# NTSB investigations, WY: Loss of engine power(partial) - 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 DEN04LA136](https://openairdocs.org/ntsb/DEN04LA136.md): Cessna 182 · Gillette, WY · Accident · No injuries · Limited investigation · Final report · Sep 6, 2004 · N2725G · Substantial damage
  > improper engine overhaul performed by the mechanic which resulted in the fractured exhaust valve and subsequent partial loss of engine power. Contributing to the accident was the lack of suitable terrain for a forced landing.
- [NTSB DEN04CA096](https://openairdocs.org/ntsb/DEN04CA096.md): Cessna T210J · Cheyenne, WY · Accident · Minor injuries · Data collection · Final report · Jul 3, 2004 · N2KD · Substantial damage
  > the detachment of the nut and bolt that attaches the throttle control cable to the fuel induction due to improper maintenance. Contributing factors were the fiber optics wire, fence, and ditch, and the unavailability of suitable terrain on which to make a…
- [NTSB DEN99LA061](https://openairdocs.org/ntsb/DEN99LA061.md): Mooney M20K · Medicine Bow, WY · Accident · No injuries · Limited investigation · Final report · Mar 28, 1999 · N12HW · Substantial damage
  > A fluctuating turbine inlet temperature and resulting loss of engine power for undetermined reasons. Factors were the rough, unsuitable terrain on which to make a forced landing.
- [NTSB SEA91LA128](https://openairdocs.org/ntsb/SEA91LA128.md): Enstrom F280C · Baggs, WY · Accident · No injuries · Limited investigation · Final report · Jun 7, 1991 · N5695Y · Substantial damage
  > Exhaust valve failure, resulting in a partial power loss. Contributing factors were low altitude and rough/uneven terrain.
- [NTSB DEN90LA164](https://openairdocs.org/ntsb/DEN90LA164.md): Mooney M20F · Torrington, WY · Accident · No injuries · Limited investigation · Final report · Jul 14, 1990 · N6456Q · Substantial damage
  > A partial loss of power due to a failed exhaust valve. A factor was the lack of suitable terrain for the forced landing.
- [NTSB DEN89LA122](https://openairdocs.org/ntsb/DEN89LA122.md): Cessna 175 · Sheridan, WY · Accident · No injuries · Limited investigation · Final report · May 21, 1989 · N7557M · Substantial damage
  > Binding (stuck) #4 exhaust valve. High vegetation (hay) and a hidden obstruction (ditch) were contributing factors.
- [NTSB DEN88FA121](https://openairdocs.org/ntsb/DEN88FA121.md): Piper PA-28-180 · Rock Springs, WY · Accident · 2 fatal · Field investigation · Final report · Jun 4, 1988 · N9728J · Destroyed
  > Shortly after departure on the second leg of a cross country flt the plt informed the fss located on the arpt that he was returning. The fss technician on duty observed the acft turn final at an abnormally low altitude. The acft disappeared from view. The…
- [NTSB DEN84LA201](https://openairdocs.org/ntsb/DEN84LA201.md): Cessna 177RG · Cheyenne, WY · Accident · No injuries · Limited investigation · Final report · Jun 29, 1984 · N33215 · Substantial damage
  > The aircraft collided with a tree during an emergency landing following loss of throttle control at a low RPM. Examination revealed that an uncertified throttle cable had been installed, it failed at the attachment to the throttle body.
- [NTSB DEN83LA086](https://openairdocs.org/ntsb/DEN83LA086.md): Piper PA-18A-150 · Worland, WY · Accident · No injuries · Limited investigation · Final report · Mar 28, 1983 · N8977D · Substantial damage
  > The acft collided with a ditch and collapsed the landing gear during a forced landing after the engine quit during a ferry flight. The plt refueled the empty right fuel tank and topped-off the left tank with 3 gallons of fuel before the initial takeoff on the…
- [NTSB DEN82FTC08](https://openairdocs.org/ntsb/DEN82FTC08.md): Cessna T210N · Near Laramie, WY · Accident · Minor injuries · Final report · Aug 5, 1982 · N5433A · Substantial damage
  > The pilot reported that on a previous flight, he had an engine problem, in which, he was unable to obtain more than 27 to 28 inches of manifold pressure. He had the engine checked, no problem was found that would have caused the loss of manifold pressure, 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."eventStateOrRegion" = 'WY' 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" = 352)
ORDER BY c."eventDate" DESC, c."ntsbNumber" DESC
```

This list as a web page: https://openairdocs.org/ntsb?occurrence=352&state=WY

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