Airworthiness Directive · Amendment 39-10464 · Boeing Model 747-100, -200, and -300 Series Airplanes
Boeing Model 747-100, -200, and -300 Series Airplanes
Model 747-100, -200, and -300 series airplanes having line positions 1 through 886 inclusive, certificated in any category; excluding airplanes on which the strut/wing modification has been accomplished in accordance with AD 95-13-07, amendment 39- 9287; or AD 95-10-16, amendment 39-9233; and excluding airplanes designated as Group 5 in Boeing Service Bulletin 747-54A2179, Revision 2, dated December 4, 1997.
This amendment adopts a new airworthiness directive (AD) that is applicable to certain Boeing Model 747-100, -200, and -300 series airplanes. This action requires repetitive detailed visual and/or borescope inspections to detect discrepancies of certain areas of the wing strut. This amendment also provides for an optional terminating action for the repetitive inspections. This amendment is prompted by reports that fatigue cracking was found in the vertical chords, midspar webs, and canted closure webs. The actions specified in this AD are intended to detect and correct fatigue cracking and stress corrosion of the wing strut, which could result in failure of the strut-to-wing interface, and consequent separation of the engine and strut from the airplane.
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
