Regulacje i polityka gospodarcza · 15/12/2014

Airworthiness Directives; the Boeing Company Airplanes

We propose to adopt a new airworthiness directive (AD) for certain the Boeing Company Model 737-700, -800, and -900ER series airplanes. This proposed AD was prompted by reports of troughs in the skin along the chem-mill pocket edges of certain fuselage crown skin panel assemblies. This proposed AD would require repetitive inspections to detect cracking in the crown skin panel assembly. This proposed AD would also provide optional terminating action for the repetitive inspections. We are proposing this AD to detect and correct cracking from troughs in the chem-mill pocket edges, which could lead to rapid decompression of the airplane.