Airworthiness Directive · Amendment 39-9370 · The Boeing Company Airplanes
The Boeing Company Airplanes
Superseded. A later AD replaced this one: AD 95-19-08 R1. Comply with the one in force.
This AD applies to The Boeing Company 727-100 Series, 727-100C Series, 727-200 Series, 727-200F Series.
The models as the FAA's AD index lists them. The serial ranges, installed parts and exceptions are in the AD itself: read it at the FAA.
This amendment adopts a new airworthiness directive (AD), applicable to certain Boeing Model 727-100 and -200 series airplanes, that requires replacing the attaching nutplates on certain engine nose cowls with washers and self-locking nuts. This amendment is prompted by reports indicating that nose cowls separated (or nearly separated) from the engines of certain airplanes following failure of the engine fan blade and subsequent vibration of the engine, which caused loosening of the attach bolts on the nose cowl of the engine. The actions specified by this AD are intended to prevent the attach bolts from becoming loose, which could result in subsequent separation of the nose cowl from the engine.
