# NTSB investigations, WA: 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 ANC26LA098](https://openairdocs.org/ntsb/ANC26LA098.md): Pitts Model 12 · Lake Stevens, WA · Accident · Serious injuries · Class 3 · Limited · Preliminary report · Sep 7, 2026 · N491X · Substantial damage
  > On September 6, 2026, about 1800 Pacific daylight time, an experimental Pitts Model 12 airplane, N491X, was substantially damaged when it was involved in an accident near Lake Stevens, Washington. The pilot sustained serious injuries. The airplane was…
- [NTSB WPR26LA327](https://openairdocs.org/ntsb/WPR26LA327.md): Cessna 150E · Siler, WA · Accident · No injuries · Class 3 · Limited · Preliminary report · Sep 1, 2026 · N3037J · Substantial damage
  > On September 1, 2026, at 1220 Pacific daylight time, a Cessna 150E, N3037J, sustained substantial damage when it was involved in an accident near Siler, Washington. The pilot and pilot rated passenger were not injured. The airplane was operated as a Title 14…
- [NTSB WPR25LA259](https://openairdocs.org/ntsb/WPR25LA259.md): Czech Aircraft Group Sro Sportcruiser · Puyallup, WA · Accident · Serious injuries · Class 3 · Limited · Preliminary report · Aug 25, 2025 · N538SF · Substantial damage
  > On August 25, 2025, about 1456 Pacific daylight time, a Czech Aircraft Group SRO Sportcruiser, N538SF was substantially damaged when it was involved in an accident near Puyallup, Washington. The pilot sustained serious injuries, and the passenger was not…
- [NTSB WPR24LA074](https://openairdocs.org/ntsb/WPR24LA074.md): Beck Michael J Sonex · Auburn, WA · Accident · No injuries · Class 3 · Limited · Final report · Jan 16, 2024 · N920MB · Substantial damage
  > Water contamination within the fuel regulator air-reference system, which resulted in improper fuel metering and a loss of engine power during initial climb.
- [NTSB WPR23LA196](https://openairdocs.org/ntsb/WPR23LA196.md): Cessna 172H · Seattle, WA · Accident · Minor injuries · Class 3 · Limited · Final report · May 19, 2023 · N2550L · Substantial damage
  > A stuck exhaust valve that resulted in a partial loss of engine power and a forced water ditching.
- [NTSB WPR21LA351](https://openairdocs.org/ntsb/WPR21LA351.md): George A. Thiel Just Aircraft Highlander · Monroe, WA · Accident · No injuries · Class 4 · Limited · Final report · Sep 21, 2021 · N488VG · Substantial damage
  > The in-flight malfunction of the throttle control pivot arm, which resulted in a total loss of engine power and the subsequent collision with terrain during the forced landing.
- [NTSB WPR21LA172](https://openairdocs.org/ntsb/WPR21LA172.md): Michael J Robbins Searey · Friday Harbor, WA · Accident · No injuries · Class 4 · Limited · Final report · Apr 22, 2021 · N888MJ · Substantial damage
  > Partial loss of engine power due to the detachment of the throttle cable from the carburetor arm, as a result of the pilot’s inadequate maintenance which resulted in an off-airport landing and impact with vegetation.
- [NTSB WPR21LA161](https://openairdocs.org/ntsb/WPR21LA161.md): Rans S12 · Colville, WA · Accident · 2 fatal · Class 3 · Limited · Final report · Apr 17, 2021 · N707PH · Substantial damage
  > The pilot’s exceedance of the airplane’s critical angle of attack while maneuvering to avoid powerlines, which resulted in an aerodynamic stall and a loss of control. Contributing to the accident was the partial loss of engine power due to improper…
- [NTSB WPR21LA151](https://openairdocs.org/ntsb/WPR21LA151.md): Piper PA-28-140 · Yacolt, WA · Accident · Minor injuries · Class 3 · Limited · Final report · Mar 29, 2021 · N665FL · Substantial damage
  > A partial loss of power caused by carbon build up in the cylinders, which prevented the exhaust valves from seating properly. Contributing to the accident was flying in moderate icing conditions which resulted in reduced aircraft performance and vibrations.
- [NTSB WPR21FA045](https://openairdocs.org/ntsb/WPR21FA045.md): Cessna 177 · Langley, WA · Accident · 2 fatal · Class 3 · Field · Final report · Nov 11, 2020 · N34633 · Substantial damage
  > The flight instructor’s failure to maintain airspeed, which resulted in an aerodynamic stall and subsequent loss of control while attempting to conduct an emergency landing. Contributing to the accident was a total loss of engine power as a result of…
- [NTSB WPR21LA017](https://openairdocs.org/ntsb/WPR21LA017.md): Piper PA28 · Puyallup, WA · Accident · No injuries · Class 3 · Limited · Final report · Oct 18, 2020 · N4673R · Substantial damage
  > A partial loss of engine power as a result of carburetor icing and the flight instructors failure to use carburetor heat.
- [NTSB WPR20LA122](https://openairdocs.org/ntsb/WPR20LA122.md): Buckman Bucks Special · Prescott, WA · Accident · No injuries · Class 3 · Limited · Final report · Apr 9, 2020 · N9065F · Substantial damage
  > Diminished engine performance due to carburetor icing conditions and multiple mechanical anomalies that did not allow for the airplane to attain adequate airspeed during takeoff from a planted field and failure to maintain clearance from obstructions.…
- [NTSB WPR19LA226](https://openairdocs.org/ntsb/WPR19LA226.md): Cessna 177RG · Fall City, WA · Accident · Minor injuries · Class 3 · Limited · Final report · Jul 27, 2019 · N1828Q · Substantial damage
  > The failure of the No. 3 cylinder intake valve that resulted in a partial loss of engine power and a forced landing on uneven terrain.
- [NTSB GAA19CA126](https://openairdocs.org/ntsb/GAA19CA126.md): Cessna 170 · Selah, WA · Accident · No injuries · Data collection · Final report · Jan 27, 2019 · N4087V · Substantial damage
  > The pilot's failure to use carburetor heat while operating in conditions conducive to carburetor icing, which resulted in a partial loss of engine power and a subsequent forced landing and impact with a fence.
- [NTSB ENG18IA003](https://openairdocs.org/ntsb/ENG18IA003.md): Airbus A330-243 · Seattle, WA · Incident · No injuries · Class 3 · Incident · Final report · Nov 7, 2017 · N375HA · Minor damage
  > The loss of control of the left-hand engine and the subsequent thermal damage to the left wing on landing during engine reverse operation was due to a blockage of the variable stator vane torque motor filter that resulted in the engine’s electronic engine…
- [NTSB WPR17LA096](https://openairdocs.org/ntsb/WPR17LA096.md): Piper PA 32-260 · Mukilteo, WA · Accident · Minor injuries · Limited investigation · Final report · May 2, 2017 · N3457W · Substantial damage
  > The improper maintenance of the carburetor, which resulted in a stuck float and a partial loss of engine power during takeoff.
- [NTSB WPR16LA045](https://openairdocs.org/ntsb/WPR16LA045.md): Piper PA18 · Newman Lake, WA · Accident · No injuries · Limited investigation · Final report · Jan 1, 2016 · N2684A · Substantial damage
  > A partial loss of engine power for reasons that could not be determined because postaccident examination of the engine did not reveal any anomalies that would have precluded normal operation.
- [NTSB WPR15LA235](https://openairdocs.org/ntsb/WPR15LA235.md): Cleveland Allan B Nieuport 11# · Bellingham, WA · Accident · Minor injuries · Limited investigation · Final report · Aug 7, 2015 · N917AB · Substantial damage
  > A partial loss of engine power for reasons that could not be determined because postaccident examination revealed no mechanical malfunctions or anomalies that would have precluded normal operation.
- [NTSB WPR15FA181](https://openairdocs.org/ntsb/WPR15FA181.md): Beech F35 · Everett, WA · Accident · 1 fatal · Field investigation · Final report · Jun 10, 2015 · N4224B · Substantial damage
  > The partial loss of engine power during takeoff due to debris within the fuel servo, which restricted fuel flow throughout the engine fuel system and resulted in a partial loss of engine power.
- [NTSB WPR14LA340](https://openairdocs.org/ntsb/WPR14LA340.md): Hughes 269C · Darrington, WA · Accident · No injuries · Limited investigation · Final report · Aug 11, 2014 · N7432F · Substantial damage
  > Maintenance personnel’s failure to secure the throttle mount bracket during a recent engine installation, which resulted in the loss of throttle movement and an inability to control engine power.
- [NTSB WPR14LA298](https://openairdocs.org/ntsb/WPR14LA298.md): Piper PA 30 · Othello, WA · Accident · No injuries · Limited investigation · Final report · Jul 17, 2014 · N7981Y · Substantial damage
  > The partial loss of engine power for reasons that could not be determined based on the available information.
- [NTSB WPR14FA226](https://openairdocs.org/ntsb/WPR14FA226.md): North American AT 6C · Buckley, WA · Accident · 2 fatal · Field investigation · Final report · Jun 4, 2014 · N13372 · Substantial damage
  > The loss of engine power during takeoff initial climb for reasons that could not be determined during a postaccident examination of the airplane.
- [NTSB WPR13CA327](https://openairdocs.org/ntsb/WPR13CA327.md): Stearman C3-B · Everett, WA · Accident · No injuries · Data collection · Final report · Jul 12, 2013 · N6101H · Substantial damage
  > The pilot's failure to maintain directional control during landing, which resulted in a ground loop.
- [NTSB WPR13CA252](https://openairdocs.org/ntsb/WPR13CA252.md): Cessna 172A · Eatonville, WA · Accident · Minor injuries · Data collection · Final report · May 31, 2013 · N7701T · Substantial damage
  > A partial loss of engine power due to carburetor icing and the pilot's failure to maintain adequate airspeed during a go-around, which resulted in a stall.
- [NTSB WPR13LA101](https://openairdocs.org/ntsb/WPR13LA101.md): Cessna 150L · Matlock, WA · Accident · No injuries · Limited investigation · Final report · Jan 24, 2013 · N18690 · Substantial damage
  > A partial loss of engine power after a descent to a lower altitude due to the student pilot's delayed action in applying carburetor heat while operating in conditions conducive to carburetor icing.
- [NTSB WPR12LA356](https://openairdocs.org/ntsb/WPR12LA356.md): Rockwell S2R · Royal City, WA · Accident · Minor injuries · Limited investigation · Final report · Aug 14, 2012 · N8468V · Substantial damage
  > The loss of engine power due to the separation of the No. 2 cylinder exhaust rocker boss housing, which prevented the exhaust valve from opening.
- [NTSB WPR12LA099](https://openairdocs.org/ntsb/WPR12LA099.md): Cessna 172M · Cusick, WA · Accident · No injuries · Limited investigation · Final report · Feb 9, 2012 · N5100R · Substantial damage
  > A total loss of engine power during cruise flight for reasons that could not be determined because postaccident examination did not reveal any anomalies that would have precluded normal operation.
- [NTSB WPR11LA391](https://openairdocs.org/ntsb/WPR11LA391.md): Luscombe 8A · Cowiche, WA · Accident · No injuries · Limited investigation · Final report · Aug 18, 2011 · N1444K · Substantial damage
  > A partial loss of engine power during maneuvering flight due to an exhaust valve failure.
- [NTSB WPR11LA369](https://openairdocs.org/ntsb/WPR11LA369.md): Cessna 140 · Wilkeson, WA · Accident · No injuries · Limited investigation · Final report · Aug 4, 2011 · N2199N · Substantial damage
  > A partial loss of engine power during takeoff due to water contamination in the fuel system.
- [NTSB WPR11LA340](https://openairdocs.org/ntsb/WPR11LA340.md): Piper PA-24-250 · Lopez, WA · Accident · No injuries · Limited investigation · Final report · Jul 17, 2011 · N5532P · Substantial damage
  > A partial loss of engine power due to a cracked engine case near the rear cylinder.
- [NTSB WPR11LA291](https://openairdocs.org/ntsb/WPR11LA291.md): Richard Challenger II · Moses Lake, WA · Accident · Serious injuries · Limited investigation · Final report · Jun 27, 2011 · N9103L · Substantial damage
  > A loss of engine power during the initial climb for reasons that could not be determined because postaccident examination did not reveal any anomalies that would have precluded normal operation.
- [NTSB WPR11LA209](https://openairdocs.org/ntsb/WPR11LA209.md): Cessna 182B · Colville, WA · Accident · No injuries · Limited investigation · Final report · Apr 23, 2011 · N8435T · Substantial damage
  > The partial loss of engine power during takeoff for reasons that could not be determined because postaccident examination revealed no mechanical malfunctions or failures that would have precluded normal operation.
- [NTSB WPR11FA029](https://openairdocs.org/ntsb/WPR11FA029.md): Cessna 340A · Morton, WA · Accident · 3 fatal · Field investigation · Final report · Oct 25, 2010 · N68718 · Substantial damage
  > The pilot’s failure to arrest the excessive rate of turn into the failed engine, which resulted in a loss of control and subsequent impact with terrain. Contributing to the accident was a partial loss of engine power for reasons that could not be determined…
- [NTSB WPR10LA139](https://openairdocs.org/ntsb/WPR10LA139.md): Grumman Acft ENG Cor-Schweizer G-164B · Colfax, WA · Accident · No injuries · Limited investigation · Final report · Feb 18, 2010 · N6774Q · Substantial damage
  > A partial loss of engine power due to carburetor ice as a result of the pilot's failure to use carburetor heat.
- [NTSB WPR10LA122](https://openairdocs.org/ntsb/WPR10LA122.md): Grumman Acft ENG Cor-Schweizer G-164B · Pullman, WA · Accident · No injuries · Limited investigation · Final report · Jan 30, 2010 · N6799K · Substantial damage
  > A partial loss of engine power during takeoff due to a bird's nest being sucked into the induction air ducting.
- [NTSB WPR09CA186](https://openairdocs.org/ntsb/WPR09CA186.md): Air Creation Clipper 58 · Anacortes, WA · Accident · Minor injuries · Data collection · Final report · Apr 9, 2009 · N5138J · Substantial damage
  > The partial loss of engine power due to the passenger's inadvertent movement of the engine throttle control.
- [NTSB WPR09LA022](https://openairdocs.org/ntsb/WPR09LA022.md): Stinson 108-1 · Concrete, WA · Accident · 1 fatal · Limited investigation · Final report · Oct 23, 2008 · N97946 · Substantial damage
  > The loss of engine power during initial climb due to the pilot's improper exhaust system maintenance, which resulted in restriction of the carburetor's air intake.

## 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" = 'WA' 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=WA

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