# Pratt & Whitney JFTD12A series - Type: Engine model (FAA registry) - Registry code: 52047 - Manufacturer (registry): P & W - Model: JFTD12A SER - Engine type: Turbo-shaft - Power: 4,500 hp - Data sheet: [TCDS E15EA](https://openairdocs.org/tcds/E15EA) (OpenAirDocs) - Holder: Erickson Incorporated DBA Erickson Air-Crane - Installed in: 15 registered aircraft - Page: https://openairdocs.org/engine/pratt-whitney-jftd12a-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 97-02-13](https://openairdocs.org/ad/97-02-13): Disk rupture · Pratt & Whitney Division JFTD12A-4A (T73P-1) and JFTD12A-5A (T73-P-700). Effective Apr 4, 1997 - [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 ## Registered aircraft (15) - [N154AC](https://openairdocs.org/aircraft/N154AC): [Helicopter Express LLC](https://openairdocs.org/faa-owner/HELICOPTER%20EXPRESS%20LLC), [Chamblee, GA](https://openairdocs.org/faa-place/GA/Chamblee), built 1967, S/N 64037 - [N159AC](https://openairdocs.org/aircraft/N159AC): [Helicopter Express LLC](https://openairdocs.org/faa-owner/HELICOPTER%20EXPRESS%20LLC), [Chamblee, GA](https://openairdocs.org/faa-place/GA/Chamblee), built 1970, S/N 64084 - [N179AC](https://openairdocs.org/aircraft/N179AC): [Helicopter Express LLC](https://openairdocs.org/faa-owner/HELICOPTER%20EXPRESS%20LLC), [Chamblee, GA](https://openairdocs.org/faa-place/GA/Chamblee), built 1970, S/N 64091 - [N194AC](https://openairdocs.org/aircraft/N194AC): [Helicopter Express LLC](https://openairdocs.org/faa-owner/HELICOPTER%20EXPRESS%20LLC), [Chamblee, GA](https://openairdocs.org/faa-place/GA/Chamblee), built 1967, S/N 64017 - [N218AC](https://openairdocs.org/aircraft/N218AC): [Helicopter Express LLC](https://openairdocs.org/faa-owner/HELICOPTER%20EXPRESS%20LLC), [Chamblee, GA](https://openairdocs.org/faa-place/GA/Chamblee), built 1967, S/N 64033 - [N4035S](https://openairdocs.org/aircraft/N4035S): [Siller Helicopters LLC](https://openairdocs.org/faa-owner/SILLER%20HELICOPTERS%20LLC), [Chamblee, GA](https://openairdocs.org/faa-place/GA/Chamblee), built 1975, S/N 64099 - [N4037S](https://openairdocs.org/aircraft/N4037S): [Siller Helicopters LLC](https://openairdocs.org/faa-owner/SILLER%20HELICOPTERS%20LLC), [Chamblee, GA](https://openairdocs.org/faa-place/GA/Chamblee), built 1975, S/N 64101 - [N623HX](https://openairdocs.org/aircraft/N623HX): [Siller Helicopters LLC](https://openairdocs.org/faa-owner/SILLER%20HELICOPTERS%20LLC), [Chamblee, GA](https://openairdocs.org/faa-place/GA/Chamblee), built 1994, S/N 66-18411 - [N625HX](https://openairdocs.org/aircraft/N625HX): [Helicopter Express LLC](https://openairdocs.org/faa-owner/HELICOPTER%20EXPRESS%20LLC), [Chamblee, GA](https://openairdocs.org/faa-place/GA/Chamblee), built 1968, S/N 64034D - [N630HX](https://openairdocs.org/aircraft/N630HX): [Helicopter Express LLC](https://openairdocs.org/faa-owner/HELICOPTER%20EXPRESS%20LLC), [Chamblee, GA](https://openairdocs.org/faa-place/GA/Chamblee), built 1993, S/N 64093 - [N655HX](https://openairdocs.org/aircraft/N655HX): [Helicopter Express LLC](https://openairdocs.org/faa-owner/HELICOPTER%20EXPRESS%20LLC), [Chamblee, GA](https://openairdocs.org/faa-place/GA/Chamblee), built 1968, S/N 64052 - [N6979R](https://openairdocs.org/aircraft/N6979R): [U S Leaseco Inc](https://openairdocs.org/faa-owner/U%20S%20LEASECO%20INC), [Aurora, OR](https://openairdocs.org/faa-place/OR/Aurora), built 1968, S/N 64079 - [N7095B](https://openairdocs.org/aircraft/N7095B): [Siller Helicopters LLC](https://openairdocs.org/faa-owner/SILLER%20HELICOPTERS%20LLC), [Chamblee, GA](https://openairdocs.org/faa-place/GA/Chamblee), built 1994, S/N 67-18430 - [N719HT](https://openairdocs.org/aircraft/N719HT): [U S Leaseco Inc](https://openairdocs.org/faa-owner/U%20S%20LEASECO%20INC), [Aurora, OR](https://openairdocs.org/faa-place/OR/Aurora), S/N 69-18469 - [N720HT](https://openairdocs.org/aircraft/N720HT): [US Leaseco Inc](https://openairdocs.org/faa-owner/US%20LEASECO%20INC), [Aurora, OR](https://openairdocs.org/faa-place/OR/Aurora), S/N 69-18463 ## NTSB investigations (8) 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 WPR23FA302](https://openairdocs.org/ntsb/WPR23FA302), Aug 7, 2023: Sikorsky S-64E (N4037S), Cabazon, CA, minor damage, 3 fatal. Probable cause: The Skycrane flight crew’s decision to enter the Fire Traffic Area’s 7-nm NOCOM ring at an altitude significantly above their maximum cleared altitude, which resulted in their need for an aggressive… - [NTSB WPR10WA321](https://openairdocs.org/ntsb/WPR10WA321), Jun 25, 2010: Erickson S64E (N229AC), Borneo Island, Indonesia, substantial damage, 1 fatal - [NTSB WPR09LA184](https://openairdocs.org/ntsb/WPR09LA184), Apr 7, 2009: Sikorsky CH-54B (N719HT), Corvallis, OR, substantial damage. Probable cause: The improper assembly of main rotor blade control components by the operator's maintenance personnel, which resulted in the main rotor blade's divergent path and their contact with the tail rotor… - [NTSB SEA05RA139](https://openairdocs.org/ntsb/SEA05RA139), Jul 6, 2005: Erickson Air-Crane S-64F (N236AC), Rome, Italy, destroyed, 1 fatal - [NTSB WAS04WA012](https://openairdocs.org/ntsb/WAS04WA012), Aug 26, 2004: Sikorsky S-64E (N248AC), Bastia, Corsica, France, destroyed, 2 fatal - [NTSB LAX03TA229](https://openairdocs.org/ntsb/LAX03TA229), Jul 8, 2003: Sikorsky S-64E (N6979R), Tucson, AZ, substantial damage. Probable cause: the pilot's failure to maintain tail rotor clearance while hovering resulting in a tail rotor blade strike. - [NTSB SEA03WA094](https://openairdocs.org/ntsb/SEA03WA094), Jun 1, 2003: Sikorsky S-64F (N223AC), Bintutu, Malaysia, destroyed - [NTSB SEA99LA038](https://openairdocs.org/ntsb/SEA99LA038), Mar 2, 1999: Sikorsky S-64E (N194AC), Shelton, WA, no damage, 1 fatal. Probable cause: The failure of the victim to follow the procedure that required him to make sure that all choker lines had separated from the helicopter's release mechanism prior to entering the landing (collection… ## FAA accident and incident reports (7) 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 20230806010821A](https://openairdocs.org/incident/20230806010821A), Aug 6, 2023: Sikorsky S-64E (N4037S), Cabazon, CA, Minor damage. On 08/06/2023 (08/07/2023 UTC) a bell 407 helicopter and CH-54A helicopter separately departed the cal fire base located in hemet, CA engaged in fire support… - [Incident 20221001009409I](https://openairdocs.org/incident/20221001009409I), Oct 1, 2022: Sikorsky SK-64 (N159AC), Central Point, OR, Minor damage. The flight was maintenance related for a return to service validation. The portions of the flight leading to the incident were uneventful and the maintenance… - [Accident 20090407004529A](https://openairdocs.org/incident/20090407004529A), Apr 7, 2009: Skrsky CH54B (N719HT), Corvallis, OR, Substantial damage. (-23) During shutdown from a training flight, the pilot felt an unusual airframe vibration. The cyclic stick was at the normal upright position for shutdown.… - [Accident 20050706014939A](https://openairdocs.org/incident/20050706014939A), Jul 6, 2005: Skrsky S64F (N236AC), Roma, Destroyed, 1 fatal. (-23) On July 6, 2005, at approximately 1630 central european summer time, an erickson air-crane, IN., S-64F helicopter, N236AC, was destroyed following impact… - [Accident 20030707016859A](https://openairdocs.org/incident/20030707016859A), Jul 7, 2003: Skrsky S64E (N6979R), Tucson, AZ, Minor damage. (-23) While firefighting in the Tucson, AZ area the pilot had made the sixth (6th) fueling cycle (ea. "Cycle is approx. 1.5 hrs) and were about to depart when… - [Accident 19990302001929A](https://openairdocs.org/incident/19990302001929A), Mar 2, 1999: Skrsky S64E (N194AC), Shelton, WA, 1 fatal. Sikorsky S64E skycrane helicopter was involved in a logging operation, the acft came in to the landing site and dropped a load of logs, one log hung up on a… - [Incident 19820112002959I](https://openairdocs.org/incident/19820112002959I), Jan 12, 1982: Skrsky S64E (N4037S), San Jose, CA, Minor damage. Tail rotor struck runway just before touchdown for landing. Left main strut was flat. Piece of rotor hit cockpit. ## PMA parts (OpenAirDocs) (397, 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 - [790450TMT](https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID194257482820260616140919.0001): Bearing, Sleeve. Source Manufacturing Inc · PMA PQ1549CE · Replaces 790450 · Apr 10, 2026 - [417637TMT](https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID192285882020260616140920.0001): Gearshaft, Main Oil Pump. Source Manufacturing Inc · PMA PQ1549CE · Replaces 417637 · Apr 10, 2026 - [659330CL1TMT](https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID190668690320260616140918.0001): Counterweight. Source Manufacturing Inc · PMA PQ1549CE · Replaces 659330CL1 · 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 - [501267TMT](https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID184063503120260616140919.0001): Ring, Retaining. Source Manufacturing Inc · PMA PQ1549CE · Replaces 501267 · 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 - [575188TMT](https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID176624874620260616140920.0001): Seal, Air – Free Turbine Inlet. Source Manufacturing Inc · PMA PQ1549CE · Replaces 575188 · Apr 10, 2026 - [426273TMT](https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID176409759220260616140917.0001): Seal Ring. Source Manufacturing Inc · PMA PQ1549CE · Replaces 426273 · 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 - [501268TMT](https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID169474205220260616140919.0001): Ring, Retaining. Source Manufacturing Inc · PMA PQ1549CE · Replaces 501268 · 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 - [659330CL2TMT](https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID147446137020260616140918.0001): Counterweight. Source Manufacturing Inc · PMA PQ1549CE · Replaces 659330CL2 · Apr 10, 2026 - [394708TMT](https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID147428463920260616140919.0001): Gasket. Source Manufacturing Inc · PMA PQ1549CE · Replaces 394708B · 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 - [587509TMT](https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID133473561820260616140920.0001): Seal, Air – Free Turbine Rotor. Source Manufacturing Inc · PMA PQ1549CE · Replaces 587509 · Apr 10, 2026 - [673000TMT](https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID131823038620260616140918.0001): Plug. Source Manufacturing Inc · PMA PQ1549CE · Replaces 673000 · Apr 10, 2026 - [431579TMT](https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID127677931820260616140913.0001): Coupling. Source Manufacturing Inc · PMA PQ1549CE · Replaces 431579 · Apr 10, 2026 - [80904TMT](https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID126014310520260616140916.0001): Washer, Thrust. Source Manufacturing Inc · PMA PQ1549CE · Replaces 80904 · Apr 10, 2026 - [668736TMT](https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID125327944020260616140920.0001): Gearshaft. Source Manufacturing Inc · PMA PQ1549CE · Replaces 668736 · 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 - [419881TMT](https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID119326239520260616140918.0001): Bolt. Source Manufacturing Inc · PMA PQ1549CE · Replaces 419881 · Apr 10, 2026 - [407395TMT](https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID117839264120260616140915.0001): Washer, Key. Source Manufacturing Inc · PMA PQ1549CE · Replaces 407395 · Apr 10, 2026 - [406102TMT](https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID114716142420260616140920.0001): Gasket, Valve. Source Manufacturing Inc · PMA PQ1549CE · Replaces 406102B · 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 - [575183](https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID113978756220250926210552.0001): Seal – Air Free Turbine, 2-Stage. Able Aerospace Services, Inc. · PMA PQ2487NM · Replaces 575183 · Aug 26, 2025 - [544180SMI](https://drs.faa.gov/browse/excelExternalWindow/E105A386FAD257298625847400613394.0001): Cam Seal. Source Manufacturing Inc · PMA PQ1549CE · Replaces 544180 · Dec 22, 2018 - [332060AA](https://drs.faa.gov/browse/excelExternalWindow/F990FC5037493FB5862580CE00749166.0001): Bolt. Able Aerospace Services, Inc. · PMA PQ2487NM · Replaces 332060 · Feb 1, 2017 - [370211AA](https://drs.faa.gov/browse/excelExternalWindow/F23F8CE181A9172686257FAE006ADEE6.0001): Retaining Ring. Able Engineering and Component Services, Inc. · PMA PQ2487NM · Replaces 370211 · Feb 1, 2017 All of them: https://openairdocs.org/engine/pratt-whitney-jftd12a-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.