# NTSB investigations: Allison 250-C20 series: Loss of engine power

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 CHI07LA193](https://openairdocs.org/ntsb/CHI07LA193.md): Hughes 369D · Comfrey, MN · Accident · No injuries · Limited investigation · Final report · Jul 5, 2007 · N500NC · Substantial damage
  > The loss of engine power due to the loose pressure line during aerial application maneuvers which resulted in a hard forced landing.
- [NTSB NYC07LA149](https://openairdocs.org/ntsb/NYC07LA149.md): Messerschmitt BO-105 · Isla de Vieques, PR · Accident · No injuries · Limited investigation · Final report · May 28, 2007 · N911GB · Substantial damage
  > The mechanic's failure to secure the engine governor locking hardware, which resulted in the right engine losing power.
- [NTSB DEN06LA080](https://openairdocs.org/ntsb/DEN06LA080.md): Garlick Helicopters OH- 58C · Muddy Gap, WY · Accident · No injuries · Limited investigation · Final report · May 30, 2006 · N16JD · Substantial damage
  > the loss of engine power for reasons undetermined. Contributing to the accident was the low altitude and rough uneven terrain.
- [NTSB MIA04LA132](https://openairdocs.org/ntsb/MIA04LA132.md): Bell 206L · Gulf of Mexico · Accident · No injuries · Limited investigation · Final report · Sep 29, 2004 · N34CA · Destroyed
  > A loss of engine power for undetermined reasons while on short final to land on an oil platform in the Gulf of Mexico, which resulted in the pilot ditching the helicopter into the water.
- [NTSB SEA04LA181](https://openairdocs.org/ntsb/SEA04LA181.md): Hughes 369D · Cottage Grove, OR · Accident · No injuries · Limited investigation · Final report · Sep 4, 2004 · N505ST · Substantial damage
  > In-flight loss of engine power during cruise for undetermined reasons.
- [NTSB FTW04LA197](https://openairdocs.org/ntsb/FTW04LA197.md): Bell 206B · East Cameron 13 · Accident · Minor injuries · Limited investigation · Final report · Jul 21, 2004 · N133RT · Substantial damage
  > The loss of engine power due to fuel exhaustion. Contributing factors were the fuel quantity gauge's improper fuel level indication, missing instrument placard, company maintenance personnel's improper maintenance records, disregard for company procedures,…
- [NTSB FTW04GA076](https://openairdocs.org/ntsb/FTW04GA076.md): Schweizer 269D · San Antonio, TX · Accident · Minor injuries · Final report · Feb 19, 2004 · N255TP · Substantial damage
  > The loss of engine power due to the axial movement of the compressor rotor blades contacting the compressor vanes resulting in a subsequent compressor stall. A contributing factor was the improper assembly of the compressor section during the engine overhaul…
- [NTSB FTW03LA216](https://openairdocs.org/ntsb/FTW03LA216.md): Bell 206B-3 · Kisatchie, LA · Accident · No injuries · Limited investigation · Final report · Sep 9, 2003 · N197AA · Substantial damage
  > A loss of engine power due to water contamination in the fuel system.
- [NTSB SEA03LA058](https://openairdocs.org/ntsb/SEA03LA058.md): Hughes 369D · Taholah, WA · Accident · Minor injuries · Limited investigation · Final report · Apr 7, 2003 · N5225C · Substantial damage
  > The entanglement of the fuel quantity sender float in the start pump wiring within the fuel tank as a result of the wiring not being properly secured. This rendered the fuel gauge inaccurate and the low fuel warning light inoperative which led to fuel…
- [NTSB FTW02LA117](https://openairdocs.org/ntsb/FTW02LA117.md): Bell 206B · Walnut Hill, TX · Accident · Minor injuries · Limited investigation · Final report · Apr 11, 2002 · N513FD · Substantial damage
  > The loss of engine power as a result of the backing off of the PC air line "B" nut due to the improper installation by the company maintenance personnel. Contributing factors were the inadequate preflight by the pilot and the lack of suitable terrain for the…
- [NTSB FTW02LA102](https://openairdocs.org/ntsb/FTW02LA102.md): Bell 206L-3 · Oakley, UT · Accident · No injuries · Limited investigation · Final report · Mar 26, 2002 · N30YB · Substantial damage
  > The loss of engine power for an undetermined reason. A contributing factor was the lack of suitable terrain for the forced landing.
- [NTSB DEN02LA013](https://openairdocs.org/ntsb/DEN02LA013.md): Bell 206B · Bryce, UT · Accident · Serious injuries · Limited investigation · Final report · Dec 1, 2001 · N911KH · Substantial damage
  > loss of engine power for reasons undetermined. Contributing factors were the low airspeed and altitude at which to perform an autorotation.
- [NTSB CHI01LA119](https://openairdocs.org/ntsb/CHI01LA119.md): Hughes 369D · Du Quoin, IL · Accident · Minor injuries · Limited investigation · Final report · Apr 18, 2001 · N713HT · Destroyed
  > loss of engine power for undetermined reasons, the pilot operating the helicopter outside of the height-velocity curve, and the pilot's failure to maintain control of the helicopter during the emergency landing. Factors relating to the accident were the…
- [NTSB SEA01LA024](https://openairdocs.org/ntsb/SEA01LA024.md): Bell 206 B3 · Lake Kachess, WA · Accident · No injuries · Limited investigation · Final report · Nov 23, 2000 · N2062D · Substantial damage
  > The pilot's failure to comply with the flight manual regarding the use of an induction system deflector kit (snow baffles) while operating in snow, and the ingestion of foreign material/snow that resulted in an engine flameout while hovering. A snow baffle…
- [NTSB LAX99LA237](https://openairdocs.org/ntsb/LAX99LA237.md): Hiller UH-12ET · Williams, CA · Accident · No injuries · Limited investigation · Final report · Jun 30, 1999 · N7173F · Substantial damage
  > The pilot's inadequate preflight planning and verification that fuel was available for the intended flight. A factor was the fuel quantity false indication.
- [NTSB MIA99FA158](https://openairdocs.org/ntsb/MIA99FA158.md): Hughes 369E · Intercession, FL · Accident · 1 fatal · Field investigation · Final report · May 20, 1999 · N144CM · Substantial damage
  > The pilot's improper fuel management that resulted in fuel exhaustion and a total loss of engine power.
- [NTSB SEA98LA024](https://openairdocs.org/ntsb/SEA98LA024.md): Bell 206L · Idaho Falls, ID · Accident · No injuries · Limited investigation · Final report · Dec 16, 1997 · N206LT · Substantial damage
  > loss of engine power for undetermined reason(s). A factor relating to the accident included a dirt berm/ridge in the field where the pilot executed the forced landing.
- [NTSB MIA94LA116](https://openairdocs.org/ntsb/MIA94LA116.md): Bell 206B · Mayaguez, PR · Accident · Serious injuries · Limited investigation · Final report · Apr 10, 1994 · N39125 · Substantial damage
  > Loss of engine power for undetermined reasons which resulted in a descent and ditching.
- [NTSB LAX93LA375](https://openairdocs.org/ntsb/LAX93LA375.md): Bell 206B · Pacific Ocean (Pacific Ocean) · Accident · 2 fatal · Limited investigation · Final report · Sep 22, 1993 · N285CA · Destroyed
  > a loss of engine power for undetermined reasons.
- [NTSB LAX87DUM01](https://openairdocs.org/ntsb/LAX87DUM01.md): Bell UH-1B · Calipatria, CA · Accident · No injuries · Final report · Dec 1, 1986 · N2770N · Substantial damage
  > During the initial climb at the beginning of an aerial application flight, the pilot made a climbing 180 degree right turn in the reverse direction when the rotor RPM began to drop. The pilot continued to raise collective, lost directional control and…

## 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."mKey" IN (SELECT x.case_mkey FROM 'https://openairdocs.org/data/latest/ntsb_aircrafts.parquet' x WHERE x.engine_model_code IN ('03020')
    AND EXISTS (SELECT 1 FROM 'https://openairdocs.org/data/latest/ntsb_occurrences.parquet' o WHERE o.case_mkey = x.case_mkey AND o.aircrafts_position = x.position AND o."occurrenceNumber" = 1 AND o."occurrenceCode" = 350))
ORDER BY c."eventDate" DESC, c."ntsbNumber" DESC
```

This list as a web page: https://openairdocs.org/ntsb?engine=03020&occurrence=350

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