AD 2007-19-02 Airworthiness Directives; McDonnell Douglas Model MD-11, MD-11F, DC-10-30 and DC-10-30F (KC-10A and KDC-10), DC-10-40, DC-10-40F, and MD-10-30F Airplanes

This AD applies to McDonnell Douglas Model MD-11, MD-11F, DC-10-30 and DC-10-30F (KC-10A and KDC-10), DC-10-40, DC-10-40F, and MD-10-30F airplanes, certificated in any category; as identified in Boeing Service Bulletins DC10-28-250 and MD11-28-129, both dated July 26, 2006.

You are responsible for having the actions required by this AD performed within the compliance times specified, unless the actions have already been done. Measure Electrical Resistance/Corrective & Other Specified Actions (f) Within 60 months after the effective date of this AD: Measure the electrical resistance of the bond between the No. 2 fuel transfer pump adapter surface of the fuel tank and the fuel transfer pump housing flange in accordance with the Accomplishment Instructions of Boeing Service Bulletin DC10-28-250 or MD11-28-129, both dated July 26, 2006, as applicable. (1) If the resistance measurement is 2.5 milliohms or less: No further action is required by this paragraph. (2) If the resistance measurement is more than 2.5 milliohms: Before further flight, electrically bond the fuel tank No. 2 fuel transfer pump housing surfaces in accordance with the service bulletin. (3) Before further flight thereafter, do an electrical resistance bonding test to verify the electrical resistance between the fuel transfer pump housing and the structure is 2.5 milliohms maximum. If that electrical resistance is not achieved, rework the electrical bond until the electrical resistance is achieved. Do the actions in accordance with the service bulletin. Alternative Methods of Compliance (AMOCs) (g)(1) The Manager, Los Angeles Aircraft Certification Office, FAA, has the authority to approve AMOCs for this AD, if requested in accordance with the procedures found in 14 CFR 39.19. (2) To request a different method of compliance or a different compliance time for this AD, follow the procedures in 14 CFR 39.19. Before using any approved AMOC on any airplane to which the AMOC applies, notify your appropriate principal inspector (PI) in the FAA Flight Standards District Office (FSDO), or lacking a PI, your local FSDO. Material Incorporated by Reference (h) You must use Boeing Service Bulletin DC10-28-250, dated July 26, 2006; or Boeing Service Bulletin MD11-28-129, dated July 26, 2006; as applicable, to perform the actions that are required by this AD, unless the AD specifies otherwise. The Director of the Federal Register approved the incorporation by reference of these documents in accordance with 5 U.S.C. 552(a) and 1 CFR part 51. Contact Boeing Commercial Airplanes, Long Beach Division, 3855 Lakewood Boulevard, Long Beach, California 90846, Attention: Data and Service Management, Dept. C1-L5A (D800-0024), for a copy of this service information. You may review copies at the FAA, Transport Airplane Directorate, 1601 Lind Avenue, SW., Renton, Washington; or at the National Archives and Records Administration (NARA). For information on the availability of this material at NARA, call 202-741-6030, or go to: http://www.archives.gov/federal-register/cfr/ibr-locations.html. Issued in Renton, Washington, on August 31, 2007. Stephen P. Boyd, Acting Manager, Transport Airplane Directorate, Aircraft Certification Service. [FR Doc. E7-17829 Filed 9-11-07; 8:45 am] BILLING CODE 4910-13-P

This AD results from a design review of the fuel tank systems. We are issuing this AD to prevent inadequate bonding between the No. 2 fuel transfer pump adapter surface of the fuel tank and the fuel transfer pump housing flange. Inadequate bonding could result in a potential ignition source inside the fuel tank if the fuel transfer pump and structure interface are not submerged in fuel, which, in combination with flammable fuel vapors, could result in a fuel tank explosion and consequent loss of the airplane.