# NTSB investigations, IA: Loss of engine power (partial)

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 CEN26LA259](https://openairdocs.org/ntsb/CEN26LA259.md): Robinson Helicopter R44 · Adair, IA · Accident · No injuries · Class 3 · Limited · Preliminary report · Jul 18, 2026 · N484AT · Substantial damage
  > On July 18, 2026, about 1440 central daylight time, a Robinson Helicopter Company R44, N484AT, was substantially damaged when it was involved in an accident near Adair, Iowa. The pilot was not injured. The helicopter was operated as a Title 14 Code of Federal…
- [NTSB CEN26LA100](https://openairdocs.org/ntsb/CEN26LA100.md): Piper PA 46-350P · Sioux City, IA · Accident · No injuries · Class 3 · Limited · Preliminary report · Jan 24, 2026 · N91MK · Substantial damage
  > On January 24, 2026, about 0712 central daylight time, a Piper PA-46-350P airplane, N91MK, was substantially damaged when it was involved in an accident near Sioux City, Iowa. The pilot and passenger were uninjured. The airplane was operated as a Title 14…
- [NTSB CEN23LA273](https://openairdocs.org/ntsb/CEN23LA273.md): Berkut 540 · Cedar Rapids, IA · Accident · No injuries · Class 3 · Limited · Final report · Jul 1, 2023 · N567JS · Substantial damage
  > A partial loss of engine power during the test flight due to multiple ignition system anomalies.
- [NTSB CEN23LA076](https://openairdocs.org/ntsb/CEN23LA076.md): Cessna 182M · Council Bluffs, IA · Accident · No injuries · Class 3 · Limited · Final report · Jan 5, 2023 · N71494 · Substantial damage
  > The partial loss of engine power for reasons that could not be determined.
- [NTSB CEN23LA009](https://openairdocs.org/ntsb/CEN23LA009.md): Yates Mike E Roaring Eagle · Stanwood, IA · Accident · Minor injuries · Class 4 · Limited · Final report · Oct 9, 2022 · N181MY · Substantial damage
  > The pilot’s exceedance of the airplane’s critical angle of attack in the traffic pattern, which resulted in an aerodynamic stall and loss of airplane control at too low of an altitude to recover. Contributing to the accident was the partial loss of engine…
- [NTSB CEN22LA354](https://openairdocs.org/ntsb/CEN22LA354.md): Air Tractor AT-301 · Lamoni, IA · Accident · No injuries · Class 3 · Limited · Final report · Aug 1, 2022 · N4326S · Destroyed
  > A loss of airplane performance for reasons that could not be determined.
- [NTSB CEN22LA146](https://openairdocs.org/ntsb/CEN22LA146.md): Hughes 369 · Adair, IA · Accident · Minor injuries · Class 3 · Limited · Final report · Mar 17, 2022 · N500MZ · Substantial damage
  > The mechanic’s failure to properly torque a fuel control unit B-nut, which resulted in a partial loss of engine power, an attempted autorotation, and an impact with terrain.
- [NTSB CEN18LA278](https://openairdocs.org/ntsb/CEN18LA278.md): Aero Commander S2R · Vinton, IA · Accident · No injuries · Class 3 · Limited · Final report · Jul 17, 2018 · N5553X · Substantial damage
  > Loss of throttle control input due to a failure in the throttle control system. Contributing to the accident was the inadequate inspection and reinstallation of worn parts by maintenance personnel.
- [NTSB CEN17LA156](https://openairdocs.org/ntsb/CEN17LA156.md): Loomis Xenon 4 · Knoxville, IA · Accident · No injuries · Limited investigation · Final report · Apr 17, 2017 · N912XV · Substantial damage
  > A partial loss of engine power for reasons that could not be determined based on the available information. Contributing to the accident was the failure of the owners to obtain proper materials regarding the operation and maintenance of the engine.
- [NTSB CEN16LA320](https://openairdocs.org/ntsb/CEN16LA320.md): Cirrus Design SR20 · Des Moines, IA · Accident · Minor injuries · Limited investigation · Final report · Aug 13, 2016 · N314BF · Destroyed
  > The two separations in the induction system due to improper installation and/or maintenance, which resulted in a partial loss of engine power during initial climb.
- [NTSB CEN16LA032](https://openairdocs.org/ntsb/CEN16LA032.md): Cessna 177RG · Red Oak, IA · Accident · No injuries · Limited investigation · Final report · Oct 8, 2015 · N1542H · Substantial damage
  > The improper torque of the engine’s No. 3 cylinder intake pipe bolts, which resulted in the separation of the pipe and a partial loss of engine power.
- [NTSB CEN15LA377](https://openairdocs.org/ntsb/CEN15LA377.md): Grumman G 164B · Sac City, IA · Accident · No injuries · Limited investigation · Final report · Aug 12, 2015 · N311AL · Substantial damage
  > The loss of engine power for reasons that could not be determined based on the available information.
- [NTSB CEN13LA287](https://openairdocs.org/ntsb/CEN13LA287.md): Piper PA-28-161 · Oskaloosa, IA · Accident · Minor injuries · Limited investigation · Final report · May 18, 2013 · N47539 · Substantial damage
  > The loss of engine power for reasons that could not be determined because the engine examination did not reveal any malfunctions or failures that would have precluded normal operation.
- [NTSB CEN11CA532](https://openairdocs.org/ntsb/CEN11CA532.md): Alon A-2A · Rolfe, IA · Accident · No injuries · Data collection · Final report · Jul 31, 2011 · N5647F · Substantial damage
  > The pilot's decision to execute a precautionary landing to unsuitable terrain.
- [NTSB CEN11LA539](https://openairdocs.org/ntsb/CEN11LA539.md): Hurley Richard A Cavalier SA102.5 · Salem, IA · Accident · Serious injuries · Limited investigation · Final report · Jul 29, 2011 · N115RH · Substantial damage
  > The partial loss of engine power due to the formation of carburetor ice.
- [NTSB CEN11FA436](https://openairdocs.org/ntsb/CEN11FA436.md): Ray Aerial Spraying 773 Racer · Ottumwa, IA · Accident · 1 fatal · Field investigation · Final report · Jun 30, 2011 · N773RY · Destroyed
  > The loss of engine power for reasons that could not be determined because postaccident examination of the airplane’s engine and ignition system did not reveal any anomalies that would have precluded normal operation, and extensive postaccident fire damage…
- [NTSB CEN11LA367](https://openairdocs.org/ntsb/CEN11LA367.md): Jones Cozy Mark IV · Sioux City, IA · Accident · Minor injuries · Limited investigation · Final report · May 30, 2011 · N204TJ · Substantial damage
  > The pilot's improper installation of the gascolator gasket during the airplane's last condition inspection, which resulted in a partial loss of engine power while maneuvering.
- [NTSB CEN09LA534](https://openairdocs.org/ntsb/CEN09LA534.md): WSK PZL Mielec M-18A · Audubon, IA · Accident · No injuries · Limited investigation · Final report · Aug 18, 2009 · N2065B · Substantial damage
  > A loss of engine power due to failure of the compressor turbine resulting from exposure to elevated operating temperatures for undetermined reasons.
- [NTSB CEN09LA451](https://openairdocs.org/ntsb/CEN09LA451.md): Grumman Acft ENG Cor-Schweizer G-164B · Beaman, IA · Accident · No injuries · Limited investigation · Final report · Jul 10, 2009 · N6683K · Substantial damage
  > The loss of engine power during initial climb for undetermined reasons.
- [NTSB CEN09LA403](https://openairdocs.org/ntsb/CEN09LA403.md): Ayres S2R-G6 · Ainsworth, IA · Accident · Serious injuries · Limited investigation · Final report · Jul 1, 2009 · N60015 · Substantial damage
  > A component failure of the fuel control unit, which resulted in a loss of engine power.
- [NTSB CHI08CA213](https://openairdocs.org/ntsb/CHI08CA213.md): Air Tractor AT-401 · Ida Grove, IA · Accident · No injuries · Data collection · Final report · Aug 12, 2008 · N45029 · Substantial damage
  > A failure of the turbocharger blower which resulted in the partial loss of power. Factors associated with the accident were the low altitude of the airplane and the embankment.

## 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" = 'IA' AND c."eventCountry" = 'USA'
  AND c."mKey" IN (SELECT s.case_mkey FROM 'https://openairdocs.org/data/latest/ntsb_events.parquet' s WHERE s."tier2Number" = '342' AND s.case_mkey IN (SELECT case_mkey FROM 'https://openairdocs.org/data/latest/ntsb_events.parquet' WHERE "isDefiningEvent"))
ORDER BY c."eventDate" DESC, c."ntsbNumber" DESC
```

This list as a web page: https://openairdocs.org/ntsb-events/342/sequence?state=IA

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