Boeing Model 737-600, -700, -700C, -800, -900 Series Airplanes

Subject: B737 ¿ Aft Pressure Bulkhead Webs ¿ Comments on Proposed Rule Ladies/Gentlemen: FAA proposes to adopt a new airworthiness directive (AD) for certain Boeing 737-600, -700, -700C, -800 and -900 series airplanes. This proposed AD would require repetitive detailed, low frequency eddy current, and high frequency eddy current inspections of the webs of the aft pressure bulkhead at body station 1016 for cracks, and corrective action if necessary. ATA appreciates the opportunity to comment on this proposed rule. Our members generally support the intent of the rulemaking; however, additional review and clarification would be desirable on the attached comments. Specifically: ¿Repair ¿ The referenced Service Bulletin does not offer any repairs nor terminating action should cracks be discovered. Since the type and scope of repair is unknown until cracks are found there is no estimate given for task hours for repair or preventive modification. Your serious consideration of these observations and comments would be greatly appreciated. Sincerely, Robert Peel Director of Quality Air Transport Association