# Pratt & Whitney JT12A series - Type: Engine model (FAA registry) - Registry code: 52056 - Manufacturer (registry): P & W - Model: JT12A SERIES - Engine type: Turbo-jet - Power: 1,320 lb thrust - Data sheet: [TCDS 1E9](https://openairdocs.org/tcds/1E9) (OpenAirDocs) - Holder: Erickson Incorporated DBA Erickson Air-Crane - Installed in: 3 registered aircraft - Page: https://openairdocs.org/engine/pratt-whitney-jt12a-series The registry names only the engine series, so ADs for every model in the series are matched. ## 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 71-24-05](https://openairdocs.org/ad/71-24-05): Compressor Rotor Discs · Pratt & Whitney Division JFTD12A-4A (T73P-1), JFTD12A-5A (T73-P-700), JT12A-6 and 2 more. Effective May 31, 1974 - [AD 71-17-06](https://openairdocs.org/ad/71-17-06): Stage 2, 3, 7 and 8 Compressor Rotor Discs · Pratt & Whitney Division J60-P-5B, JT12A-6, JT12A-6A and 1 more. Effective Aug 17, 1971 - [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 (3) - [N179EP](https://openairdocs.org/aircraft/N179EP): [Ff29 LLC](https://openairdocs.org/faa-owner/FF29%20LLC), [Park City, UT](https://openairdocs.org/faa-place/UT/Park%20City), built 1965, S/N 591699 - [N39RG](https://openairdocs.org/aircraft/N39RG): [Tulsa Technology Center School District No 18](https://openairdocs.org/faa-owner/TULSA%20TECHNOLOGY%20CENTER%20SCHOOL%20DISTRICT%20NO%2018), [Tulsa, OK](https://openairdocs.org/faa-place/OK/Tulsa), built 1966, S/N 28282 - [N5959L](https://openairdocs.org/aircraft/N5959L): [Surfs Up Aero LLC](https://openairdocs.org/faa-owner/SURFS%20UP%20AERO%20LLC), [Wilmington, DE](https://openairdocs.org/faa-place/DE/Wilmington), built 1965, S/N 0909 ## NTSB investigations (3) 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 LAX06GA254](https://openairdocs.org/ntsb/LAX06GA254), Aug 5, 2006: Aviation International Rotors CH-54A (N6156U), Happy Camp, CA, substantial damage, 2 fatal. Probable cause: The fatigue failure of tail rotor blade spindle, which resulted in the separation of the blade and tail rotor gearbox. - [NTSB SEA97LA011](https://openairdocs.org/ntsb/SEA97LA011), Oct 11, 1996: Aero Vodochody Aero. Works L-29 (N7150A), Tillamook, OR, destroyed, 2 fatal. Probable cause: failure of the pilot to maintain control of the aircraft, while maneuvering behind an F4F aircraft. The lack of altitude for a recovery was a related factor. - [NTSB CHI92LA181](https://openairdocs.org/ntsb/CHI92LA181), Jun 17, 1992: North American NA-265-50 (N50CR), Cedar Rapids, IA, substantial damage. Probable cause: THE PILOT-IN-COMMAND'S SELECTION OF THE WRONG RUNWAY FOR LANDING. A FACTOR WAS THE TAILWIND. ## FAA accident and incident reports (4) From the FAA Accident/Incident Data System. Reports are matched to registry aircraft by N-number and event date, checked against the reported make and model; the registry's history has gaps, so older matches can be wrong. Compare the reported make and model. - [Accident 20060804014979A](https://openairdocs.org/incident/20060804014979A), Aug 4, 2006: Skrsky CH54A (N6156U), Happy Camp, CA, Destroyed, 2 fatal. (-23) On August 04, 2006, at 1947 hours PDT, a SK-65-CH54A, N6156U, was destroyed, while hovering over the klamath river. During transition into climb, the… - [Incident 20060704016319I](https://openairdocs.org/incident/20060704016319I), Jul 4, 2006: Aerovd L29 (N179EP), Riverside, CA, Minor damage. (-23) The forward canopy departed from the aircraft in flight. While climbing, @ 5500 feet, the pilot in command (PIC) noticed the cockpit pressurization… - [Accident 19961011036959A](https://openairdocs.org/incident/19961011036959A), Oct 11, 1996: N7150A, Tillamook, OR, Destroyed, 2 fatal. Photo flight flew into wake of F4F photo target. Lost control rolled. Failed timely pullout from resulting dive. - [Accident 19920617020759A](https://openairdocs.org/incident/19920617020759A), Jun 17, 1992: Rkwell NA265 (N50CR), Cedar Rapids, IA, Substantial damage. Overshot runway landing in strong tailwind. Impacted elevated service road test flight for IFR. Instruments. ## PMA parts (OpenAirDocs) (201, first 50) 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. - [80888TMT](https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID196237341020260616140917.0001): Gear, Driver – Control. Source Manufacturing Inc · PMA PQ1549CE · Replaces 80888 · Apr 10, 2026 - [745112TMT](https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID194317500420260616140917.0001): Rivet–Split, Fillister. Source Manufacturing Inc · PMA PQ1549CE · Replaces 745112 · Apr 10, 2026 - [71080TMT](https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID189780568720260616140915.0001): Washer, Key. Source Manufacturing Inc · PMA PQ1549CE · Replaces 71080 · Apr 10, 2026 - [560890TMT](https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID188247252220260616140913.0001): Seal, Air – 1st Stage Turbine. Source Manufacturing Inc · PMA PQ1549CE · Replaces 560890 · Apr 10, 2026 - [370915TMT, 370915-05TMT, 370915-10TMT, 370915-15TMT](https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID182531854620260616140912.0001): Spacer, Sleeve. Source Manufacturing Inc · PMA PQ1549CE · Replaces 370915 · Apr 10, 2026 - [406123TMT, 406123-05TMT, 406123-10TMT, 406123-15TMT](https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID180036331320260616140913.0001): Spacer, Sleeve. Source Manufacturing Inc · PMA PQ1549CE · Replaces 406123 · Apr 10, 2026 - [491975TMT](https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID179798830320260616140915.0001): Washer. Source Manufacturing Inc · PMA PQ1549CE · Replaces 491975 · Apr 10, 2026 - [446-3-90TMT](https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID178360562220260616140916.0001): Screw, Machine – Flathead. Source Manufacturing Inc · PMA PQ1549CE · Replaces 446-3-90 · Apr 10, 2026 - [406119TMT, 406119-05TMT, 406119-10TMT, 406119-15TMT](https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID175682255220260616140912.0001): Spacer, Sleeve. Source Manufacturing Inc · PMA PQ1549CE · Replaces 406119 · Apr 10, 2026 - [80890TMT](https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID167266528020260616140917.0001): Shaft, Control Drive Gear. Source Manufacturing Inc · PMA PQ1549CE · Replaces 80890 · Apr 10, 2026 - [390940TMT](https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID166143657520260616140915.0001): Gearshaft, Main Oil Pump. Source Manufacturing Inc · PMA PQ1549CE · Replaces 390940 · Apr 10, 2026 - [586986TMT](https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID157738458620260616140910.0001): Valve, Fuel Dump. Source Manufacturing Inc · PMA PQ1549CE · Replaces 586986 · Apr 10, 2026 - [388505TMT](https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID155399131420260616140914.0001): Adjuster Housing. Source Manufacturing Inc · PMA PQ1549CE · Replaces 388505 · Apr 10, 2026 - [373221TMT](https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID155001386020260616140910.0001): Plug, Guide. Source Manufacturing Inc · PMA PQ1549CE · Replaces 373221 · Apr 10, 2026 - [370779TMT](https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID153540178020260616140911.0001): Washer, Key. Source Manufacturing Inc · PMA PQ1549CE · Replaces 370779 · Apr 10, 2026 - [586987TMT](https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID153079269020260616140911.0001): Strip, Extension – Fuel Dump Valve. Source Manufacturing Inc · PMA PQ1549CE · Replaces 586987 · Apr 10, 2026 - [695847TMT](https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID148803224420260616140914.0001): Stator, Fuel Nozzle. Source Manufacturing Inc · PMA PQ1549CE · Replaces 695847 · Apr 10, 2026 - [397229TMT](https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID143631943920260616140911.0001): Spring, Helical Compression. Source Manufacturing Inc · PMA PQ1549CE · Replaces 397229 · Apr 10, 2026 - [384240TMT](https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID140794862620260616140909.0001): Liner. Source Manufacturing Inc · PMA PQ1549CE · Replaces 384240 · Apr 10, 2026 - [80904TMT](https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID126014310520260616140916.0001): Washer, Thrust. Source Manufacturing Inc · PMA PQ1549CE · Replaces 80904 · Apr 10, 2026 - [370917TMT, 370917-05TMT, 370917-10TMT, 370917-15TMT](https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID125200865820260616140912.0001): Spacer, Sleeve. Source Manufacturing Inc · PMA PQ1549CE · Replaces 370917 · Apr 10, 2026 - [545073TMT](https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID120704003420260616140914.0001): Adjuster. Source Manufacturing Inc · PMA PQ1549CE · Replaces 545073 · Apr 10, 2026 - [71078TMT](https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID119886479520260616140913.0001): Impeller Assembly, Shaft and Pin. Source Manufacturing Inc · PMA PQ1549CE · Replaces 71078 · Apr 10, 2026 - [407395TMT](https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID117839264120260616140915.0001): Washer, Key. Source Manufacturing Inc · PMA PQ1549CE · Replaces 407395 · Apr 10, 2026 - [49902TMT](https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID107187630520260616140915.0001): Gear, Impeller Driven. Source Manufacturing Inc · PMA PQ1549CE · Replaces 49902 · Apr 10, 2026 - [384249TMT](https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID106832901220260616140910.0001): Valve Assembly. Source Manufacturing Inc · PMA PQ1549CE · Replaces 384249 · Apr 10, 2026 - [414471TMT](https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID106828924920260616140916.0001): Pin. Source Manufacturing Inc · PMA PQ1549CE · Replaces 414471 · Apr 10, 2026 - [586989TMT](https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID104968989020260616140911.0001): Spring, Garter – Fuel Dump Valve. Source Manufacturing Inc · PMA PQ1549CE · Replaces 586989 · Apr 10, 2026 - [394809TMT](https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID104597897620260616140914.0001): Spacer Seal. Source Manufacturing Inc · PMA PQ1549CE · Replaces 394809 · Apr 10, 2026 - [370916TMT, 370916-05TMT, 370916-10TMT, 370916-15TMT](https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID100260108120260616140912.0001): Spacer, Sleeve. Source Manufacturing Inc · PMA PQ1549CE · Replaces 370916 · Apr 10, 2026 - [80884TMT](https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID100162069420260616140916.0001): Shaft, Main Drive. Source Manufacturing Inc · PMA PQ1549CE · Replaces 80884 · Apr 10, 2026 - [3036376GF](https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID187641607320230829140955.0001): Filter Element. Global Filtration, Inc. · PMA PQ0993SW · Replaces Pratt and Whitney Canada Corp… · May 19, 2023 - [370077AA](https://drs.faa.gov/browse/excelExternalWindow/A3BF0CF5444E6F11862580CE00749445.0001): Bearing. Able Aerospace Services, Inc. · PMA PQ2487NM · Replaces 370077 · Feb 1, 2017 - [668725AA](https://drs.faa.gov/browse/excelExternalWindow/A3B359745C596D3D862580CE007494A1.0001): Seal. Able Aerospace Services, Inc. · PMA PQ2487NM · Replaces 668725 · Feb 1, 2017 - [547559AA](https://drs.faa.gov/browse/excelExternalWindow/9BE81050B0084DE7862580CE007494A0.0001): Bumper. Able Aerospace Services, Inc. · PMA PQ2487NM · Replaces 547559 · Feb 1, 2017 - [547559AA](https://drs.faa.gov/browse/excelExternalWindow/84293E5DDAC7669D86257FAE006ADFC2.0001): Bumper. Able Engineering and Component Services, Inc. · PMA PQ2487NM · Replaces 547559 · Feb 1, 2017 - [370077AA](https://drs.faa.gov/browse/excelExternalWindow/72540DB1300F83EC86257FAE006ADF8B.0001): Bearing. Able Engineering and Component Services, Inc. · PMA PQ2487NM · Replaces 370077 · Feb 1, 2017 - [668725AA](https://drs.faa.gov/browse/excelExternalWindow/435A2A0EBAD9F36D86257FAE006ADFC4.0001): Seal. Able Engineering and Component Services, Inc. · PMA PQ2487NM · Replaces 668725 · Feb 1, 2017 - [80890TMT](https://drs.faa.gov/browse/excelExternalWindow/9ED2464D45F0AD5A862579A0005E5B5F.0001): Shaft, Control Drive Gear. TMT Research Development Inc · PMA PQ3975CE · Replaces 80890 · Dec 26, 2011 - [80888TMT](https://drs.faa.gov/browse/excelExternalWindow/B6B2EFD625A5D1218625799F006D1E2F.0001): Gear, Driver-Control. TMT Research Development Inc · PMA PQ3975CE · Replaces 80888 · Nov 8, 2011 - [745112TMT](https://drs.faa.gov/browse/excelExternalWindow/9FF112045998D6F88625799F006D1DF4.0001): Rivet-Split, Fillister. TMT Research Development Inc · PMA PQ3975CE · Replaces 745112 · Nov 8, 2011 - [745112TMT](https://drs.faa.gov/browse/excelExternalWindow/FDE18028E8763CBE8625799F006D1E66.0001): Rivet-Split, Fillister. TMT Research Development Inc · PMA PQ3975CE · Replaces 745112 · Oct 5, 2011 - [80888TMT](https://drs.faa.gov/browse/excelExternalWindow/DA01DF997287987B8625799F006D1E98.0001): Gear, Driver-Control. TMT Research Development Inc · PMA PQ3975CE · Replaces 80888 · Oct 5, 2011 - [80884TMT](https://drs.faa.gov/browse/excelExternalWindow/F46F23518AC6D39B86257910006413D0.0001): Shaft, Main Drive. TMT Research Development Inc · PMA PQ3975CE · Replaces 80884 · Jul 18, 2011 - [732056-7WD](https://drs.faa.gov/browse/excelExternalWindow/35A76672D4E811F6862578A9004EA388.0001): Roller, Hollow. Wencor LLC (formerly Dixie Aerospace LLC) · PMA PQ1630CE · Replaces Hamilton Sundstrand 732056-7 · Apr 13, 2011 - [80904TMT](https://drs.faa.gov/browse/excelExternalWindow/E150B228285F0344862577A400569753.0001): Washer, Thrust. TMT Research Development Inc · PMA PQ3975CE · Replaces 80904 · Jun 2, 2010 - [414471TMT](https://drs.faa.gov/browse/excelExternalWindow/BC68850E7C51B9E986257736006F365D.0001): Pin. TMT Research Development Inc · PMA PQ3975CE · Replaces 414471 · Mar 10, 2010 - [446-3-90TMT](https://drs.faa.gov/browse/excelExternalWindow/6B37474A72A7FB1D86257736006F3688.0001): Screw - Machine - Flathead. TMT Research Development Inc · PMA PQ3975CE · Replaces 446-3-90 · Mar 10, 2010 - [390940TMT](https://drs.faa.gov/browse/excelExternalWindow/7741F9D353CC1F4A86257632006B606A.0001): Gearshaft, Main Oil Pump. TMT Research Development Inc · PMA PQ3975CE · Replaces 390940 · Jun 8, 2009 - [71080TMT](https://drs.faa.gov/browse/excelExternalWindow/D07ADDDC55587B22862575C4006725A6.0001): Washer, Key. TMT Research Development Inc · PMA PQ3975CE · Replaces Chandler Evans 71080 · Mar 9, 2009 All of them: https://openairdocs.org/engine/pratt-whitney-jt12a-series/pma.md --- 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.