Summary
The FAA proposes to adopt a new airworthiness directive (AD) for all The Boeing Company Model 757 airplanes. This proposed AD was prompted by a report of cracks found in the fastener holes at a certain location on the center wing box rear spar, lower skin. This proposed AD would require repetitive inspections for cracking of certain areas of the center wing box rear spar, lower skin and lower chord; and repair. The FAA is proposing this AD to address the unsafe condition on these products.