Airworthiness Directive · Amendment 39-12630 · Boeing Model 707 and 720 Series Airplanes
Boeing Model 707 and 720 Series Airplanes
Model 707 and 720 series airplanes, certificated in any category, as listed in Boeing Service Bulletin 2411, Revision 2, dated April 29, 1968.
This amendment adopts a new airworthiness directive (AD), applicable to certain Boeing Model 707 and 720 series airplanes, that requires installation of a new support structure for the trailing edge beam and main landing gear uplock mechanism. This action is necessary to prevent cracking in the frame and adjacent structure near the attach bolt of the main landing gear uplock mechanism, which could lead to compromised structural integrity. This action is intended to address the identified unsafe condition.
