# AiResearch TPE331-6-251M

- Type: Engine model (FAA registry)
- Registry code: 01521
- Manufacturer (registry): AIRESEARCH
- Model: TPE331-6-251M
- Engine type: Turbo-prop
- Power: 750 hp
- Installed in: 11 registered aircraft
- Page: https://openairdocs.org/engine/airesearch-tpe331-6-251m

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.

None matched.

## Registered aircraft (11)

- [N139JB](https://openairdocs.org/aircraft/N139JB): [Quay Ventures LLC](https://openairdocs.org/faa-owner/QUAY%20VENTURES%20LLC), [Alto, TX](https://openairdocs.org/faa-place/TX/Alto), built 1979, S/N BE-81
- [N2239V](https://openairdocs.org/aircraft/N2239V): [North Star Aviation Inc](https://openairdocs.org/faa-owner/NORTH%20STAR%20AVIATION%20INC), [Ulysses, KS](https://openairdocs.org/faa-place/KS/Ulysses), S/N G6-144
- [N28AF](https://openairdocs.org/aircraft/N28AF): [Eumundi Trading Co Inc](https://openairdocs.org/faa-owner/EUMUNDI%20TRADING%20CO%20INC), [Wilmington, DE](https://openairdocs.org/faa-place/DE/Wilmington), S/N 241
- [N4109V](https://openairdocs.org/aircraft/N4109V): [Arnt Aerial Spraying Inc](https://openairdocs.org/faa-owner/ARNT%20AERIAL%20SPRAYING%20INC), [Worthington, MN](https://openairdocs.org/faa-place/MN/Worthington), built 2000, S/N G6-154
- [N441KB](https://openairdocs.org/aircraft/N441KB): [One Kilo Bravo LLC](https://openairdocs.org/faa-owner/ONE%20KILO%20BRAVO%20LLC), [Grand Junction, CO](https://openairdocs.org/faa-place/CO/Grand%20Junction), built 1981, S/N 441-0255
- [N441PP](https://openairdocs.org/aircraft/N441PP): [Land Air Sea Inc](https://openairdocs.org/faa-owner/LAND%20AIR%20SEA%20INC), [Chesapeake, VA](https://openairdocs.org/faa-place/VA/Chesapeake), built 1982, S/N 441-0292
- [N687HB](https://openairdocs.org/aircraft/N687HB): [Southern Jets Inc](https://openairdocs.org/faa-owner/SOUTHERN%20JETS%20INC), [Naples, FL](https://openairdocs.org/faa-place/FL/Naples), S/N 687
- [N690AS](https://openairdocs.org/aircraft/N690AS): [Aero Commander N690as LLC](https://openairdocs.org/faa-owner/AERO%20COMMANDER%20N690AS%20LLC), [Kalispell, MT](https://openairdocs.org/faa-place/MT/Kalispell), built 1974, S/N 11277
- [N699AL](https://openairdocs.org/aircraft/N699AL): [Ballard Aviation Inc](https://openairdocs.org/faa-owner/BALLARD%20AVIATION%20INC), [Newton, KS](https://openairdocs.org/faa-place/KS/Newton), built 1980, S/N BE-83
- [N980AK](https://openairdocs.org/aircraft/N980AK): [Universal Pacific Investment Corporation](https://openairdocs.org/faa-owner/UNIVERSAL%20PACIFIC%20INVESTMENT%20CORPORATION), [Portland, OR](https://openairdocs.org/faa-place/OR/Portland), built 1980, S/N 11636
- [N999UP](https://openairdocs.org/aircraft/N999UP): [Mootood LLC](https://openairdocs.org/faa-owner/MOOTOOD%20LLC), [Kingshill, VI](https://openairdocs.org/faa-place/VI/Kingshill), built 1982, S/N 1557S.A.

## NTSB investigations (5)

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 CEN25LA304](https://openairdocs.org/ntsb/CEN25LA304), Aug 6, 2025: Ayres S2R-G6 (N2239V), Slayton, MN, substantial damage, investigation ongoing
- [NTSB ERA16LA320](https://openairdocs.org/ntsb/ERA16LA320), Sep 21, 2016: Beech B100 (N66804), Jackson, TN, substantial damage. Probable cause: The pilot’s improper landing flare, which resulted in a hard landing.
- [NTSB ERA14CA276](https://openairdocs.org/ntsb/ERA14CA276), Jun 3, 2014: Swearingen SA 226AT (N120SC), Dayton, TN, substantial damage. Probable cause: The pilot's failure to extend the landing gear during the approach, which resulted in a gear-up landing.
- [NTSB SEA08LA117](https://openairdocs.org/ntsb/SEA08LA117), May 3, 2008: Rockwell 690C (N980AK), Minden, NV, substantial damage. Probable cause: The collapse of both main landing gear for undetermined reasons.
- [NTSB CHI08CA074](https://openairdocs.org/ntsb/CHI08CA074), Feb 5, 2008: Swearingen SA-226AT (N120SC), Ankeny, IA, substantial damage. Probable cause: The pilot's failure to maintain directional control during the takeoff roll. Contributing to the accident was the snow on the runway and the snowbank.

## FAA accident and incident reports (9)

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 20250806017179A](https://openairdocs.org/incident/20250806017179A), Aug 6, 2025: Ayres Corporation S2R-G6 (N2239V), Slayton, MN, Substantial damage. The company reported the aircraft was overdue to return from aerial application operations. Another aircraft was sent to locate it. The aircraft was located in…
- [Accident 20160921020569A](https://openairdocs.org/incident/20160921020569A), Sep 21, 2016: Beech B100 (N66804), Jackson, TN, Substantial damage. On September 21, 2016 aircraft N66804 a Beech king air (B-100) piloted by[privacy data omitted] left memphis international airport (kmem) at approx. 1600 local…
- [Incident 20150823014919I](https://openairdocs.org/incident/20150823014919I), Aug 23, 2015: Mitsubishi MU-2B-26A (N333RK), Marathon, FL, Minor damage. Aircraft landed on rwy 07, nose gear collapsed on touchdown.
- [Accident 20140602007429A](https://openairdocs.org/incident/20140602007429A), Jun 2, 2014: Swearingen SA-226AT (N120SC), Dayton, TN, Substantial damage. Aircraft landed with landing gear up. Aircraft was lifted and landing gear doors cleaned (mud and grass) and landing gear went down. Outside of gear doors were…
- [Incident 20130221002039I](https://openairdocs.org/incident/20130221002039I), Feb 21, 2013: Swearingen SA-226AT (N120SC), New York, NY, Minor damage. On February 21, 2013 at 2120 EST, a Swearingen, N120SC, registered to mcneely charter service, inc., struck four runway lights while positioning for takeoff at…
- [Incident 20120714013979I](https://openairdocs.org/incident/20120714013979I), Jul 14, 2012: Mitsubishi MU-2B-26A (N333RK), Key West, FL, Minor damage. On 7/14/12 N333RK MU2/U landed on runway 09 at eyw. Upon landing rollout went off side of runway into the gravel area. Pilot and 3 pax not injuried and no…
- [Accident 20080502838289A](https://openairdocs.org/incident/20080502838289A), May 2, 2008: Gulstm 690C (N980AK), Minden, NV, Substantial damage. (-23) The pilot was taxiing out for takeoff and in the ninety degree turn onto the runway he said he heard a bang and the airplane seemed to hop at the same…
- [Accident 20080205010279A](https://openairdocs.org/incident/20080205010279A), Feb 5, 2008: Swrngn SA226AT (N120SC), Ankeny, IA, Substantial damage. (-23) The pilot back taxied runway 18/36 for departure on 36. After getting his release, he began his takeoff roll. About eighty knots, all instruments were…
- [Incident 19980101003609I](https://openairdocs.org/incident/19980101003609I), Jan 1, 1998: Beech B100 (N66804), Tyler, TX, Minor damage. Narrative: pilot stated that during take-off roll at about 800 knots, the left engine made a poof sound. Take-off was terminated and engine secured. Subsequent…

## Service difficulty reports (6)

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

- [SDR CA140131006](https://openairdocs.org/sdr/CA140131006), Jan 29, 2014: WINDOW. DEPARTED. (CAN) WINDOW BLEW OUT AT ALTITUDE RESULTING IN DECOMPRESSION.
- [SDR 2007F00006](https://openairdocs.org/sdr/2007F00006), Dec 26, 2006: CLAMP. CRACKED. CRACK WAS FOUNDING STARTING AT THE DOWL PIN HOLE OF THE BLADE CUFF.
- [SDR MCC2005F00000](https://openairdocs.org/sdr/MCC2005F00000), Sep 23, 2005: FIRE WARNING. INTERMITTENT. RT ENGINE FINE WARNING FLICKERED ONE TIME IN FLIGHT. PILOT SECURED ENGINE AND FEATHERED PROP. UNEVENTFUL LANDING MADE AT MAINTENANCE INSPECTED ENGINE AND FOUND 
- [SDR ODAR018H](https://openairdocs.org/sdr/ODAR018H), Feb 14, 2002: TORQUE LINK. BROKEN. RT MLG TORQUE KNEE FAILED AT UPPER PIVOT PIN. TORQUE KNEE WAS FOUND WITH SECTION MISSING ON INBOARD HALF AND BROKEN ON OUTBOARD SIDE. CRACKS WENT THROUGH GREASE
- [SDR 99ZZZX1417](https://openairdocs.org/sdr/99ZZZX1417), Mar 1, 1999: HOUSING. DAMAGED. THREADS FOR FITTING OF AFT OIL SCAVENGE PUMP LINE, IN ACCESSORY/GEAR HOUSING, STRIP OUT CAUSING OIL LEAK.
- [SDR CA980928019](https://openairdocs.org/sdr/CA980928019), Sep 11, 1998: CARBON SEAL. FAILED. (CAN) THE PILOT OBSERVED FLUCTUATIONS IN TORQUE AND OIL PRESSURE, AS WELL AS VISIBLE OIL VENTING FROM THE ENGINE. THE ENGINE WAS SHUT DOWN AND THE AIRCRAFT LAND

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