Summary
We propose to supersede an existing airworthiness directive (AD) that applies to certain The Boeing Company Model 767 airplanes. The existing AD currently requires revising the Airworthiness Limitations Section of the maintenance planning data (MPD) document. Since we issued that AD, a re-evaluation of certain doors and flaps was done based on their fatigue-critical nature. This proposed AD would revise the maintenance program to incorporate an additional limitation, and would add airplanes to the applicability. We are proposing this AD to detect and correct fatigue cracking of the principal structural element (PSEs), which could adversely affect the structural integrity of the airplane.