# Pratt & Whitney JT4A-12 - Type: Engine model (FAA registry) - Registry code: 51722 - Manufacturer (registry): P & W - Model: JT4A-12 - Engine type: Turbo-jet - Power: 17,500 lb thrust - Data sheet: [TCDS E-291](https://openairdocs.org/tcds/E-291) (OpenAirDocs) - Holder: Pratt & Whitney Division - Installed in: 0 registered aircraft - Page: https://openairdocs.org/engine/pratt-whitney-jt4a-12 Model codes come from the FAA registry's reference file. ## ADs that may apply (OpenAirDocs) Matched to this engine model by model name and maker. Each AD's applicability may narrow it by serial number, part number or equipment. - [AD 76-01-08](https://openairdocs.org/ad/76-01-08): Tenth Stage Compressor Blade · Pratt & Whitney Division JT4A-10, JT4A-11, JT4A-12 and 3 more. Effective May 20, 1976 - [AD 71-06-03](https://openairdocs.org/ad/71-06-03): Twelfth Stage Compressor Rotor Disc · Pratt & Whitney Division JT4A-10, JT4A-11, JT4A-12 and 3 more. Effective May 19, 1971 - [AD 71-02-02](https://openairdocs.org/ad/71-02-02): Twelfth Stage Compressor Rotor Disc · Pratt & Whitney Division JT4A-10, JT4A-11, JT4A-12 and 3 more. Effective May 4, 1971 - [AD 68-12-03](https://openairdocs.org/ad/68-12-03): High Compressor Rotor Blade Failure · Pratt & Whitney Division JT4A-10, JT4A-11, JT4A-12 and 3 more. Effective Jun 12, 1968 - [AD 67-01-03](https://openairdocs.org/ad/67-01-03): Fuel Manifold Assembly · Pratt & Whitney Division JT4A-10, JT4A-11, JT4A-12 and 3 more. Effective Jan 5, 1967 - [AD 64-05-05](https://openairdocs.org/ad/64-05-05): Throttle Valve Assemblies · Pratt & Whitney Division JT3C-12, JT3C-7, JT3D-1 and 17 more. Effective Feb 27, 1964 - [AD 62-10-04](https://openairdocs.org/ad/62-10-04): Turbine Rotor Blades · Pratt & Whitney Division JT4A-10, JT4A-11, JT4A-12 and 3 more - [AD 56-06-02](https://openairdocs.org/ad/56-06-02): Cylinder Flange Attaching Stud · Pratt & Whitney Division Double Wasp CA15, Double Wasp CA17, Double Wasp CA18 and 115 more ## Registered aircraft None registered with this engine model now. ## NTSB investigations None matched to aircraft with this engine model. ## FAA accident and incident reports None matched to aircraft with this engine model. ## PMA parts (OpenAirDocs) (23) Current parts manufacturer approvals (PMA): parts the FAA has approved companies to make as replacements or modifications. Each record lists its models as free text; OpenAirDocs matched them to this engine model on its data sheet, so check the FAA record before relying on it. Newest first. - [234343WE](https://drs.faa.gov/browse/excelExternalWindow/CD3FA19ECE38FEA3862582280078870C.0001): Washer, Convex. Wencor LLC · PMA PQ1370NM · Replaces 234343 · Nov 19, 2017 - [9465A14](https://drs.faa.gov/browse/excelExternalWindow/D8E24FFCF2021F08862574F8006A9C13.0001): Main Fuel Pump. Goodrich Pump & Engine Control Systems Inc · PMA PQ0108NE · Replaces 482207 · Sep 10, 2002 - [9465A16](https://drs.faa.gov/browse/excelExternalWindow/CE443AA6D3A96739862574F8006AA0E6.0001): Main Fuel Pump. Goodrich Pump & Engine Control Systems Inc · PMA PQ0108NE · Replaces 725444 · Sep 10, 2002 - [50465A16](https://drs.faa.gov/browse/excelExternalWindow/2650334A6295FCF7862574F8006AA106.0001): Pump Assembly. Goodrich Pump & Engine Control Systems Inc · PMA PQ0108NE · Replaces 725444 · Sep 10, 2002 - [B00102-3](https://drs.faa.gov/browse/excelExternalWindow/E4A1C61D7BD5CA048525703E006B94F4.0001): Nut, Self locking, Dbl. Hex .190-32x.360. Bristol Industries · Replaces ST1183-09 · May 31, 2001 - [B00100-5](https://drs.faa.gov/browse/excelExternalWindow/A077C9C1899EB6C88525703E006B94F2.0001): Nut, Self locking, Dbl. Hex .3125-24x.359. Bristol Industries · Replaces ST1177-11 · May 31, 2001 - [B00102-4](https://drs.faa.gov/browse/excelExternalWindow/8B19A2262CBE0D0B8525703E006B94F5.0001): Nut, Self locking, Dbl. Hex .250-28x.416. Bristol Industries · Replaces ST1183-10 · May 31, 2001 - [B00102-5](https://drs.faa.gov/browse/excelExternalWindow/56BBFE3A0450850D8525703E006B94F6.0001): Nut, Self locking, Dbl. Hex .3125-24x.478. Bristol Industries · Replaces ST1183-11 · May 31, 2001 - [B00100-4](https://drs.faa.gov/browse/excelExternalWindow/207EEA159CC077F28525703E006B94F1.0001): Nut, Self locking, Dbl. Hex .250-28x.3215. Bristol Industries · Replaces 762643 · May 31, 2001 - [40534](https://drs.faa.gov/browse/excelExternalWindow/ABB92E869881049E8525704C005D113C.0001): Lead, ignition. Unison Industries · Replaces PWA 368159 · Jan 26, 1998 - [40535](https://drs.faa.gov/browse/excelExternalWindow/73D606A3224D4D988525704C005D113D.0001): Lead, ignition. Unison Industries · Replaces PWA 368158 · Jan 26, 1998 - [42721](https://drs.faa.gov/browse/excelExternalWindow/6994224F4ECEBAB08525704C005D1157.0001): Exciter, Ignition. Unison Industries · Replaces PWA 563586 · Jan 26, 1998 - [41540](https://drs.faa.gov/browse/excelExternalWindow/036ECCB7DC949C2D8525704C005D114A.0001): Exciter, Ignition. Unison Industries · Replaces PWA 477710 · Jan 26, 1998 - [234343WE](https://drs.faa.gov/browse/excelExternalWindow/1EF0DB40A136D42B8525704D00596898.0001): Washer. Wencor West Inc · Replaces Pratt & Whitney 234343 · Nov 6, 1996 - [TPM ltr and Computer Run](https://drs.faa.gov/browse/excelExternalWindow/FB43440C69C897EB8525704D00562318.0001): IAW TPM ltr dtd 3/1/85 and Computer Run, Job No J285 dtd 2/21/85 or later FAA approved revision. Turbo Power & Marine Sys Inc · Replaces Replacement of OEM parts · Jun 2, 1995 - [Turbo Power Parts List CPC Ref 84-032-1](https://drs.faa.gov/browse/excelExternalWindow/E755CACA9DC4B1CB8525704D0056231D.0001): IAW Turbo Power Parts List CPC Ref 84-032-1 dtd 5/25/84. Turbo Power & Marine Sys Inc · Replaces Replacement for original manufactured… · Jun 2, 1995 - [Turbo Power Parts Ltr](https://drs.faa.gov/browse/excelExternalWindow/C442C7D37E2A28B58525704D0056231E.0001): IAW Turbo Power Parts Ltr dtd 5/25/84 and attached Parts List. Turbo Power & Marine Sys Inc · Replaces Replacement for original manufactured… · Jun 2, 1995 - [Turbo Power Parts List CPC Ref 84-032-1](https://drs.faa.gov/browse/excelExternalWindow/203AACE3557CCFA68525704D0056231C.0001): IAW Turbo Power Parts List CPC Ref 84-032-1 dtd 2/8/84. Turbo Power & Marine Sys Inc · Replaces Replacement for original manufactured… · Jun 2, 1995 - [0270307](https://drs.faa.gov/browse/excelExternalWindow/3FCBB4973F9425DE8525704B00511C7D.0001): Igniter. SL Auburn Inc · Replaces 518366 · Dec 19, 1993 - [AA635-A](https://drs.faa.gov/browse/excelExternalWindow/CBF3F74A382F1EED8525703E006A33BB.0001): Igniter. Champion Aerospace LLC · Replaces P&W 464332 · Dec 6, 1988 - [P/N A.S.C. 207732 (PSW P/N 207732)](https://drs.faa.gov/browse/excelExternalWindow/E386714A628698F0862578F5004A9A99.0001): Seal Ring, Metal. Combustion Technologies · PMA PQ0885NE · Aug 4, 1988 - [AA72S-A](https://drs.faa.gov/browse/excelExternalWindow/84C77AFDD55C447B8525703E006A3178.0001): Igniter. Champion Aerospace LLC · Replaces P&W 487238 · Jun 26, 1988 - [023341-032](https://drs.faa.gov/browse/excelExternalWindow/64B0C965B5CA960B862574F600677447.0001): Pump, Fuel. Hamilton Sundstrand Corporation · PMA PQ2016CE · Sep 8, 1976 --- 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.