B engines fitted with nose cowls having serial numbers 9001 through 9124 inclusive; certificated in any category.
This amendment adopts a new airworthiness directive (AD), applicable to certain Boeing Model 757-200 series airplanes, that requires repetitive inspections to detect cracking of the honeycomb core of the acoustic panels in the engine inlet, and repair, if necessary. This amendment also requires eventual replacement of the existing engine inlet with a new or serviceable inlet, which, when accomplished, terminates the repetitive inspections. This amendment is prompted by reports of cracking of the honeycomb core of the acoustic panels in the engine inlet, and incidents of pieces of the panels breaking off and being ingested into the engine. The actions specified by this AD are intended to detect and correct cracking of the honeycomb core of the acoustic panels in the engine inlet, which could result in reduced structural integrity of the engine inlet, and consequent engine shutdown or surge; or, in the event of a fan blade failure, separation of the inlet from the engine.
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.
Aircraft
