Summary
The FAA proposes to adopt a new airworthiness directive (AD) for all Boeing Model 737-600, -700, -700C, -800, and -900 series airplanes. This proposed AD would require repetitive inspections of the aft pressure bulkhead web for fatigue cracks, crack indications, discrepant holes, and corrosion, and repair if necessary. This proposed AD is prompted by reports of fatigue cracks in the aft pressure bulkhead web. We are proposing this AD to detect and correct such fatigue cracks, which could result in a rapid decompression of the airplane.