# Pratt & Whitney PT6T-6

- Type: Engine model (FAA registry)
- Registry code: 51524
- Manufacturer (registry): P & W
- Model: PT6T-6
- Engine type: Turbo-shaft
- Power: 925 hp
- Data sheet: [TCDS E22EA](https://openairdocs.org/tcds/E22EA) (OpenAirDocs)
- Holder: Pratt & Whitney Canada Corp.
- Installed in: 1 registered aircraft
- Page: https://openairdocs.org/engine/pratt-whitney-pt6t-6

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 79-11-03](https://openairdocs.org/ad/79-11-03): Automatic Fuel Control · Pratt & Whitney Canada PT6T-3 and PT6T-6. Effective May 31, 1979
- [AD 78-17-05](https://openairdocs.org/ad/78-17-05): Automatic Fuel Control Unit · Pratt & Whitney Canada PT6T-3, PT6T-3A and PT6T-6. Effective Aug 31, 1978
- [AD 76-02-08](https://openairdocs.org/ad/76-02-08): Fuel Pump · Pratt & Whitney Canada PT6T-3, PT6T-3A and PT6T-6. Effective Feb 5, 1976

## Registered aircraft (1)

- [N126GW](https://openairdocs.org/aircraft/N126GW): [Aircrane Inc](https://openairdocs.org/faa-owner/AIRCRANE%20INC), [Winder, GA](https://openairdocs.org/faa-place/GA/Winder), built 1959, S/N 581124

## NTSB investigations (1)

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 ERA12LA493](https://openairdocs.org/ntsb/ERA12LA493), Aug 1, 2012: Sikorsky S-58JT (N126GW), Middletown, DE, substantial damage. Probable cause: The pilot's failure to recognize that the helicopter was experiencing tail rotor dynamic instability and to take immediate corrective actions during an external load lift, which resulted in the…

## FAA accident and incident reports (1)

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 20120801015349A](https://openairdocs.org/incident/20120801015349A), Aug 1, 2012: Sikorsky S-58JT (N126GW), Middletown, DE, Substantial damage. The helicopter was in a hover phase of flight as it was setting an air conditioning unit on a single story warehouse. The pilot felt a vibration in the tail…

## Service difficulty reports (15)

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

- [SDR CA180510007](https://openairdocs.org/sdr/CA180510007), May 10, 2018: WIRE. CHAFED. (CAN) PART NUMBERS: D38999/26WA98SN AND 30-269-1P09N05 WIRING THROUGH EMI CONNECTOR CONTACTS AND CHAFES ON BACKSHELL 90 DEGREE BEND AND SHORTS TO GROUND GIVING 
- [SDR CA150408017](https://openairdocs.org/sdr/CA150408017), Mar 31, 2015: TURBINE WHEEL. FRACTURED. (CAN) CUSTOMER REPORTED SEEING FLAMES EXITING THE ENGINE EXHAUST DUCT WHILE THE HELICOPTER WAS IN HOVER. ACFT LANDED AND EMERGENCY SHUTDOWN WAS PERFORMED. BORES
- [SDR CA121105014](https://openairdocs.org/sdr/CA121105014), Oct 19, 2012: FCU. MALFUNCTIONED. (CAN) AFTER LANDING, UPON ROTATING THROTTLE FROM FLY TO IDLE, THE ENGINE SHUT DOWN UNEXPECTEDLY. THE ENGINE WAS RE-STARTED AND EXHIBITED SIGNS OF COMPRESSOR STA
- [SDR CA111214009](https://openairdocs.org/sdr/CA111214009), Dec 14, 2011: SERVO. DEFECTIVE. (CAN) PART RECEIVED FROM CUSTOMER AS ZERO TIME FROM OVERHAUL. CUSTOMER REPORTED THAT LOWER CYLINDER LOCKS, WILL NOT EXTEND. SUSPECT IMPROPER BYPASS & SERVO LOWE
- [SDR CA070625003](https://openairdocs.org/sdr/CA070625003), Jun 21, 2011: DOOR. DETACHED. (CAN) WHILE IN NORMAL CRUISE FLIGHT, THE PILOT`S DOOR DEPARTED THE ACFT. THE PROBABLE CAUSE WOULD BE IMPROPER INSTALLATION OF THE DOOR. THE PILOT LANDED AS SOON
- [SDR 901CHI0208](https://openairdocs.org/sdr/901CHI0208), Feb 21, 2008: DOOR. DEPARTED. DURING POSTFLIGHT INSPECTION, AFTER LANDING, MAINT DISCOVERED CABIN DOOR WAS MISSING. INSP OF AC FOUND NO DAMAGE OR MISSING COMPONENTS OTHER THAN DOOR. REPLACEM
- [SDR 901012008](https://openairdocs.org/sdr/901012008), Feb 17, 2008: DOOR. DEPARTED. DURING POSTFLIGHT INSP, AFTER LANDING, MAINT DISCOVERED CABIN DOOR WAS MISSING. INSP OF AC FOUND NO DAMAGE OR MISSING COMPONENTS OTHER THAN DOOR. REPLACEMENT DO
- [SDR 9010208](https://openairdocs.org/sdr/9010208), Feb 17, 2008: DOOR. DEPARTED. DURING POSTFLIGHT INSPECTION, AFTER LANDING, MAINT DISCOVERED CABIN DOOR WAS MISSING. INSPECTION OF AIRCRAFT FOUND NO DAMAGE OR MISSING COMPONENTS OTHER THAN DO
- [SDR CA071205007](https://openairdocs.org/sdr/CA071205007), Nov 30, 2007: ENGINE. MAKING METAL. (CAN) CREW HEARD A METALLIC BANG FROM THE ENGINE AREA, FOLLOWED BY CAUTION LIGHTS. ENGINE WAS SHUTDOWN AND AIRCRAFT LANDED. SUBSEQUENT INITIAL INSPECTION REVEAL
- [SDR CA040928010](https://openairdocs.org/sdr/CA040928010), Sep 27, 2004: COMPRESSOR. CRACKED. (CAN) THE COMPRESSOR TURBINE DISK WAS INSTALLED ON AGUSTA BELL AB212. A CRACK INDICATION WAS FOUND DURING OVERHAUL NDT. PWC WILL CONDUCT INVESTIGATION TO ESTABL
- [SDR CA971125003](https://openairdocs.org/sdr/CA971125003), Oct 21, 1997: BLADE. DEBONDING. (CAN) DEBONDING OF POCKET FROM MAIN ROTOR BLADE. A SECTION 8 INCHES BY 8 INCHES CAME OFF.
- [SDR 96ZZZX4781](https://openairdocs.org/sdr/96ZZZX4781), Aug 7, 1996: ENGINE. STALLS. DURING HIGH POWER DEMANDS, COMPRESSOR STALLS NOTED BY PILOT. DURING ACCELERATION CHECKS ON GROUND, MECHANIC NOTED COMPRESSOR STALLS. NYH BELIEVES THE COMPRESSOR
- [SDR CA960826104](https://openairdocs.org/sdr/CA960826104), Jul 10, 1996: CLUTCH ASSEMBLY. DISENGAGED. (CAN) THE HELICOPTER WAS LIFTING A LOAD, WHEN THE FREEWHEEL CLUTCH INSIDE THE COMBINING GEARBOX DECOUPLED OR DISENGAGED ON THE #2 ENGINE SIDE. THE #2 ENGINE WEN
- [SDR CA960826105](https://openairdocs.org/sdr/CA960826105), Jul 3, 1996: TRANSMISSION. MAKING METAL. (CAN) MAIN GEARBOX REMOVED DUE TO METAL FOUND IN OIL FILTER
- [SDR 95ZZZX1334](https://openairdocs.org/sdr/95ZZZX1334), Mar 8, 1995: ACCUMULATOR. LEAKING. DURING POWER PLANT OPERATION, FUEL ACCUMULATOR STARTED TO LEAK FUEL FROM THE FRONT SEAM. ACCUMULATOR WAS REPLACED AT THAT TIME.

## STCs that may be installed (OpenAirDocs) (2)

Approved for this engine model: the STC's model list names it on its data sheet, or a series that includes it. In force first, then newest. The registry doesn't record which STCs an aircraft has.

- [STC SE00022EN](https://openairdocs.org/stc/SE00022EN): Installation of Oil Tank Filler Neck Check Valve. Helicopter Support Inc Services Div
- [STC SE659NE](https://openairdocs.org/stc/SE659NE): Installation of oil tank filler neck check valve, P/N TSA-76A. Aviation Components Support

## PMA parts (OpenAirDocs) (454, 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.

- [ST3277-01CP](https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID199989902020260311145336.0001): Gasket, Starter Generator. Core Parts LLC · PMA PQ05326NM · Replaces ST3277-01 · Feb 26, 2026
- [ST3278-01CP](https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID116739255220260311145337.0001): Gasket, Engine Accessory Drive. Core Parts LLC · PMA PQ05326NM · Replaces ST3278-01 · Feb 26, 2026
- [ST3276-01CP](https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID101621452020260311145336.0001): Gasket, Four-Hole. Core Parts LLC · PMA PQ05326NM · Replaces ST3276-01 · Feb 26, 2026
- [3109585-01CP](https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID117456133120260217165221.0001): Spacer, Oil Slinger. Core Parts LLC · PMA PQ05326NM · Replaces 3109585-01 · Feb 11, 2026
- [3010880CP](https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID111084696520260108163216.0001): Gasket, Igniter. CORE PARTS LLC · PMA PQ05326NM · Replaces 3010880 · Oct 16, 2025
- [3034508WFC](https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID168792409620250624152910.0001): Oil Filter Element. Donaldson Company Inc · PMA PQ2432CE · Replaces 3034508 3036376, Alternate: 11-11064… · Jun 2, 2025
- [WF334552](https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID147857861520250602133017.0001): Compressor Air Filter. Donaldson Company Inc · PMA PQ2432CE · Replaces 3029268, Alternate: 3028856, 3029267… · May 23, 2025
- [WF344763](https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID115254655320250602133049.0001): Nozzle Cover, Machined. Donaldson Company Inc · PMA PQ2432CE · Replaces 3120869-01, Alternate: 3019491… · May 23, 2025
- [WF336238](https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID112708987520250602133027.0001): Compressor Air Filter Element. Donaldson Company Inc · PMA PQ2432CE · Replaces 3038142, P-1139 · May 23, 2025
- [3014422AA](https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID157889633320250310190842.0001): Packing with Retainer. Aero Attitude, LLC · PMA PQ00001CB · Replaces PWC 3014422 · Feb 25, 2025
- [3115091-01CP](https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID180857219920250923184724.0001): Ball, Plastic, 0.750. CORE PARTS LLC · PMA PQ05326NM · Replaces 3115091-01 · Feb 13, 2025
- [3012414AA](https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID169774044220250106202801.0001): Nut, Self-Locking, 12 Point. Aero Attitude, LLC · PMA PQ00001CB · Replaces 3012411 · Dec 10, 2024
- [3012414AA](https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID164469161820250106202800.0001): Nut, Self-Locking, 12 Point. Aero Attitude, LLC · PMA PQ00001CB · Replaces 3012413 · Dec 10, 2024
- [3012414AA](https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID152753542620250106202759.0001): Nut, Self-Locking, 12 Point. Aero Attitude, LLC · PMA PQ00001CB · Replaces 3012414 · Dec 10, 2024
- [3012414AA](https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID117377138920250106202801.0001): Nut, Self-Locking, 12 Point. Aero Attitude, LLC · PMA PQ00001CB · Replaces 3012412 · Dec 10, 2024
- [3012675AA](https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID196954661720240919140845.0001): Nut, Self-Locking, Hex. Aero Attitude, LLC · PMA PQ00001CB · Replaces 3012675, 3005816, 3012674, 3028286… · Aug 7, 2024
- [3015234AA](https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID130436253520240919140838.0001): Nut, Self-Locking, Shank. Aero Attitude, LLC · PMA PQ00001CB · Replaces 3015234, 3015233, 3015232, 3016299… · Aug 7, 2024
- [3006523CP](https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID132375139220240509162259.0001): Bearing, Sleeve, Flanged. CORE PARTS LLC · PMA PQ05326NM · Replaces 3006523 · Mar 25, 2024
- [3008676CP](https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID120421035120240509162301.0001): Bearing, Sleeve, Flanged. CORE PARTS LLC · PMA PQ05326NM · Replaces 3008676 · Mar 25, 2024
- [3003987CP](https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID125662034220231204145325.0001): Pin, Lock. CORE PARTS LLC · PMA PQ05326NM · Replaces 3003987 · Aug 1, 2023
- [3016598CP](https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID189342823620231204151230.0001): Washer, Key. CORE PARTS LLC · PMA PQ05326NM · Replaces 3016598 · Jul 26, 2023
- [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
- [3005290CLACP](https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID171588224920250611143002.0001): Weight, Balance, Compressor. CORE PARTS LLC · PMA PQ05326NM · Replaces 3005290CLA · May 19, 2023
- [3005290CLECP](https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID142064254420250611143003.0001): Weight, Balance, Compressor. CORE PARTS LLC · PMA PQ05326NM · Replaces 3005290CLE · May 19, 2023
- [3005290CLDCP](https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID141205886020250611143003.0001): Weight, Balance, Compressor. CORE PARTS LLC · PMA PQ05326NM · Replaces 3005290CLD · May 19, 2023
- [3005290CLBCP](https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID118455233520250611143003.0001): Weight, Balance, Compressor. CORE PARTS LLC · PMA PQ05326NM · Replaces 3005290CLB · May 19, 2023
- [3005290CLCCP](https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID103292467820250611143003.0001): Weight, Balance, Compressor. CORE PARTS LLC · PMA PQ05326NM · Replaces 3005290CLC · May 19, 2023
- [2524999-5](https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID186366461620240306163320.0001): Governor, Free Turbine. Honeywell International Inc. · PMA PQ1222NM · Replaces 3045144-01 · Apr 14, 2023
- [3244735-17](https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID144892661020240306163320.0001): Fuel Control Automatic. Honeywell International Inc. · PMA PQ1222NM · Replaces 3118773-05 · Apr 14, 2023
- [3015234CP](https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID160866993420230717162557.0001): Nut, Self-Locking, Shank. CORE PARTS LLC · PMA PQ05326NM · Replaces 3015234 · Jan 23, 2023
- [3244708-1](https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID184466062420241002190411.0001): Valve, Fuel Press Rglt. Honeywell International Inc. · PMA PQ1222NM · Replaces 3020373 · Jan 20, 2023
- [3244736-8](https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID176197315920241002190412.0001): Fuel Control Manual. Honeywell International Inc. · PMA PQ1222NM · Replaces 3031803 · Jan 20, 2023
- [3244735-17](https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID163561707220241002190411.0001): Fuel Control - Automatic. Honeywell International Inc. · PMA PQ1222NM · Replaces 3118773-05 · Jan 20, 2023
- [3244706-7](https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID145837251220241002190411.0001): Control Torque. Honeywell International Inc. · PMA PQ1222NM · Replaces 3054933-01 · Jan 20, 2023
- [540-1407-4](https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID111492413120241002190411.0001): Valve, Compressor Bleed. Honeywell International Inc. · PMA PQ1222NM · Replaces 3049038-03 · Jan 20, 2023
- [3008676CP](https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID117155957820230717173023.0001): Bearing, Sleeve,Flanged. CORE PARTS LLC · PMA PQ05326NM · Replaces 3008676 · Jan 16, 2023
- [3010117CL1CP](https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID183743693820230126115859.0001): Weight, Balance, Turbine. CORE PARTS LLC · PMA PQ05326NM · Replaces 3010117CL1 · Nov 22, 2022
- [3010117CL3CP](https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID183682707920230126115850.0001): Weight, Balance, Turbine. CORE PARTS LLC · PMA PQ05326NM · Replaces 3010117CL3 · Nov 22, 2022
- [3010117CL4CP](https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID182297337020230126115851.0001): Weight, Balance, Turbine. CORE PARTS LLC · PMA PQ05326NM · Replaces 3010117CL4 · Nov 22, 2022
- [3010117CL1CP](https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID150552523320230126115848.0001): Weight, Balance, Turbine. CORE PARTS LLC · PMA PQ05326NM · Replaces 3010117CL1 · Nov 22, 2022
- [3010117CL5CP](https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID126453214120230126115851.0001): Weight, Balance, Turbine. CORE PARTS LLC · PMA PQ05326NM · Replaces 3010117CL5 · Nov 22, 2022
- [3010117CL2CP](https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID103500720820230126115850.0001): Weight, Balance, Turbine. CORE PARTS LLC · PMA PQ05326NM · Replaces 3010117CL2 · Nov 22, 2022
- [3012252CP](https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID157067445420230126115957.0001): Counterweight. CORE PARTS LLC · PMA PQ05326NM · Replaces 3012252 · Oct 12, 2022
- [3014660CP](https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID196274608520221018224351.0001): Ring, Sealing, Power Output Section. CORE PARTS LLC · PMA PQ05326NM · Replaces 3014660 · Sep 8, 2022
- [3014660CP](https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID153003180020221005184146.0001): Ring, Sealing, Power Output Section. CORE PARTS LLC · PMA PQ05326NM · Replaces 3014660 · Sep 8, 2022
- [3024992CP](https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID141560431620221005184146.0001): Ring, Sealing, Power Output Section. CORE PARTS LLC · PMA PQ05326NM · Replaces 3024992 · Sep 8, 2022
- [3024992CP](https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID126971723820221018224352.0001): Ring, Sealing, Power Output Section. CORE PARTS LLC · PMA PQ05326NM · Replaces 3024992 · Sep 8, 2022
- [3075036-01CP](https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID159765637820221018224236.0001): Ring, Sealing, Turbine Exhaust Duct. CORE PARTS LLC · PMA PQ05326NM · Replaces 3075036-01 · Aug 29, 2022
- [3113510-01CP](https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID136688246620221018224033.0001): Cover, Compressor Air Filter. CORE PARTS LLC · PMA PQ05326NM · Replaces 3113510-01 · Aug 24, 2022
- [3102336-01CP](https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID180365049520230126120257.0001): Stubshaft, Compressor, Front. CORE PARTS LLC · PMA PQ05326NM · Replaces 3102336-01 · Jul 22, 2022

All of them: https://openairdocs.org/engine/pratt-whitney-pt6t-6/pma.md

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