Summary
The FAA proposes to adopt a new airworthiness directive (AD) for all The Boeing Company Model 737-100, -200, -200C, -300, -400, and -500 series airplanes. This proposed AD was prompted by a report indicating cracks in the frame inner chord and web at station (STA) 727. This proposed AD would require an inspection for any repair, repetitive inspections of the frame inner chord and web at STA 727 for any crack, and applicable on-condition actions. The FAA is proposing this AD to address the unsafe condition on these products.