# Rolls-Royce 250-C20W

- Type: Engine model (FAA registry)
- Registry code: 54189
- Manufacturer (registry): ROLLS-ROYC
- Model: 250-C20W
- Engine type: Turbo-shaft
- Power: 420 hp
- Data sheet: [TCDS E4CE](https://openairdocs.org/tcds/E4CE) (OpenAirDocs)
- Holder: Rolls-Royce Corporation
- Installed in: 51 registered aircraft
- Page: https://openairdocs.org/engine/rolls-royce-250-c20w

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 2022-10-06](https://openairdocs.org/ad/2022-10-06): Turbine Section · Rolls-Royce 250-C20, 250-C20B, 250-C20C (T63-A-720) and 9 more. Effective Jun 28, 2022
- [AD 2018-13-01](https://openairdocs.org/ad/2018-13-01): Turbine Governor · Rolls-Royce 250-C10 (T63-A-5), 250-C18, 250-C18A and 24 more. Effective Aug 16, 2018
- [AD 2006-16-04](https://openairdocs.org/ad/2006-16-04): Inspection of the fuel nozzle screen · Rolls-Royce 250-B15A, 250-B15E, 250-B15G and 43 more. Effective Sep 7, 2006
- [AD 2006-13-06](https://openairdocs.org/ad/2006-13-06): Gas producer rotor assembly tie bolts · Rolls-Royce 250-B17, 250-B17B, 250-B17C and 16 more. Effective Jul 26, 2006
- [AD 2005-10-13](https://openairdocs.org/ad/2005-10-13): Turbine energy absorbing ring · Rolls-Royce 250-B17B, 250-B17C, 250-B17D and 7 more. Effective Jun 22, 2005
- [AD 2004-26-09](https://openairdocs.org/ad/2004-26-09): Compressor Adaptor Couplings · Rolls-Royce 250-B17, 250-B17B, 250-B17C and 8 more. Effective Feb 8, 2005
- [AD 2001-24-12](https://openairdocs.org/ad/2001-24-12): Helical Torquemeter Gearshaft Assembly · Rolls-Royce 250-B17, 250-B17C, 250-B17D and 13 more. Effective Dec 19, 2001
- [AD 98-24-28](https://openairdocs.org/ad/98-24-28): Main Fuel Control Bellows · Rolls-Royce 250-B15A, 250-B15E, 250-B15G and 36 more. Effective Jan 7, 1999
- [AD 96-19-01](https://openairdocs.org/ad/96-19-01): Superior Air Parts Manufacture Approval (PMA) Bearings · Rolls-Royce 250-B15G, 250-B17F, 250-B17F/1 and 17 more. Effective Sep 26, 1996
- [AD 88-17-01](https://openairdocs.org/ad/88-17-01): Fuel Controls · Rolls-Royce 250-B17, 250-B17B, 250-B17C and 26 more. Effective Mar 1, 1989
- [AD 82-24-05](https://openairdocs.org/ad/82-24-05): Control Assembly and Power Turbine Governor Assembly · Rolls-Royce 250-B15A, 250-B15E, 250-B15G and 43 more. Effective Nov 26, 1982
- [AD 77-15-12](https://openairdocs.org/ad/77-15-12): Power Turbine Coupling Nut · Rolls-Royce 250-B15A, 250-B15E, 250-B15G and 23 more. Effective Sep 23, 1977

Historical (superseded or no longer in force):

- [AD 2017-18-14](https://openairdocs.org/ad/2017-18-14) (historical): Turbine Section · Rolls-Royce 250-C20, 250-C20B, 250-C20F and 8 more. Effective Oct 13, 2017
- [AD 2015-02-22](https://openairdocs.org/ad/2015-02-22) (historical): Repetitive visual inspections · Rolls-Royce 250-B17, 250-B17B, 250-B17C and 15 more. Effective Mar 9, 2015
- [AD 2004-24-09](https://openairdocs.org/ad/2004-24-09) (historical): Fuel nozzle · Rolls-Royce 250-B15A, 250-B15E, 250-B15G and 40 more. Effective Jan 5, 2005
- [AD 2001-20-51](https://openairdocs.org/ad/2001-20-51) (historical): Helical Torquemeter Gearshaft Assembly · 250-B17, 250-B17C, 250-B17D and 12 more

## Registered aircraft (51, first 50)

- [N208RJ](https://openairdocs.org/aircraft/N208RJ): [Boswell Fredric R](https://openairdocs.org/faa-owner/BOSWELL%20FREDRIC%20R), [Amherst, NH](https://openairdocs.org/faa-place/NH/Amherst), built 2014, S/N 5190
- [N214TS](https://openairdocs.org/aircraft/N214TS): [T Air LLC](https://openairdocs.org/faa-owner/T%20AIR%20LLC), [Columbia Falls, MT](https://openairdocs.org/faa-place/MT/Columbia%20Falls), S/N 0073A
- [N274ST](https://openairdocs.org/aircraft/N274ST): [Vertical Lift LLC](https://openairdocs.org/faa-owner/VERTICAL%20LIFT%20LLC), [Cody, WY](https://openairdocs.org/faa-place/WY/Cody), built 2007, S/N 5107
- [N2992Z](https://openairdocs.org/aircraft/N2992Z): [Euroaviation Inc Trustee](https://openairdocs.org/faa-owner/EUROAVIATION%20INC%20TRUSTEE), Kematen, built 2009, S/N 5130
- [N307RL](https://openairdocs.org/aircraft/N307RL): [Wellevaluations LLC](https://openairdocs.org/faa-owner/WELLEVALUATIONS%20LLC), [Wichita, KS](https://openairdocs.org/faa-place/KS/Wichita), built 2006, S/N 5098
- [N313BA](https://openairdocs.org/aircraft/N313BA): [R & R Testing Inc](https://openairdocs.org/faa-owner/R%20%26%20R%20TESTING%20INC), [Watertown, SD](https://openairdocs.org/faa-place/SD/Watertown), built 2006, S/N 0059A
- [N32EN](https://openairdocs.org/aircraft/N32EN): [Enstrom Helicopter Corp](https://openairdocs.org/faa-owner/ENSTROM%20HELICOPTER%20CORP), [Menominee, MI](https://openairdocs.org/faa-place/MI/Menominee), built 2025, S/N 5260
- [N406CS](https://openairdocs.org/aircraft/N406CS): [Siderius Construction Llp](https://openairdocs.org/faa-owner/SIDERIUS%20CONSTRUCTION%20LLP), [Kalispell, MT](https://openairdocs.org/faa-place/MT/Kalispell), built 2000, S/N 0026A
- [N420LE](https://openairdocs.org/aircraft/N420LE): [Cox Robert D](https://openairdocs.org/faa-owner/COX%20ROBERT%20D), [Girdwood, AK](https://openairdocs.org/faa-place/AK/Girdwood), built 2006, S/N 5101
- [N44SZ](https://openairdocs.org/aircraft/N44SZ): [Enstrom Helicopter Corp](https://openairdocs.org/faa-owner/ENSTROM%20HELICOPTER%20CORP), [Menominee, MI](https://openairdocs.org/faa-place/MI/Menominee), built 2009, S/N 5131
- [N451LE](https://openairdocs.org/aircraft/N451LE): [Enstrom Helicopter Corp](https://openairdocs.org/faa-owner/ENSTROM%20HELICOPTER%20CORP), [Menominee, MI](https://openairdocs.org/faa-place/MI/Menominee), built 2026, S/N 5262
- [N451NE](https://openairdocs.org/aircraft/N451NE): [Enstrom Helicopter Corp](https://openairdocs.org/faa-owner/ENSTROM%20HELICOPTER%20CORP), [Menominee, MI](https://openairdocs.org/faa-place/MI/Menominee), built 2026, S/N 5263
- [N451RE](https://openairdocs.org/aircraft/N451RE): [Enstrom Helicopter Corp](https://openairdocs.org/faa-owner/ENSTROM%20HELICOPTER%20CORP), [Menominee, MI](https://openairdocs.org/faa-place/MI/Menominee), built 2026, S/N 5265
- [N456KJ](https://openairdocs.org/aircraft/N456KJ): [Taod Aviation LLC](https://openairdocs.org/faa-owner/TAOD%20AVIATION%20LLC), [Elkhart, IN](https://openairdocs.org/faa-place/IN/Elkhart), built 2016, S/N 5238
- [N46DK](https://openairdocs.org/aircraft/N46DK): [Wrong Bros Ranch LLC](https://openairdocs.org/faa-owner/WRONG%20BROS%20RANCH%20LLC), [Lake Havasu City, AZ](https://openairdocs.org/faa-place/AZ/Lake%20Havasu%20City), built 1996, S/N 5014
- [N4806](https://openairdocs.org/aircraft/N4806): [Tenessee Helicopter Sales & Service Inc](https://openairdocs.org/faa-owner/TENESSEE%20HELICOPTER%20SALES%20%26%20SERVICE%20INC), [Bolivar, TN](https://openairdocs.org/faa-place/TN/Bolivar), S/N 5092
- [N480AB](https://openairdocs.org/aircraft/N480AB): [Bardo Wade](https://openairdocs.org/faa-owner/BARDO%20WADE), [Erin, NY](https://openairdocs.org/faa-place/NY/Erin), built 1996, S/N 5013
- [N480AJ](https://openairdocs.org/aircraft/N480AJ): [Ramos Aviation Services LLC](https://openairdocs.org/faa-owner/RAMOS%20AVIATION%20SERVICES%20LLC), [Arvada, CO](https://openairdocs.org/faa-place/CO/Arvada), S/N 5104
- [N480CJ](https://openairdocs.org/aircraft/N480CJ): [Centrix Air Inc](https://openairdocs.org/faa-owner/CENTRIX%20AIR%20INC), [Central Point, OR](https://openairdocs.org/faa-place/OR/Central%20Point), built 2008, S/N 5123
- [N480EH](https://openairdocs.org/aircraft/N480EH): [Sloflight LLC](https://openairdocs.org/faa-owner/SLOFLIGHT%20LLC), [Ogden, UT](https://openairdocs.org/faa-place/UT/Ogden), built 2002, S/N 5046
- [N480EN](https://openairdocs.org/aircraft/N480EN): [Enstrom Helicopter Corp](https://openairdocs.org/faa-owner/ENSTROM%20HELICOPTER%20CORP), [Menominee, MI](https://openairdocs.org/faa-place/MI/Menominee), built 2025, S/N 5259
- [N480GB](https://openairdocs.org/aircraft/N480GB): [International Air Services Inc Trustee](https://openairdocs.org/faa-owner/INTERNATIONAL%20AIR%20SERVICES%20INC%20TRUSTEE), [Carson City, NV](https://openairdocs.org/faa-place/NV/Carson%20City), built 2008, S/N 5128
- [N480HC](https://openairdocs.org/aircraft/N480HC): [Hangar Seven LLC](https://openairdocs.org/faa-owner/HANGAR%20SEVEN%20LLC), [Penn Yan, NY](https://openairdocs.org/faa-place/NY/Penn%20Yan), built 2007, S/N 5112
- [N480JB](https://openairdocs.org/aircraft/N480JB): [Southern Aircraft Consultancy Inc Trustee](https://openairdocs.org/faa-owner/SOUTHERN%20AIRCRAFT%20CONSULTANCY%20INC%20TRUSTEE), [Casper, WY](https://openairdocs.org/faa-place/WY/Casper), built 2007, S/N 5108
- [N480JS](https://openairdocs.org/aircraft/N480JS): [Richard Smith Farms Inc](https://openairdocs.org/faa-owner/RICHARD%20SMITH%20FARMS%20INC), [Rexburg, ID](https://openairdocs.org/faa-place/ID/Rexburg), built 2008, S/N 5125
- [N480L](https://openairdocs.org/aircraft/N480L): [Irrg LLC](https://openairdocs.org/faa-owner/IRRG%20LLC), [Kane, PA](https://openairdocs.org/faa-place/PA/Kane), built 2008, S/N 5124
- [N480MD](https://openairdocs.org/aircraft/N480MD): [J&H Aicraft Leasing LLC](https://openairdocs.org/faa-owner/J%26H%20AICRAFT%20LEASING%20LLC), [Berrien Springs, MI](https://openairdocs.org/faa-place/MI/Berrien%20Springs), built 2007, S/N 5115
- [N480MH](https://openairdocs.org/aircraft/N480MH): [Bank Of Utah Trustee](https://openairdocs.org/faa-owner/BANK%20OF%20UTAH%20TRUSTEE), [Salt Lake City, UT](https://openairdocs.org/faa-place/UT/Salt%20Lake%20City), built 2009, S/N 5129
- [N480ML](https://openairdocs.org/aircraft/N480ML): [Cline Air Services LLC](https://openairdocs.org/faa-owner/CLINE%20AIR%20SERVICES%20LLC), [Ellensburg, WA](https://openairdocs.org/faa-place/WA/Ellensburg), built 1998, S/N 5032
- [N480PQ](https://openairdocs.org/aircraft/N480PQ): [Plaquemines Parish Sheriff'S Office](https://openairdocs.org/faa-owner/PLAQUEMINES%20PARISH%20SHERIFF'S%20OFFICE), [Belle Chasse, LA](https://openairdocs.org/faa-place/LA/Belle%20Chasse), built 2008, S/N 5117
- [N480TH](https://openairdocs.org/aircraft/N480TH): [Troubleshooter Network Inc](https://openairdocs.org/faa-owner/TROUBLESHOOTER%20NETWORK%20INC), [Denver, CO](https://openairdocs.org/faa-place/CO/Denver), built 2005, S/N 5077
- [N480TR](https://openairdocs.org/aircraft/N480TR): [Adlr Heli Inc Owner Trustee](https://openairdocs.org/faa-owner/ADLR%20HELI%20INC%20OWNER%20TRUSTEE), [Wilmington, DE](https://openairdocs.org/faa-place/DE/Wilmington), built 2005, S/N 5076
- [N480V](https://openairdocs.org/aircraft/N480V): [Propwash LLC](https://openairdocs.org/faa-owner/PROPWASH%20LLC), [Mesquite, NV](https://openairdocs.org/faa-place/NV/Mesquite), built 2003, S/N 5057
- [N480VA](https://openairdocs.org/aircraft/N480VA): [Fliege Jetzt LLC](https://openairdocs.org/faa-owner/FLIEGE%20JETZT%20LLC), [Loveland, OH](https://openairdocs.org/faa-place/OH/Loveland), built 2016, S/N 5237
- [N480VC](https://openairdocs.org/aircraft/N480VC): [Sn5084 Inc Trustee](https://openairdocs.org/faa-owner/SN5084%20INC%20TRUSTEE), [Wilmington, DE](https://openairdocs.org/faa-place/DE/Wilmington), built 2005, S/N 5084
- [N482MH](https://openairdocs.org/aircraft/N482MH): [Drd Aviation LLC](https://openairdocs.org/faa-owner/DRD%20AVIATION%20LLC), [Park City, UT](https://openairdocs.org/faa-place/UT/Park%20City), built 2005, S/N 5086
- [N483SH](https://openairdocs.org/aircraft/N483SH): [Sharkeys Helicopter Inc](https://openairdocs.org/faa-owner/SHARKEYS%20HELICOPTER%20INC), [West Lebanon, NH](https://openairdocs.org/faa-place/NH/West%20Lebanon), built 2016, S/N 5236
- [N484MH](https://openairdocs.org/aircraft/N484MH): [New Course Aviation Co](https://openairdocs.org/faa-owner/NEW%20COURSE%20AVIATION%20CO), [Golden, CO](https://openairdocs.org/faa-place/CO/Golden), built 2005, S/N 5085
- [N48FS](https://openairdocs.org/aircraft/N48FS): [Owen Jay](https://openairdocs.org/faa-owner/OWEN%20JAY), [Wolf Creek, MT](https://openairdocs.org/faa-place/MT/Wolf%20Creek), built 2006, S/N 5091
- [N48N](https://openairdocs.org/aircraft/N48N): [Enstrom Helicopter Corp](https://openairdocs.org/faa-owner/ENSTROM%20HELICOPTER%20CORP), [Menominee, MI](https://openairdocs.org/faa-place/MI/Menominee), built 2023, S/N 5255
- [N540EH](https://openairdocs.org/aircraft/N540EH): [Enstrom Helicopter Corp](https://openairdocs.org/faa-owner/ENSTROM%20HELICOPTER%20CORP), [Menominee, MI](https://openairdocs.org/faa-place/MI/Menominee), built 2026, S/N 5264
- [N54FS](https://openairdocs.org/aircraft/N54FS): [Couch Aircraft LLC](https://openairdocs.org/faa-owner/COUCH%20AIRCRAFT%20LLC), [Wilmington, DE](https://openairdocs.org/faa-place/DE/Wilmington), built 2006, S/N 5089
- [N56DK](https://openairdocs.org/aircraft/N56DK): [Deka Research & Development Corp](https://openairdocs.org/faa-owner/DEKA%20RESEARCH%20%26%20DEVELOPMENT%20CORP), [Manchester, NH](https://openairdocs.org/faa-place/NH/Manchester), built 2009, S/N 5127
- [N571QX](https://openairdocs.org/aircraft/N571QX): [South County Helicopter LLC](https://openairdocs.org/faa-owner/SOUTH%20COUNTY%20HELICOPTER%20LLC), [Pilot Rock, OR](https://openairdocs.org/faa-place/OR/Pilot%20Rock), built 2005, S/N 5080
- [N60AZ](https://openairdocs.org/aircraft/N60AZ): [Goldleaf Leasing LLC](https://openairdocs.org/faa-owner/GOLDLEAF%20LEASING%20LLC), [Madison, WI](https://openairdocs.org/faa-place/WI/Madison), built 2007, S/N 5106
- [N68LF](https://openairdocs.org/aircraft/N68LF): [Larsen Richard](https://openairdocs.org/faa-owner/LARSEN%20RICHARD), [Rexburg, ID](https://openairdocs.org/faa-place/ID/Rexburg), built 2007, S/N 5114
- [N6EN](https://openairdocs.org/aircraft/N6EN): [Enstrom Helicopter Corp](https://openairdocs.org/faa-owner/ENSTROM%20HELICOPTER%20CORP), [Menominee, MI](https://openairdocs.org/faa-place/MI/Menominee), built 2024, S/N 5258
- [N753BF](https://openairdocs.org/aircraft/N753BF): [Ais Construction Equipment](https://openairdocs.org/faa-owner/AIS%20CONSTRUCTION%20EQUIPMENT), [Grand Rapids, MI](https://openairdocs.org/faa-place/MI/Grand%20Rapids), built 2006, S/N 5090
- [N8652Q](https://openairdocs.org/aircraft/N8652Q): [Enstrom Helicopter Corp](https://openairdocs.org/faa-owner/ENSTROM%20HELICOPTER%20CORP), [Menominee, MI](https://openairdocs.org/faa-place/MI/Menominee), built 2015, S/N 5223
- [N89GP](https://openairdocs.org/aircraft/N89GP): [Osprey Aviation LLC](https://openairdocs.org/faa-owner/OSPREY%20AVIATION%20LLC), [Green Bay, WI](https://openairdocs.org/faa-place/WI/Green%20Bay), built 2007, S/N 5105

All 51: https://openairdocs.org/engine/rolls-royce-250-c20w/aircraft.md

## NTSB investigations (6)

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 WPR20CA171](https://openairdocs.org/ntsb/WPR20CA171), Jun 4, 2020: Enstrom 480 (N130JS), Murphy, ID, substantial damage. Probable cause: The pilot's failure to maintain clearance from a power line while maneuvering during an aerial application flight.
- [NTSB CEN18LA106](https://openairdocs.org/ntsb/CEN18LA106), Feb 13, 2018: Schweizer 269D (N471RA), Stockbridge, MI, substantial damage. Probable cause: The pilot’s failure to maintain adequate clearance from terrain while maneuvering the helicopter at a low altitude after departure. Contributing to the accident were the pilot’s distraction by the…
- [NTSB ERA17WA183](https://openairdocs.org/ntsb/ERA17WA183), May 10, 2017: Enstrom Helicopter 480B (N480W), Fundres, Italy, destroyed, 1 fatal
- [NTSB CEN09WA390](https://openairdocs.org/ntsb/CEN09WA390), May 28, 2009: Enstrom Helicopter 480B (N878EE), Dominican Republic, Dominican Republic, substantial damage, 1 fatal
- [NTSB DFW08TA137](https://openairdocs.org/ntsb/DFW08TA137), May 9, 2008: Schweizer 269D (N584PM), San Antonio, TX, substantial damage. Probable cause: The pilot's failure to compensate for the excessive rate of descent on final approach. A contributing factor was the reported down draft.
- [NTSB DEN05LA102](https://openairdocs.org/ntsb/DEN05LA102), Jun 29, 2005: Enstrom 480B (N480EH), Scofield, UT, substantial damage. Probable cause: the pilot's failure to maintain control of the helicopter. Contributing factor's include the pilot's failure to maintain clearance from terrain.

## FAA accident and incident reports (6)

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 20200604022119A](https://openairdocs.org/incident/20200604022119A), Jun 4, 2020: Enstrom Helicopter Corp 480 (N130JS), Murphy, ID, Substantial damage. Pilot said he dropped down, was spot spraying white top, as he was going down a draw/meadow grassy area, shut off, ascended 100 to 125 ft, to proceed down the…
- [Accident 20180213002609A](https://openairdocs.org/incident/20180213002609A), Feb 13, 2018: Schweizer 269D (N471RA), Stockbridge, MI, Substantial damage. On 02/13/2018 at approximately 14:15 pm EST aircraft N471RA departed hangar located at 4624 parman rd. in Stockbridge, MI. With one pilot and one female…
- [Accident 20140516010989A](https://openairdocs.org/incident/20140516010989A), May 16, 2014: Enstrom Helicopter Corp 480B (N306RP), Punta Cana, Destroyed. The dominican republic aviation authority should questions the pilot ability to perform a successfull autorotation. The area shown in the pictures of the…
- [Incident 20101230054229I](https://openairdocs.org/incident/20101230054229I), Dec 30, 2010: Schweizer 269D (N584PM), San Antonio, TX, No damage. During cruise flight, the engine started to surge. Pilot did a precautionary landing on the highway.
- [Accident 20080509833499A](https://openairdocs.org/incident/20080509833499A), May 9, 2008: Scwzer 269D (N584PM), San Antonio, TX, Substantial damage. (-23) Pilot stated that he and another pilot were practicing auto-rotations. On the last auto-rotation he was too low and the helicopter hit the ground hard.…
- [Accident 20050629011989A](https://openairdocs.org/incident/20050629011989A), Jun 29, 2005: Enstrm ENSTROM480 (N480EH), Scofield, UT, Substantial damage. (-23) Pilot was conducting a low level photo mission of property. Pressure altitude was approximately 7,435 MSL, temperature 24 degrees c, calculation…

## Service difficulty reports (3)

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

- [SDR 2012FA0000327](https://openairdocs.org/sdr/2012FA0000327), May 9, 2012: IMPELLER. CRACKED. OIL COOLER IMPELLER WAS INSPECTED FOR CRACKS IN THE BLADE/SHOUD REGION IAW MFG RECOMMENDATIONS EVERY 100 HRS OF OPERATION. 2 CRACKS WERE CONFIRMED AND SEVERAL O
- [SDR 2012FA0000328](https://openairdocs.org/sdr/2012FA0000328), May 9, 2012: IMPELLER. CRACKED. OIL COOLER IMPELLER WAS INSPECTED FOR CRACKS IN THE BLADE/SHOUD REGION IAW MFG RECOMMENDATIONS EVERY 100 HOURS OF OPERATION. 2 CRACKS WERE CONFIRMED AND SEVERAL
- [SDR 2008FA0000863](https://openairdocs.org/sdr/2008FA0000863), Nov 10, 2008: PINION GEAR. WORN. DURING SHUT-DOWN, PILOTS REPORTED CLUNKING NOISE. UPON FURTHER INSPECTION, NOISE WAS LOCATED AT UPPER PULLEY SPRAG CLUTCH AREA. REMOVED UPPER PULLEY AND FOUND M

## STCs that may be installed (OpenAirDocs) (4)

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 SE5511NM](https://openairdocs.org/stc/SE5511NM): Installation of compressor discharge pressue (PC) valve. Bell Helicopter Textron Inc
- [STC SE00014EN](https://openairdocs.org/stc/SE00014EN): Installation of the Pratt & Whitney Engine Services, Inc. CrossCheck Engine Monitor Kit P/N HUMS-K-071-1, Rev. A on the specified PT6A engine models and kit P/N HUMS-K-071-2 on the specified A250 engine models. Pratt & Whitney Engine Services Inc
- [STC SE00027EN](https://openairdocs.org/stc/SE00027EN): Installation of Pratt & Whitney Engine Services Inc. Intellistart plus electronic control unit (ECU), P/N DPU-K-010 on the specified 250 engine models. Pratt & Whitney Engine Services Inc
- [STC ST00037AT](https://openairdocs.org/stc/ST00037AT): Unison igniter plugs, P/N 9044400-1. Unison Industries

## PMA parts (OpenAirDocs) (502, 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.

- [WF336343](https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID120637938120250602133029.0001): Filter Element, Fuel. Donaldson Company Inc · PMA PQ2432CE · Replaces 6895177 · May 23, 2025
- [2691794HT](https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID192280472920240802140700.0001): Bearing, Ball (Drive). HYE-Tech Manufacturing LLC · PMA PQ2317NM · Replaces 2691794 · Apr 4, 2024
- [82010546-001HT](https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID198764457620230717173048.0001): Bearing, Ball (Drive). HYE-Tech Manufacturing LLC · PMA PQ2317NM · Replaces 82010546-001 · May 22, 2023
- [82010580-001HT](https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID163424415620230717173050.0001): Grease, Aircraft Bearing. HYE-Tech Manufacturing LLC · PMA PQ2317NM · Replaces 82010580-001 · May 22, 2023
- [2549178](https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID170577252320230907182155.0001): Power Turbine Governor. Honeywell International Inc. · PMA PQ1222NM · Replaces 23076418 · Mar 10, 2023
- [2549170](https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID143676770520230907182154.0001): Power Turbine Governor. Honeywell International Inc. · PMA PQ1222NM · Replaces 23076061 · Mar 10, 2023
- [2549170-2](https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID129926831420230907182152.0001): Governor Assembly, Power Turbine. Honeywell International Inc. · PMA PQ1222NM · Replaces 23086749 · Mar 10, 2023
- [2549178-2](https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID122111198220230907182153.0001): Governor Assembly, Power Turbine. Honeywell International Inc. · PMA PQ1222NM · Replaces 23086773 · Mar 10, 2023
- [E250-10416](https://drs.faa.gov/browse/excelExternalWindow/B2AA8EBA3598CB71862585910054A0AE.0001): Shaft, Power Turbine, Outer. Extex Engineered Products Inc · PMA PQ2203NM · Replaces M250-10416 · Jan 6, 2020
- [6843361HT](https://drs.faa.gov/browse/excelExternalWindow/FEFFC83511F3456B862585500062B6AE.0001): Cage, Ball Bearing-1.024 ID X .312 Wide (and Oversizes). HYE-Tech Manufacturing LLC · PMA PQ2317NM · Replaces 6843361 · Apr 30, 2019
- [2537525HT](https://drs.faa.gov/browse/excelExternalWindow/FE2CFD93295E4A9586258550006312B3.0001): Shaft, Shouldered, Eccentric. HYE-Tech Manufacturing LLC · PMA PQ2317NM · Replaces 2537525 · Apr 30, 2019
- [2539533HT](https://drs.faa.gov/browse/excelExternalWindow/FDF710A0D9BAAADD8625855000632B9C.0001): Bearing, Sintered. HYE-Tech Manufacturing LLC · PMA PQ2317NM · Replaces 2539533 · Apr 30, 2019
- [951190HT](https://drs.faa.gov/browse/excelExternalWindow/FC8B8869AAFBA24A8625855000632D54.0001): Pin, Sraight, Headless. HYE-Tech Manufacturing LLC · PMA PQ2317NM · Replaces 951190 · Apr 30, 2019
- [2521745HT](https://drs.faa.gov/browse/excelExternalWindow/FB5437CD05C715928625855000631007.0001): Pin, Straight, Headed. HYE-Tech Manufacturing LLC · PMA PQ2317NM · Replaces 2521745 · Apr 30, 2019
- [2523123HT](https://drs.faa.gov/browse/excelExternalWindow/F7ED1DCCD5F726178625855000635A58.0001): Diaphragm. HYE-Tech Manufacturing LLC · PMA PQ2317NM · Replaces 2523123 · Apr 30, 2019
- [47070HT](https://drs.faa.gov/browse/excelExternalWindow/F7B8FBB13C3754EE8625855000633D7A.0001): Body, Fuel Nozzle. HYE-Tech Manufacturing LLC · PMA PQ2317NM · Replaces 47070 · Apr 30, 2019
- [6875104HT](https://drs.faa.gov/browse/excelExternalWindow/F7976EEE0864C0FC8625855000629713.0001): Washer, Flat-.190I.D. X.312X.031 THK, AMS 5516. HYE-Tech Manufacturing LLC · PMA PQ2317NM · Replaces 6875104 · Apr 30, 2019
- [H250-10113](https://drs.faa.gov/browse/excelExternalWindow/F79503304C39D6A78625855000638D3A.0001): Race, Bearing Inner, 20mm I.D.. HYE-Tech Manufacturing LLC · PMA PQ2317NM · Replaces M250-10113 · Apr 30, 2019
- [6856986HT](https://drs.faa.gov/browse/excelExternalWindow/F71D7C1A9289065F862585500062C13F.0001): Poppet & Seat Assy. Anti-Icing Valve. HYE-Tech Manufacturing LLC · PMA PQ2317NM · Replaces 6856986 · Apr 30, 2019
- [23073355](https://drs.faa.gov/browse/excelExternalWindow/F65CBF7AF67669F38625855000633C45.0001): Valve, Servo-Compressor Bleed. HYE-Tech Manufacturing LLC · PMA PQ2317NM · Replaces 23073355 · Apr 30, 2019
- [197498HT](https://drs.faa.gov/browse/excelExternalWindow/F58363F6C29A0E2C8625855000636674.0001): Nut, Self-Locking. HYE-Tech Manufacturing LLC · PMA PQ2317NM · Replaces 197498 · Apr 30, 2019
- [23004513HT](https://drs.faa.gov/browse/excelExternalWindow/F536F4331CB36E2186258550006314B5.0001): Seal, Plain-Encased. HYE-Tech Manufacturing LLC · PMA PQ2317NM · Replaces 23004513 · Apr 30, 2019
- [2539728HT](https://drs.faa.gov/browse/excelExternalWindow/F443067B0718FDB0862585500062E5F1.0001): Seat, Bellows. HYE-Tech Manufacturing LLC · PMA PQ2317NM · Replaces 2539728 · Apr 30, 2019
- [6853463HT](https://drs.faa.gov/browse/excelExternalWindow/F3D6B2D89D6786D486258550006375D6.0001): Tube Assy., Scav. -Oil- Gasifier Turbine Support to Accessory Hsg. HYE-Tech Manufacturing LLC · PMA PQ2317NM · Replaces 6853463 · Apr 30, 2019
- [6896098HT](https://drs.faa.gov/browse/excelExternalWindow/F32E4B1478DF1131862585500062F93E.0001): Seal, Labyrinth-Gasifier Turbine Forward. HYE-Tech Manufacturing LLC · PMA PQ2317NM · Replaces 6896098 · Apr 30, 2019
- [6808392HT](https://drs.faa.gov/browse/excelExternalWindow/F327858FDC6FA3FD862585500062EFB3.0001): Nut-Spanner, 27/32-32Thd. HYE-Tech Manufacturing LLC · PMA PQ2317NM · Replaces 6808392 · Apr 30, 2019
- [6844169HT](https://drs.faa.gov/browse/excelExternalWindow/EEA08B5CE9D50D858625855000632609.0001): Tube Assy., Fuel Control to Fire Shield. HYE-Tech Manufacturing LLC · PMA PQ2317NM · Replaces 6844169 · Apr 30, 2019
- [6877277HT](https://drs.faa.gov/browse/excelExternalWindow/ED89264E3E345B9F86258550006327C1.0001): Tube Assy., Press. Fuel Control to Accumulator. HYE-Tech Manufacturing LLC · PMA PQ2317NM · Replaces 6877277 · Apr 30, 2019
- [2539170HT](https://drs.faa.gov/browse/excelExternalWindow/ED10E7C1F7943A5C862585500063453A.0001): Lever Assembly, CAM Follower Lever. HYE-Tech Manufacturing LLC · PMA PQ2317NM · Replaces 2539170 · Apr 30, 2019
- [6890040HT](https://drs.faa.gov/browse/excelExternalWindow/EAB4262CF5DCF6B1862585500062F849.0001): Shield Assy., Turbine Nozzle 1st Stage. HYE-Tech Manufacturing LLC · PMA PQ2317NM · Replaces 6890040 · Apr 30, 2019
- [2539641HT](https://drs.faa.gov/browse/excelExternalWindow/EAAC9B4FF82FDB5186258550006333E2.0001): Spring, Helical, Extension. HYE-Tech Manufacturing LLC · PMA PQ2317NM · Replaces 2539641 · Apr 30, 2019
- [6856984HT](https://drs.faa.gov/browse/excelExternalWindow/E8ADCF843602D53C862585500062BF66.0001): Body, Valve-Anti-Icing. HYE-Tech Manufacturing LLC · PMA PQ2317NM · Replaces 6856984 · Apr 30, 2019
- [6876030HT](https://drs.faa.gov/browse/excelExternalWindow/E79234C7BBF9CF68862585500062FEEB.0001): Stud, Shouldered, Stepped-.250-28x.500-16x1.374LG.. HYE-Tech Manufacturing LLC · PMA PQ2317NM · Replaces 6876030 · Apr 30, 2019
- [6876925HT](https://drs.faa.gov/browse/excelExternalWindow/E50B21DEC0893A14862585500062E284.0001): Tube Assy., Oil Filter Inlet. HYE-Tech Manufacturing LLC · PMA PQ2317NM · Replaces 6876925 · Apr 30, 2019
- [23032283HT](https://drs.faa.gov/browse/excelExternalWindow/E406BEB5470E1FE7862585500062DD76.0001): Pinion Bearing Cage Power Turbine. HYE-Tech Manufacturing LLC · PMA PQ2317NM · Replaces 23032283 · Apr 30, 2019
- [6844043HT](https://drs.faa.gov/browse/excelExternalWindow/E3DD22AFB6589BF4862585500062A71B.0001): Tube, Oil Transfer. HYE-Tech Manufacturing LLC · PMA PQ2317NM · Replaces 6844043 · Apr 30, 2019
- [6899050HT](https://drs.faa.gov/browse/excelExternalWindow/E20ACA4FAC9A2EAB862585500062863D.0001): Valve-Poppet, CPRSR Bleed. HYE-Tech Manufacturing LLC · PMA PQ2317NM · Replaces 6899050 · Apr 30, 2019
- [336132HT](https://drs.faa.gov/browse/excelExternalWindow/E07190E2A02F10498625855000636717.0001): Tapered Pin, Split. HYE-Tech Manufacturing LLC · PMA PQ2317NM · Replaces 336132 · Apr 30, 2019
- [6853446HT](https://drs.faa.gov/browse/excelExternalWindow/DF8E0D4DBF0B1EA9862585500062B018.0001): Shaft, Gear-Oil Pump. HYE-Tech Manufacturing LLC · PMA PQ2317NM · Replaces 6853446 · Apr 30, 2019
- [6899051HT](https://drs.faa.gov/browse/excelExternalWindow/DF724C028D881CAF8625855000628826.0001): Valve, Servo-Compressor Bleed. HYE-Tech Manufacturing LLC · PMA PQ2317NM · Replaces 6899051 · Apr 30, 2019
- [2520570HT](https://drs.faa.gov/browse/excelExternalWindow/DC7000B2192F14888625855000633F53.0001): Rod. HYE-Tech Manufacturing LLC · PMA PQ2317NM · Replaces 2520570 · Apr 30, 2019
- [6810448HT](https://drs.faa.gov/browse/excelExternalWindow/DAF595A1CC57D376862585500062E13F.0001): Bushing-Sleeve .625 x .815 x .437. HYE-Tech Manufacturing LLC · PMA PQ2317NM · Replaces 6810448 · Apr 30, 2019
- [6876741HT](https://drs.faa.gov/browse/excelExternalWindow/DAD145C0601221568625855000636F8D.0001): Stud, Welding- Percussion .190-32 UNJF-3A. HYE-Tech Manufacturing LLC · PMA PQ2317NM · Replaces 6876741 · Apr 30, 2019
- [951388HT](https://drs.faa.gov/browse/excelExternalWindow/DA66A5873365EBC9862585500063070A.0001): Packing, Preformed O Ring. HYE-Tech Manufacturing LLC · PMA PQ2317NM · Replaces 951388 · Apr 30, 2019
- [2539034HT](https://drs.faa.gov/browse/excelExternalWindow/D854B45671A2734E862585500063447F.0001): Weight. HYE-Tech Manufacturing LLC · PMA PQ2317NM · Replaces 2539034 · Apr 30, 2019
- [6848471HT](https://drs.faa.gov/browse/excelExternalWindow/D56C5A805DBB39DB8625855000634EEA.0001): Tube, Assy., Pressure, Oil Check Valve To Fire Shield. HYE-Tech Manufacturing LLC · PMA PQ2317NM · Replaces 6848471 · Apr 30, 2019
- [6890909HT](https://drs.faa.gov/browse/excelExternalWindow/D3CFDDD1AC5180DE862585500062896E.0001): Jet, Compressor Bleed Valve. HYE-Tech Manufacturing LLC · PMA PQ2317NM · Replaces 6890909 · Apr 30, 2019
- [6852176HT](https://drs.faa.gov/browse/excelExternalWindow/D2E81DF924CBABBF862585500062BB43.0001): Guide Assy., Poppet-Anti-Icing Valve. HYE-Tech Manufacturing LLC · PMA PQ2317NM · Replaces 6852176 · Apr 30, 2019
- [2537956HT](https://drs.faa.gov/browse/excelExternalWindow/D20327EF0618F354862585500063323E.0001): Pin, Shoulder, Headless. HYE-Tech Manufacturing LLC · PMA PQ2317NM · Replaces 2537956 · Apr 30, 2019
- [951390HT](https://drs.faa.gov/browse/excelExternalWindow/D0B5B6870CEFAA55862585500063078F.0001): Packing, Preformed O Ring. HYE-Tech Manufacturing LLC · PMA PQ2317NM · Replaces 951390 · Apr 30, 2019

All of them: https://openairdocs.org/engine/rolls-royce-250-c20w/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.