Airworthiness Directive · Amendment 39-12621 · Israel Aircraft Industries, Ltd., Model 1124 and 1124A, and Model 1125 Westwind Astra Series Airplanes
Israel Aircraft Industries, Ltd., Model 1124 and 1124A, and Model 1125 Westwind Astra Series Airplanes
All Model 1124 and 1124A series airplanes, and Model 1125 Westwind Astra series airplanes having serial numbers 004 through 072 inclusive and 074 through 078 inclusive; certificated in any category.
This amendment adopts a new airworthiness directive (AD), applicable to all Israel Aircraft Industries, Ltd., Model 1124 and 1124A, and certain Model 1125 Westwind Astra series airplanes, that requires a one-time inspection of the attachment bolts installed on the engine inlet cowl and aft nacelle attachment flanges to verify correct part numbers of the bolts, and replacement of any discrepant/incorrect bolt with a correct attachment bolt. The actions specified by this AD are intended to prevent failure of attachment bolts due to fatigue, which could result in separation of the engine inlet cowl and aft nacelle, and consequent damage to the horizontal or vertical stabilizer. This action is intended to address the identified unsafe condition.
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.
