# AD 91-14-03: Fuel Distribution Pipe - Type: Airworthiness directive - Status: Current - Products: Boeing MD-11 and MD-11F - Effective: July 5, 1991 - Superseded by: Nothing supersedes this AD - Product type: Aircraft, Large airplane - Amendment: 39-7045 - Docket: 91-NM-119-AD - Registered aircraft: 108 may be affected, by airframe or engine model (OpenAirDocs) - FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/945D6973D2404B7586256A080064BBD2.0001 - DRS record last changed: May 30, 2024 - Page: https://openairdocs.org/ad/91-14-03 ## The airworthiness directive 91-14-03 MCDONNELL DOUGLAS: Amendment 39-7045. Docket No. 91-NM-119-AD. Applicability: Model MD-11 and MD-11F series airplanes, with manufacturer's fuselage numbers 447 through 449, 451 through 461, and 463, certificated in any category. Compliance: Required as indicated, unless previously accomplished. To prevent fuel leakage from the tail tank fuel distribution pipe assembly shroud coupling when the shroud system contains fuel, accomplish the following: (a) Within 30 flight hours after the effective date of this AD, and thereafter at intervals not to exceed 100 flight hours, visually inspect the tail tank fuel distribution pipe assembly located in the left main landing gear wheel well for correct pipe flange position, in accordance with the accomplishment instructions of McDonnell Douglas MD-11 Alert Service Bulletin A28-14, dated April 11, 1991 (hereinafter referred to as SB A28-14). (1) If the pipe flange measurement is within the dimensions specified in SB A28-14, no action is required. (2) If the pipe flange measurement is not within the dimensions specified in SB A28-14, prior to further flight, accomplish either subparagraph (a)(2)(i) or (a)(2)(ii) of this AD: (i) Reposition the pipe assembly in accordance with the accomplishment instructions of SB A28-14 and continue inspections at intervals not to exceed 100 flight hours; or (ii) Install a fuel pipe assembly shroud support bracket in accordance with the accomplishment instructions of McDonnell Douglas MD-11 Service Bulletin 28-14, dated May 17, 1991. (b) Installation of a fuel pipe assembly shroud support bracket in accordance with the accomplishment instructions of McDonnell Douglas Service Bulletin 28-14, dated May 17, 1991, constitutes terminating action for the requirements of paragraph (a) of this AD. (c) An alternative method of compliance or adjustment of the compliance time, which provides an acceptable level of safety, may be used whenapproved by the Manager, Los Angeles Aircraft Certification Office (AC0), FAA, Transport Airplane Directorate. NOTE: The request should be forwarded through an FAA Principal Maintenance Inspector (PMI), who may concur or comment and then send it to the Manager, Los Angeles ACO. (d) Special flight permits may be issued in accordance with FAR 21.197 and 21.199 to operate airplanes to a base in order to comply with the requirements of this AD. (e) The inspection, repositioning, and installation requirements shall be done in accordance with McDonnell Douglas MD-11 Service Bulletin A28-14, dated April 11, 1991; and Service Bulletin 28-14, dated May 17, 1991. 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 McDonnell Douglas Corporation, 3855 Lakewood Boulevard, Long Beach, California 90846, Attention: DC-10 Technical Publications, Technical AdministrativeSupport, C1-L5B. Copies may be inspected at the FAA, Northwest Mountain Region, Transport Airplane Directorate, 1601 Lind Avenue S.W., Renton, Washington; or at the Los Angeles Aircraft Certification Office, 3229 East Spring Street, Long Beach, California; or at the Office of the Federal Register, 1100 L Street N.W., Room 8401, Washington, D.C. This amendment (39-7045, AD 91-14-03) becomes effective on July 5, 1991. ## Affected data sheets (1) (OpenAirDocs) The type certificate data sheets whose models the AD names. - [TCDS A22WE](https://openairdocs.org/tcds/A22WE): The Boeing Company; names 2 of 11 models: MD-11, MD-11F ## Registered aircraft it may apply to (OpenAirDocs) Matched by airframe and engine model; the AD's applicability may narrow it by serial number, part number or equipment. - Aircraft: 108 (108 by airframe model, 0 by engine model) - Makers: Mcdonnell Douglas 104, Boeing 4 Models with the most aircraft: - [Mcdonnell Douglas MD-11F](https://openairdocs.org/model/mcdonnell-douglas-md-11f): 100 aircraft (airframe model) - [Mcdonnell Douglas MD-11](https://openairdocs.org/model/mcdonnell-douglas-md-11): 4 aircraft (airframe model) - [Boeing MD-11F](https://openairdocs.org/model/boeing-md-11f): 4 aircraft (airframe model) All 3 models: https://openairdocs.org/ad/91-14-03/models.md Every aircraft: https://openairdocs.org/ad/91-14-03/aircraft.md Its text cites no advisory circulars or STCs. --- OpenAirDocs.org is an independent research project of [Contrail Labs](https://contraillabs.com/). It is not affiliated with the FAA or the NTSB. Source documents are U.S. government works in the public domain.