# AD 77-17-08: Fuel Regulator P1 Multiplier Lever - Type: Airworthiness directive - Status: Current - Products: Honeywell International T53-L-703, T5307A, T5309A, T5309B, T5309C, T5311A, T5311B, T5313A, T5313B and T5317A - Effective: March 30, 1978 - Published: March 30, 1978 - Issued: March 30, 1978 - Superseded by: Nothing supersedes this AD - Product type: Engine - Amendment: 39-3165 - Registered aircraft: 150 may be affected, by airframe or engine model (OpenAirDocs) - FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/202CDA029619BC5086256E120047714B.0001 - DRS record last changed: November 21, 2025 - Page: https://openairdocs.org/ad/77-17-08 ## The airworthiness directive 77-17-08 AVCO LYCOMING: Amendment 39-3019 as amended by Amendment 39-3165. Applies to all Avco Lycoming T53 series engines. Compliance for P/Ns 1-170-240-52, 1-170-240-58, and 1-170-240-59 is required by September 15, 1977. Compliance for remaining part numbers listed below is required by May 1, 1978. To preclude possible failure of the fuel regulator P1 multiplier lever resulting in flameout of the engine, perform the following in accordance with Avco Lycoming Service Bulletin No. 0048, Revision 1, dated March 15, 1978, or later revision approved by the Chief, Engineering and Manufacturing Branch, FAA, New England Region: 1. Fill the fuel regulator P1 multiplier cavity with silicone oil, General Electric P/N SF96-100, or equivalent. 2. Reidentify the fuel regulator, from P/N 1-170-240-52 to P/N 1-170-240-61, or from P/N 1-170-240-58 to P/N 1-170-240-60, or from P/N 1-170-240-59 to P/N 1-170-240-62. From P/N To P/N 1-160-840-01 1-160-840-15 1-160-840-02 1-160-840-14 1-160-840-03 1-160-840-13 1-160-840-09 1-160-840-11 1-160-840-10 1-160-840-12 1-160-950-02 1-160-950-16 1-160-950-04 1-160-950-15 1-160-950-05 1-160-950-17 1-160-950-06 1-160-950-18 1-160-950-08 1-160-950-19 1-160-950-10 1-160-950-13 1-160-950-12 1-160-950-14 1-170-240-01 1-170-240-68 1-170-240-03 1-170-240-69 1-170-240-04 1-170-240-70 1-170-240-05 1-170-240-71 1-170-240-06 1-170-240-72 1-170-240-08 1-170-240-73 1-170-240-09 1-170-240-74 1-170-240-12 1-170-240-75 1-170-240-17 1-170-240-76 1-170-240-19 1-170-240-77 1-170-240-20 1-170-240-78 1-170-240-21 1-170-240-64 1-170-240-25 1-170-240-79 1-170-240-26 1-170-240-80 1-170-240-27 1-170-240-81 1-170-240-30 1-170-240-82 1-170-240-45 1-170-240-63 1-170-240-46 1-170-240-83 1-170-240-47 1-170-240-84 1-170-240-48 1-170-240-67 1-170-240-49 1-170-240-65 1-170-240-57 1-170-240-66 The manufacturer's Service Bulletin identified and described in this directive is incorporated herein and made a part hereof pursuant to 5 U.S.C. 552(a)(1). All persons affected by this directive who have not already received these documents from the manufacturer may obtain copies upon request to Avco Lycoming Division, 550 South Main Street, Stratford, Connecticut 06497. These documents may also be examined at Federal Aviation Administration, New England Region, 12 New England Executive Park, Burlington, Massachusetts 01803, and at FAA Headquarters, 800 Independence Avenue S.W., Washington, D.C. A historical file on this A.D. which includes the incorporated material in full is maintained by the FAA at its Headquarters in Washington, D.C., and at New England Region. Amendment 39-3019 became effective August 31, 1977. This amendment 39-3165 becomes effective March 30, 1978. ## Affected data sheets (3) (OpenAirDocs) The type certificate data sheets whose models the AD names. - [TCDS E1EA](https://openairdocs.org/tcds/E1EA): Ozark Aeroworks LLC; names 5 of 5 models: T5309B, T5309A, T5311A, T5311B, T5309C - [TCDS E17EA](https://openairdocs.org/tcds/E17EA): Ozark Aeroworks LLC; names 3 of 6 models: T5313B, T5317A, T5313A - [TCDS E8EA](https://openairdocs.org/tcds/E8EA): Ozark Aeroworks LLC; names 1 of 1 models: T5307A ## 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: 150 (0 by airframe model, 150 by engine model) - Makers: Bell 113, Garlick Helicopters 8, Grumman 4, Kaman Aerospace 3, Southwest Florida 3, Bell Helicopter Textron 2, Kaman 2, Western International Avia 2, Williams Helicopter 2, Anderson Douglas 1 Models with the most aircraft: - [Lycoming T-53 series](https://openairdocs.org/engine/lycoming-t-53-series): 95 aircraft (engine model) - [Honeywell T53-L-703](https://openairdocs.org/engine/honeywell-t53-l-703): 17 aircraft (engine model) - [Honeywell T5317A](https://openairdocs.org/engine/honeywell-t5317a): 11 aircraft (engine model) - [Honeywell T5317 series](https://openairdocs.org/engine/honeywell-t5317-series): 9 aircraft (engine model) - [Lycoming T5313B](https://openairdocs.org/engine/lycoming-t5313b): 8 aircraft (engine model) - [Honeywell T5313B](https://openairdocs.org/engine/honeywell-t5313b): 5 aircraft (engine model) - [Lycoming T5311B](https://openairdocs.org/engine/lycoming-t5311b): 2 aircraft (engine model) - [Lycoming T5317A](https://openairdocs.org/engine/lycoming-t5317a): 2 aircraft (engine model) - [Honeywell T5309B](https://openairdocs.org/engine/honeywell-t5309b): 1 aircraft (engine model) All 11 models: https://openairdocs.org/ad/77-17-08/models.md Every aircraft: https://openairdocs.org/ad/77-17-08/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.