Airworthiness Directive · Amendment 39-12117 · Boeing Model 707 Series Airplanes
Boeing Model 707 Series Airplanes
Model 707 series airplanes; as listed in Boeing Service Bulletin 2378, Revision 1, dated June 30, 1967; certificated in any category.
This amendment adopts a new airworthiness directive (AD), applicable to certain Boeing Model 707 series airplanes, that requires modification of certain areas of the upper skin of the wing. This amendment is necessary to prevent cracking of the upper skin of the wing, which could result in reduced structural integrity of the wing. This action is intended to address the identified unsafe condition.
