Summary
We propose to adopt a new airworthiness directive (AD) for The Boeing Company Model 757-200 series airplanes with certain supplemental type certificates. This proposed AD was prompted by a report indicating that the main cargo door (MCD) forward-most cam latch on the forward center cam latch pair broke during flight. This proposed AD would require repetitive inspections for discrepancies of cam latches, latch pins, and latch pin cross bolts of the MCD; replacement of all alloy steel cross bolts through the latch pins with corrosion-resistant steel (CRES) cross bolts of the MCD; and related investigative and corrective actions if necessary. We are proposing this AD to address the unsafe condition on these products.