# NTSB investigations, MT: Loss of engine power(total) - mech failure/malf NTSB aviation accident and incident investigations since 1962: the probable cause, findings, aircraft, crew, weather and docket of each, linked to the FAA registry and the FAA’s own reports. ## Latest cases - [NTSB LAX07LA238](https://openairdocs.org/ntsb/LAX07LA238.md): de Havilland Beaver DHC-2 MK.1 · Kalispell, MT · Accident · No injuries · Limited investigation · Final report · Jul 24, 2007 · N6784L · Substantial damage > A loss of engine power due to the failure of the supercharger impeller bushing, which allowed raw oil to enter the induction system. - [NTSB SEA06LA167](https://openairdocs.org/ntsb/SEA06LA167.md): Kinnson Lancair IV-P Turbine · Helena, MT · Accident · Minor injuries · Limited investigation · Final report · Aug 22, 2006 · N514PT · Substantial damage > The total loss of engine power as a result of turbine over temperature due to the pilot's failure to follow proper procedures for engine operation. A contributing factor was the lack of suitable terrain for the ensuing forced landing. - [NTSB SEA06TA153](https://openairdocs.org/ntsb/SEA06TA153.md): Bell 206L-1 · Busby, MT · Accident · No injuries · Final report · Aug 3, 2006 · N5746N · Substantial damage > The improper overhaul of the turbine assembly by maintenance personnel, which resulted in failure of the turbine and a total loss of engine power. A contributing factor was the pilot's misjudgment of the landing flare at the termination of the autorotation. - [NTSB SEA06CA080](https://openairdocs.org/ntsb/SEA06CA080.md): Pitrolo GL-25 · Worden, MT · Accident · No injuries · Data collection · Final report · Apr 21, 2006 · N27EP · Substantial damage > The loss of engine power due to failure of both electronic ignition systems. A contributing factor was the lack of suitable terrain for the forced landing. - [NTSB SEA06LA074](https://openairdocs.org/ntsb/SEA06LA074.md): Central Copters Lancair IV-P · Belgrade, MT · Accident · No injuries · Limited investigation · Final report · Apr 15, 2006 · N671 · Destroyed > The total loss of drive power to the aircraft's propeller while on a visual final approach, due to the decoupling of the quill shaft between the reduction gearbox and the engine power section. Factors include a dark night, no suitable terrain on which to… - [NTSB SEA05LA189](https://openairdocs.org/ntsb/SEA05LA189.md): Ballhagen/Shyrock Q-2 · Kalispell, MT · Accident · No injuries · Limited investigation · Final report · Sep 2, 2005 · N12QJ · Substantial damage > The pilot/owner's improper setting of the engine's valve clearance, leading to the failure of the exhaust valves to fully close and a total loss of power while on a VFR downwind, and the pilot/owner's failure to maintain sufficient airspeed as he tried to… - [NTSB SEA03TA116](https://openairdocs.org/ntsb/SEA03TA116.md): McDonnell Douglas 369E · Big Timber, MT · Accident · Minor injuries · Final report · Jun 25, 2003 · N1502 · Substantial damage > Fretting on the outside diameter of the compressor coupling adapter which resulted in fatigue and subsequent fracture of the adapter, and ultimately the disconnection of the compressor from the turbine assembly. Contributing factors were low rotor RPM, uneven… - [NTSB SEA02FA009](https://openairdocs.org/ntsb/SEA02FA009.md): Cessna 175C · Miles City, MT · Accident · 1 fatal · Field investigation · Final report · Nov 5, 2001 · N8347T · Substantial damage > The separation of the number four cylinder exhaust valve guide from the cylinder head, leading to the failure of the exhaust valve stem and the catastrophic failure of the engine while in cruise flight. Factors include the necessity of attempting a forced… - [NTSB SEA99FA138](https://openairdocs.org/ntsb/SEA99FA138.md): Beech H-35 · Swan Lake, MT · Accident · Serious injuries · Field investigation · Final report · Aug 10, 1999 · N7975D · Substantial damage > Detonation/pre-ignition due to use of improper grade and type of fuel (automotive) and the pilot-in-command's failure to use proper fuel specified by manufacturer's directives. - [NTSB SEA98LA192](https://openairdocs.org/ntsb/SEA98LA192.md): Mayala Dragonfly · Avon, MT · Accident · Minor injuries · Limited investigation · Final report · Sep 30, 1998 · N4478V · Destroyed > Failure of the engine crankshaft aft oil seal resulting in the loss of engine oil, and rough terrain during the forced landing. - [NTSB SEA95LA190](https://openairdocs.org/ntsb/SEA95LA190.md): Mooney M20K · Roundup, MT · Accident · No injuries · Limited investigation · Final report · Aug 22, 1995 · N1154L · Substantial damage > an engine failure due to foreign object ingestion into the oil pump. A ruptured oil inlet screen contributed to the accident. - [NTSB SEA95LA161](https://openairdocs.org/ntsb/SEA95LA161.md): Air Tractor AT-301 · Havre, MT · Accident · No injuries · Limited investigation · Final report · Jul 24, 1995 · N3660U · Substantial damage > the loss of power due to a failure of the cylinder head exhaust valve rocker box. The tall crop encountered during the forced landing is a factor. - [NTSB SEA95LA050](https://openairdocs.org/ntsb/SEA95LA050.md): Beech S-35 · Wolf Point, MT · Accident · No injuries · Limited investigation · Final report · Feb 11, 1995 · N8828M · Substantial damage > The loss of power due to lost oil pressure and a failed connecting rod. Factors include fence posts and dusk lighting conditions which limited visibility. - [NTSB SEA95IA021](https://openairdocs.org/ntsb/SEA95IA021.md): Fairchild SA227 · Missoula, MT · Incident · No injuries · Incident investigation · Final report · Nov 17, 1994 · N380PH · Minor damage > The fatigue failure of the first stage compressor impeller. - [NTSB SEA91LA031](https://openairdocs.org/ntsb/SEA91LA031.md): Beech 3NM · Bozeman, MT · Accident · No injuries · Limited investigation · Final report · Dec 9, 1990 · N9159B · Substantial damage > The failure of the right engine master rod. - [NTSB SEA90LA148](https://openairdocs.org/ntsb/SEA90LA148.md): Bell BH-214 · Thompson Falls, MT · Accident · No injuries · Limited investigation · Final report · Jul 28, 1990 · N314RM · Substantial damage > Crew's encounter with soft terrain while attempting an autorotation landing after the failure of the main rotor drive system. - [NTSB SEA90LA137](https://openairdocs.org/ntsb/SEA90LA137.md): Sikorsky S-58BT · Ovando, MT · Accident · No injuries · Limited investigation · Final report · Jul 16, 1990 · N439DS · Substantial damage > The pilot did not maintain rotor RPM after a compressor assembly blade failure. A related factor was an inadequate autorotation resulting in a hard landing. - [NTSB DEN90LA060](https://openairdocs.org/ntsb/DEN90LA060.md): Cessna T207 · Hungry Horse, MT · Accident · Minor injuries · Limited investigation · Final report · Feb 22, 1990 · N91146 · Destroyed > Failure of the #4 connecting rod. Factors related to the accident were: the adverse weather conditions and lack of suitable terrain for a forced landing. - [NTSB DEN89LA115](https://openairdocs.org/ntsb/DEN89LA115.md): Cessna 182G · St. Xavier, MT · Accident · No injuries · Limited investigation · Final report · May 3, 1989 · N3410S · Substantial damage > The pilot's failure to maintain airspeed while maneuvering for a forced landing following a failure of the number two piston. Contributing to the accident was smoke in the cockpit. - [NTSB DEN88LA137](https://openairdocs.org/ntsb/DEN88LA137.md): Bell 206B3 · Missoula, MT · Accident · No injuries · Limited investigation · Final report · Jun 26, 1988 · N2754A · Substantial damage > A check airman and a commercial plt were performing an instructional flt. During climbout after a practice autorotation, the engine out audio and light warning activated. Both pilots verified an actual engine out and entered an autorotation. The helicopter… - [NTSB DEN88IA083](https://openairdocs.org/ntsb/DEN88IA083.md): Cessna 210 · Billings, MT · Incident · No injuries · Incident investigation · Final report · Mar 17, 1988 · N2180S · Minor damage - [NTSB DEN87LA119](https://openairdocs.org/ntsb/DEN87LA119.md): Cessna A188B · St. Ignatius, MT · Accident · No injuries · Limited investigation · Final report · May 6, 1987 · N9282R · Substantial damage > An ag plt was spraying a field near the local arpt, at 100 feet AGL. During an aerial application maneuver, the engine made a loud bang and stopped. The plt leveled the acft, selected a landing site and landed. During the roll out, the acft crossed an… - [NTSB DEN87LA084](https://openairdocs.org/ntsb/DEN87LA084.md): Air Tractor AT-301 · Conrad, MT · Accident · No injuries · Limited investigation · Final report · Apr 5, 1987 · N23069 · Substantial damage > An ag plt was returning from an aerial application. Six miles from the destination arpt the engine quit. The plt attempted to land on a road but the acft struck the edge of a pit, spun across the road and came to rest facing 180 degrees from the original… - [NTSB DEN86LA040](https://openairdocs.org/ntsb/DEN86LA040.md): Helio H-391B · Bozeman, MT · Accident · No injuries · Limited investigation · Final report · Dec 6, 1985 · N4101D · Substantial damage > According to personnel in the area, the plt radioed he had smoke in the cockpit and was returning to gallantin field, his departure point. Later, the plt transmitted that the eng lost total pwr and he was making a forced landing. During the investigation, it… - [NTSB DEN85LA209](https://openairdocs.org/ntsb/DEN85LA209.md): Stinson 108-1 · Superior, MT · Accident · No injuries · Limited investigation · Final report · Aug 5, 1985 · N8976K · Substantial damage > The plt was flying with his wife on a pleasure flight to Idaho when smoke started coming into the cabin. Engine oil pressure went to zero. The plt secured the engine and made a forced landing to a farmer's field. The acft was substantially damaged; however,… - [NTSB DEN84LA181](https://openairdocs.org/ntsb/DEN84LA181.md): Cessna A188B · Opheim, MT · Accident · No injuries · Limited investigation · Final report · Jun 19, 1984 · N731GL · Substantial damage > The acft was damaged in a forced landing after the engine quit. The plt said that several weeks prior to the accident hediscovered the fuel crossover quick drain was 'frozen' shut and would not drain. He removed the drain to lubricate it and upon… - [NTSB DEN84LA052](https://openairdocs.org/ntsb/DEN84LA052.md): Lake LA-4-200 · Great Falls, MT · Accident · No injuries · Limited investigation · Final report · Dec 28, 1983 · N39451 · Substantial damage > The acft was damaged in a forced landing on a highway after the engine seized. The plt said 'the engine made unusual sounds of an engine running bad.' Then it lost compression and seized. He made a forced landing on a highway and damagedthe hull. Examination… - [NTSB DEN83LA142](https://openairdocs.org/ntsb/DEN83LA142.md): Cessna 182Q · Hysham, MT · Accident · No injuries · Limited investigation · Final report · Jun 16, 1983 · N7506S · Substantial damage > The plt reported that he aborted his x-country flt due to IMC ahead. While returning to billings, MT, oil & smoke started coming from the eng compartment & oil covered his windshield. The eng began losing power, so he shut it down. While making an emergency… ## The whole list in SQL Runs in DuckDB 1.2 or later on the release's Parquet files over HTTPS: ```sql SELECT c."ntsbNumber", c."eventDate", c."eventType", c."eventCity", c."eventStateOrRegion", a.n_number, a."aircraftMake", a."aircraftModel", c."highestInjuryLevel", c."totalFatal", c."completionStatus", c.report_url FROM 'https://openairdocs.org/data/latest/ntsb_case_detail.parquet' c LEFT JOIN 'https://openairdocs.org/data/latest/ntsb_aircrafts.parquet' a ON a.case_mkey = c."mKey" AND a.position = 1 WHERE c."eventStateOrRegion" = 'MT' AND c."eventCountry" = 'USA' AND c."mKey" IN (SELECT o.case_mkey FROM 'https://openairdocs.org/data/latest/ntsb_occurrences.parquet' o WHERE o."occurrenceNumber" = 1 AND o."occurrenceCode" = 351) ORDER BY c."eventDate" DESC, c."ntsbNumber" DESC ``` This list as a web page: https://openairdocs.org/ntsb?occurrence=351&state=MT --- 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.