98-08-11: Fuel Feed Pipe

98-08-11 MCDONNELL DOUGLAS: Amendment 39-10491. Docket 98-NM-126-AD. \n\n\tApplicability: Model MD-11 and MD-11F series airplanes, having manufacturer's fuselage numbers 0447 through 0552 inclusive, and 0554 through 0620 inclusive; certificated in any category. \n\n\tNOTE 1: This AD applies to each airplane identified in the preceding applicability provision, regardless of whether it has been modified, altered, or repaired in the area subject to the requirements of this AD. For airplanes that have been modified, altered, or repaired so that the performance of the requirements of this AD is affected, the owner/operator must request approval for an alternative method of compliance in accordance with paragraph (c) of this AD. The request should include an assessment of the effect of the modification, alteration, or repair on the unsafe condition addressed by this AD; and, if the unsafe condition has not been eliminated, the request should include specific proposed actions to address it. \n\n\tCompliance: Required as indicated, unless accomplished previously. \n\n\tTo prevent a hole in the fuel feed pipe of the number 2 engine caused by electrical arcing, and consequent fuel leakage and possible ignition of the fuel vapors, accomplish the following: \n\n\t(a)\tWithin 7 days after the effective date of this AD, open the circuit breaker of the pneumatic sense line heater tape, install an inoperative ring, and coil and stow the electrical wire to the circuit breaker of the pneumatic sense line heater tape, in accordance with Phase 1 of the Accomplishment Instructions of McDonnell Douglas Alert Service Bulletin MD11-36A030, dated April 2, 1998. Accomplishment of these actions deactivates the pneumatic sense line heater tape. \n\n\tNOTE 2: The pneumatic sense line heater tape of the number 2 engine has been deactivated. This deactivation may cause a nuisance shutdown of the bleed air system of the number 2 engine at top of descent. \n\n\t(b)\tAccomplishment of the inspection to determine if adequate clearance exists between the fuel feed pipe and pneumatic sense lines, and repositioning of pneumatic sense lines, if necessary, in accordance with Phase 2 of the Accomplishment Instructions of McDonnell Douglas Alert Service Bulletin MD11-36A030, dated April 2, 1998; constitutes terminating action for the deactivation of the pneumatic sense line heater tape. \n\n\t(c)\tAn alternative method of compliance or adjustment of the compliance time that provides an acceptable level of safety may be used if approved by the Manager, Los Angeles Aircraft Certification Office (ACO), FAA, Transport Airplane Directorate. Operators shall submit their requests through an appropriate FAA Principal Maintenance Inspector, who may add comments and then send it to the Manager, Los Angeles ACO. \n\n\tNOTE 3: Information concerning the existence of approved alternative methods of compliance with this AD, if any, may be obtained from the Los Angeles ACO. \n\n\t(d)\tSpecial flight permits may be issued in accordance with sections 21.197 and 21.199 of the Federal Aviation Regulations (14 CFR 21.197 and 21.199) to operate the airplane to a location where the requirements of this AD can be accomplished. \n\n\t(e)\tThe actions shall be done in accordance with McDonnell Douglas Alert Service Bulletin MD11-36A030, dated April 2, 1998. This incorporation by reference was approved by the Director of the Federal Register in accordance with 5 U.S.C. 552(a) and 1 CFR part 51. Copies may be obtained from The Boeing Company, Douglas Products Division, 3855 Lakewood Boulevard, Long Beach, California 90846, Attention: Technical Publications Business Administration, Dept. C1-L51 (2-60). Copies may be inspected at the FAA, Transport Airplane Directorate, 1601 Lind Avenue, SW., Renton, Washington; or at the FAA, Transport Airplane Directorate, Los Angeles Aircraft Certification Office, 3960 Paramount Boulevard, Lakewood, California; or at the Office of the Federal Register, 800North Capitol Street, NW., suite 700, Washington, DC. \n\n\t(f)\tThis amendment becomes effective on April 28, 1998, to all persons except those persons to whom it was made immediately effective by emergency AD 98-08-11, issued on April 6, 1998, which contained the requirements of this amendment.