# Pratt & Whitney JT12A-6A

- Type: Engine model (FAA registry)
- Registry code: 51704
- Manufacturer (registry): P & W
- Model: JT12A-6A
- Engine type: Turbo-jet
- Power: 3,000 lb thrust
- Data sheet: [TCDS 1E9](https://openairdocs.org/tcds/1E9) (OpenAirDocs)
- Holder: Erickson Incorporated DBA Erickson Air-Crane
- Installed in: 0 registered aircraft
- Page: https://openairdocs.org/engine/pratt-whitney-jt12a-6a

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 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

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.

## Service difficulty reports (5)

As reported by operators and repair stations, by the model named in the report.

- [SDR WK42004F00001](https://openairdocs.org/sdr/WK42004F00001), Feb 10, 2004: TIRE. DAMAGED. CENTER TREAD CHUNKED AFTER 23 LANDINGS ON RT HAND TIRE.
- [SDR WK42004F00003](https://openairdocs.org/sdr/WK42004F00003), Feb 10, 2004: TIRE. DAMAGED. CENTER TREAD CHUNKED AFTER 23 LANDINGS ON RT TIRE. THE REVISION IS TO THE SN OF THE TIRE WHICH HAS THE DAMAGE TO IT. THE PREVIOUS SN WAS TO THE WHEEL ASSY ITSEL
- [SDR T2C2004F00000](https://openairdocs.org/sdr/T2C2004F00000), Feb 4, 2004: CASTING. CRACKED. DURING RUDDER RIGGING CHECK, FOUND CRACKED CASTING AT RUDDER PEDAL TORQUE TUBE SUPPORT, BELOW CO-PILOTS FLOOR. SUSPECT WIND GUST DAMAGE AS POSSIBLE CAUSE. ALSO 
- [SDR 2003FA0000661](https://openairdocs.org/sdr/2003FA0000661), Jun 23, 2003: SELECTOR VALVE. FAILED. MAIN LANDING GEAR DOOR SELECTOR VALVE FAILED CAUSING MAIN GEAR FAIRING DOORS TO REMAIN OPEN. THE LANDING GEAR UN-SAFE LIGHT REMAINED ON WITH GEAR UP. WITH MAIN 
- [SDR QQG2002F00000](https://openairdocs.org/sdr/QQG2002F00000), May 23, 2002: VALVE. INOPERATIVE. ANTI-ICE VALVE FAILED AFTER 62.9 HOURS, AFTER OVERHAUL. VALVE STUCK IN THE CLOSED POSITION. SINCE THERE WAS NO REPLACEMENT VALVES AVAILABLE, AND ATTEMPT WAS MAD

## PMA parts (OpenAirDocs) (193, 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
- [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
- [388505TMT](https://drs.faa.gov/browse/excelExternalWindow/CF3473818F5EEA06862574A6005C2149.0001): Housing. TMT Research Development Inc · PMA PQ3975CE · Replaces Pratt & Whitney 388505 · Oct 13, 2007
- [545073TMT](https://drs.faa.gov/browse/excelExternalWindow/4B30521F736E593286257552004CB9EE.0001): Adjuster. TMT Research Development Inc · PMA PQ3975CE · Replaces 545073 · Jul 4, 2007

All of them: https://openairdocs.org/engine/pratt-whitney-jt12a-6a/pma.md

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