# AD 88-17-01: Fuel Controls - Type: Airworthiness directive - Status: Current - Products: Rolls-Royce 250-B17, 250-B17B, 250-B17C, 250-B17D, 250-B17E, 250-B17F, 250-B17F/1, 250-B17F/2, 250-C20, 250-C20B, 250-C20C (T63-A-720), 250-C20F and 17 more - Effective: March 1, 1989 - Superseded by: Nothing supersedes this AD - Product type: Engine - Amendment: 39-6092 - Registered aircraft: 1,801 may be affected, by airframe or engine model (OpenAirDocs) - FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/466C373D38D84DBA862568400059D636.0001 - DRS record last changed: May 30, 2024 - Page: https://openairdocs.org/ad/88-17-01 ## The airworthiness directive 88-17-01 ALLISON GAS TURBINE DIVISION, GENERAL MOTORS CORPORATION (ALLISON): Amendment 39-6092. Final copy of Priority Letter AD 88-17-01 issued August 15, 1988. Applicability: Allison Model 250-B17, -C20, -C20R, and -C30 series engines, incorporating Bendix gas producer fuel controls listed in the attached appendix, installed in aircraft certificated in any category. Compliance: Required as indicated, unless already accomplished. To prevent possible engine over-temperature, loss of throttle response, or unscheduled power increase accomplish the following: (a) Remove from service within the next ten (10) operating hours after the effective date of this AD, the affected Bendix gas producer fuel controls listed by part number and serial number in the attached appendix and replace with a serviceable part. NOTES: (1) Out-of-service affected Bendix gas producer fuel controls, listed by part number and serial number in the attached appendix, may be returned to serviceupon the incorporation of Allison Alert Commercial Engine Bulletin (CEB) titled "Engine, Fuel and Control, Inspection of Certain Bendix Fuel Control Bellows Assemblies", dated August 1, 1988, with applicability as follows: ENGINE MODEL BULLETIN NUMBER 250-C20 Series CEB-A-1272 250-B17 Series TP CEB-A-1231 250-C30 Series CEB-A-73-3042 250-C20R Series CEB-A-73-4008 (2) Those affected Bendix gas producer fuel controls incorporating the above-cited Allison Alert CEB are identified by a green mark on the cylinder portion of the self-locking cap nut and either the letter "A" or the letter "B" in the "LESS ISSUE" block of the data plate. (b) Aircraft may be ferried in accordance with the provisions of FAR 21.197 and 21.199 to a base where this AD can be accomplished. (c) Upon request, an equivalent means of compliance with the requirements of this AD may be approved by the Manager, Chicago Aircraft Certification Office, Federal Aviation Administration, 2300 East Devon Avenue, Des Plaines, Illinois 60018. (d) Upon submission of substantiating data by an owner or operator through an FAA Airworthiness Inspector, the Manager, Chicago Aircraft Certification Office, may adjust the compliance time specified in this AD. Allison Alert CEB titled "Engine, Fuel and Control, Inspection of Certain Bendix Fuel Control Bellows Assemblies", dated August 1, 1988, identified and described in this document, 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 this document from the manufacturer may obtain copies upon request to Allison Gas Turbine Division, General Motors Corporation, P.O. Box 420, Indianapolis, Indiana 46206-0420. This document may also be examined at the Office of the Assistant Chief Council, Federal Aviation Administration, New England Region, 12 New England Executive Park, Burlington, Massachusetts 01803, Room 311, Rules Docket Number 88-ANE-32, between the hours of 8:00 a.m. and 4:30 p.m., Monday through Friday, except federal holidays. This amendment (39-6092, AD 88-17-01) becomes effective March 1, 1989, as to all persons except those persons to whom it was made immediately effective by individual Priority Letter AD 88-17-01 issued August 15, 1988, which contained this amendment. APPENDIX AD 88-17-01 Bendix Fuel Controls: Bendix Part No.: 2524644-26 (Allison 23033917) Serial No.: 87241174 87490092 88041524 88090122 87370001 88041515 88090107 88090124 * 87430041 88041516 88090110 88090125 87430042 88041517 88090112 88090126 * 87430044 88041518 88090114 88090128 87430045 88041519 88090116 88090129 87490081 88041520 88090118 88090130 87490082 88041521 88090119 88090131 87490083 88041522 88090120 87490084 88041523 88090121 Bendix Part No.: 2524654-23 (Allison 23036660) Serial No.: 87251235 87460078 Bendix Part No.: 2524886-10 (Allison 23033919) Serial No.: 87430052 87430055 87490102 87430053 87490101 87490104 Bendix Part No: 2524922-6 (Allison 23033849) Serial No.: 87370010 88090143 88090144 Bendix Part No.: 2524957-3 (Allison 23030614) Serial No.: 84250105 Bendix Part No.: 2524986-2 (Allison 23038954) Serial No.: 87490095 87490098 Bendix Part No.: 2549032-2 (Allison 23037275) Serial No.: 87430056 87430063 88090154 88090163 87430057 87430065 88090155 88090165 87430059 88090147 88090156 88090166 87430060 88090149 88090157 88130236 87430061 88090151 88090158 88130249 87430062 88090152 88090160 88130250 *These Serial Nos. corrected from Priority Letter AD 88-17-01 by this Final Rule. ## Affected data sheets (3) (OpenAirDocs) The type certificate data sheets whose models the AD names. - [TCDS E4CE](https://openairdocs.org/tcds/E4CE): Rolls-Royce Corporation; names 11 of 23 models: 250-C20, 250-C20S, 250-C20C (T63-A-720), 250-C20R/4, 250-C20F, 250-C20R/2, 250-C20W, 250-C20J… - [TCDS E1GL](https://openairdocs.org/tcds/E1GL): Rolls-Royce Corporation; names 10 of 23 models: 250-C30, 250-C30R (T703-AD-700), 250-C30R/1 (T703-AD-700B), 250-C30U, 250-C30R/3, 250-C30S, 250-C30G, 250-C30P… - [TCDS E10CE](https://openairdocs.org/tcds/E10CE): Rolls-Royce Corporation; names 8 of 11 models: 250-B17F, 250-B17F/1, 250-B17B, 250-B17F/2, 250-B17E, 250-B17C, 250-B17D, 250-B17 ## 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: 1,801 (0 by airframe model, 1,801 by engine model) - Makers: Bell 915, Hughes Helicopters 152, MD Helicopters 130, Bell Helicopter Textron Canada 114, Mcdonnell Douglas Helicopter 96, Enstrom Helicopter 60, Bell Helicopter Textron 51, Hughes 36, Agusta 29, Hiller 23 Models with the most aircraft: - [Allison 250-C20 series](https://openairdocs.org/engine/allison-250-c20-series): 530 aircraft (engine model) - [Allison 250-C30 series](https://openairdocs.org/engine/allison-250-c30-series): 224 aircraft (engine model) - [Rolls-Royce 250-C20B](https://openairdocs.org/engine/rolls-royce-250-c20b): 215 aircraft (engine model) - [Rolls-Royce 250-C30P](https://openairdocs.org/engine/rolls-royce-250-c30p): 152 aircraft (engine model) - [Allison 250-C20B](https://openairdocs.org/engine/allison-250-c20b): 113 aircraft (engine model) - [Rolls-Royce 250-C20J](https://openairdocs.org/engine/rolls-royce-250-c20j): 82 aircraft (engine model) - [Allison 250 series](https://openairdocs.org/engine/allison-250-series): 79 aircraft (engine model) - [Rolls-Royce 250-C30](https://openairdocs.org/engine/rolls-royce-250-c30): 76 aircraft (engine model) - [Allison 250-C20](https://openairdocs.org/engine/allison-250-c20): 54 aircraft (engine model) - [Rolls-Royce 250-C20W](https://openairdocs.org/engine/rolls-royce-250-c20w): 51 aircraft (engine model) - [Rolls-Royce 250-C20](https://openairdocs.org/engine/rolls-royce-250-c20): 42 aircraft (engine model) - [Allison 250-C30P](https://openairdocs.org/engine/allison-250-c30p): 25 aircraft (engine model) - [Rolls-Royce 250-C20R/2](https://openairdocs.org/engine/rolls-royce-250-c20r-2): 24 aircraft (engine model) - [Allison 250-C20J](https://openairdocs.org/engine/allison-250-c20j): 16 aircraft (engine model) - [Allison 250-B17 series](https://openairdocs.org/engine/allison-250-b17-series): 14 aircraft (engine model) - [Rolls-Royce 250-B17F](https://openairdocs.org/engine/rolls-royce-250-b17f): 10 aircraft (engine model) - [Allison 250-C20C](https://openairdocs.org/engine/allison-250-c20c): 9 aircraft (engine model) - [Allison 250-C20R/2](https://openairdocs.org/engine/allison-250-c20r-2): 8 aircraft (engine model) - [Rolls-Royce 250-B17F/2](https://openairdocs.org/engine/rolls-royce-250-b17f-2): 8 aircraft (engine model) - [Allison 250-B17C](https://openairdocs.org/engine/allison-250-b17c): 6 aircraft (engine model) All 45 models: https://openairdocs.org/ad/88-17-01/models.md Every aircraft: https://openairdocs.org/ad/88-17-01/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.