# AD 92-08-51: Engine Fuel Control - Type: Airworthiness directive - Status: Current - Products: Honeywell International ALF502R-3, ALF502R-3A, ALF502R-4, ALF502R-5 and ALF502R-6 - Effective: March 18, 1993 - Superseded by: Nothing supersedes this AD - Product type: Engine - Amendment: 39-8344 - Docket: 92-ANE-13 - Registered aircraft: 35 may be affected, by airframe or engine model (OpenAirDocs) - FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/6DF2CC3F675843E8862568620064529D.0001 - DRS record last changed: May 30, 2024 - Page: https://openairdocs.org/ad/92-08-51 ## The airworthiness directive 92-08-51 TEXTRON LYCOMING: Amendment 39-8344. Docket 92-ANE-13. Applicability: Textron Lycoming Model ALF502R series turbofan engines installed on British Aerospace BAe-146 airplanes. Compliance: Required as indicated, unless accomplished previously. To prevent uncommanded in-flight engine power reduction of engines during inclement weather or icing conditions, accomplish the following: (a) Replace the existing engine fuel control, Part Number (P/N) 2-163-810-07, 2-163-810-12, or 2-163- 810-15 with an improved fuel control, P/N 2-163-810-20, 2-163-810-21, or 2-163-810-23, or rework the existing engine fuel control, in accordance with Textron Lycoming Alert Service Bulletin (ASB) No. A-ALF 502R 73-12, Revision 1, dated April 7, 1992, at the first maintenance access of the engine fuel control or within 300 operating cycles after the effective date of this AD, whichever occurs first. (b) An 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, Engine Certification Office, FAA, Engine and Propeller Directorate. The request should be forwarded through an FAA Principal Maintenance Inspector, who may add comments and then send it to the Manager, Engine Certification Office. NOTE: Information concerning the existence of approved alternative methods of compliance with this airworthiness directive, if any, may be obtained from the Engine Certification Office. (c) Special flight permits may be issued in accordance with FAR 21.197 and 21.199 to operate the airplane to a location where the requirements of this AD can be accomplished. (d) The replacement or rework of the engine fuel control shall be done in accordance with the following Textron Lycoming Alert Service Bulletin (ASB): Document No. Pages Version Date Textron Lycoming 1,2,4,5 Rev. 1 April 7, 1992 ASB A-ALF-502R 73-12 3,6,7,8 Original April 1, 1992 Total pages: 8This 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 Textron Lycoming, Stratford Division, 550 Main Street, Stratford, Connecticut 06497. Copies may be inspected at the FAA, Office of the Assistant Chief Counsel, 12 New England Executive Park, Burlington, Massachusetts; or at the Office of the Federal Register, 800 North Capitol Street, NW., Suite 700, Washington, DC 20001. (e) This amendment becomes effective on March 18, 1993, to all persons except those persons to whom it was made immediately effective by telegraphic AD T92-08-51, issued April 8, 1992, which contained the requirements of this amendment. ## Affected data sheets (1) (OpenAirDocs) The type certificate data sheets whose models the AD names. - [TCDS E6NE](https://openairdocs.org/tcds/E6NE): CFS Aeroproducts Inc.; names 5 of 12 models: ALF502R-6, ALF502R-3, ALF502R-5, ALF502R-3A, ALF502R-4 ## 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: 35 (0 by airframe model, 35 by engine model) - Makers: Canadair 25, British Aerospace 10 Models with the most aircraft: - [Lycoming ALF-502 SER. series](https://openairdocs.org/engine/lycoming-alf-502-ser-series): 25 aircraft (engine model) - [Honeywell ALF-502 series](https://openairdocs.org/engine/honeywell-alf-502-series): 4 aircraft (engine model) - [Lycoming ALF502R-5](https://openairdocs.org/engine/lycoming-alf502r-5): 4 aircraft (engine model) - [Honeywell ALF502R-5](https://openairdocs.org/engine/honeywell-alf502r-5): 2 aircraft (engine model) All 4 models: https://openairdocs.org/ad/92-08-51/models.md Every aircraft: https://openairdocs.org/ad/92-08-51/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.