# AD 92-12-10: TEXTRON LYCOMING Model TIO-540-S1AD Engines - Type: Airworthiness directive - Status: Historical - Products: Lycoming Engines TIO-540-S1AD - Effective: June 5, 1992 - Superseded by: [AD 93-05-22](https://openairdocs.org/ad/93-05-22) - Product type: Engine - Docket: 92-ANE-27 - Registered aircraft: 5,090 may be affected, by airframe or engine model (OpenAirDocs) - FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/1CEAC5AFA4E461F38625684A005E5638.0001 - DRS record last changed: August 7, 2025 - Page: https://openairdocs.org/ad/92-12-10 ## The airworthiness directive 92-12-10 TEXTRON LYCOMING: Priority Letter issued on June 5, 1992. Docket No. 92-ANE-27 Applicability: Textron Lycoming Model TIO-540-S1AD engines installed on but not limited to Piper PA-32 Series Aircraft (Turbo Saratoga, Turbo Saratoga SP and Turbo Lance II aircraft). Compliance: Required as indicated, unless accomplished previously. To prevent failure of the fuel injector lines that can result in engine fire, accomplish the following: (a) Within 10 hours after the effective date of this AD inspect the fuel injector fuel lines between the fuel manifold and the fuel injector nozzles as follows: (1) Visually inspect each fuel injector fuel line for missing support clamps or support clamps with a loose, worn or missing support sleeve or cushion. Each fuel injector fuel line must be supported by at least one clamp. (2) Visually inspect each fuel injector fuel line for evidence of physical damage, including dents and chaffing, and for stains caused by fuel leakage. (b) Prior to further flight, replace any fuel injector fuel line that does not have a supporting clamp, has a clamp with a loose, worn, or missing support sleeve or cushion, or if the line itself is damaged or has evidence of fuel leakage. (c) After the effective date of this AD, reinspect the fuel lines in accordance with paragraphs (a)(1) and (2) of this AD and replace as necessary any fuel injector fuel lines in accordance with paragraph (b) of this AD at each annual inspection, at each 100-hour inspection, at each engine overhaul, and after any maintenance has been performed on the engine where the fuel injector fuel lines have been disconnected or disturbed. (d) 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, New York Aircraft Certification Office, ANE-170, 180 South Franklin Street, Valley Stream, New York. The request should be forwarded through an appropriate FAA Principal Maintenance Inspector, who may add comments and then send it to the Manager, New York Aircraft Certification Office. NOTE: Information concerning the existence of approved alternative methods of compliance with this airworthiness directive, if any, may be obtained from the New York Aircraft Certification Office. (f) 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. (g) Copies of the applicable service information may be obtained from Textron Lycoming, Williamsport, Pennsylvania. This information may be examined at the FAA, New England Region, Office of the Assistant Chief Counsel, 12 New England Executive Park, Burlington, Massachusetts 01803-5299. (h) Priority letter AD 92-12-10, issued June 5, 1992, becomes effective upon receipt. ## Affected data sheets (1) (OpenAirDocs) The type certificate data sheets whose models the AD names. - [TCDS E14EA](https://openairdocs.org/tcds/E14EA): Lycoming Engines; names 1 of 40 models: TIO-540-S1AD ## 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: 5,090 (0 by airframe model, 5,090 by engine model) - Makers: Piper 3,663, Cessna 631, Mooney 222, Aero Commander 117, Bellanca 111, Smith 98, Rockwell International 92, Socata 51, Commander 21, Aerofab 17 Models with the most aircraft: - [Lycoming TI0-540 series](https://openairdocs.org/engine/lycoming-ti0-540-series): 4,886 aircraft (engine model) - [Lycoming TIO-540 series](https://openairdocs.org/engine/lycoming-tio-540-series): 191 aircraft (engine model) - [Lycoming TIO-540-S1AD](https://openairdocs.org/engine/lycoming-tio-540-s1ad): 13 aircraft (engine model) All 4 models: https://openairdocs.org/ad/92-12-10/models.md Every aircraft: https://openairdocs.org/ad/92-12-10/aircraft.md ## Related documents - [AD 93-05-22](https://openairdocs.org/ad/93-05-22) (historical): Fuel Injector Fuel Lines ยท Lycoming Engines TIO-540-S1AD. Effective May 11, 1993. Supersedes this AD Its text cites no advisory circulars or STCs. ## NTSB investigations that cite this AD (1) From the NTSB's public API. Aircraft are matched to registry aircraft by N-number and event date, checked against the reported serial number, make and model; the registry's history has gaps, so older matches can be wrong. Compare the reported make and model. - [NTSB BFO92LA083](https://openairdocs.org/ntsb/BFO92LA083), Jul 1, 1992: Piper PA-32R-301T (N8141H), Greenville, VA, substantial damage. Probable cause: THE FATIGUE FAILURE OF THE FUEL INJECTOR FUEL LINE RESULTING IN ENGINE FAILURE. CONTRIBUTING TO THE ACCIDENT WAS THE UNSUITABLE TERRAIN IN WHICH THE FORCED LANDING WAS MADE. --- 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.