# NTSB investigations: Lycoming I0360 series: 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 CEN26LA281](https://openairdocs.org/ntsb/CEN26LA281.md): Mooney M20E · Longmont, CO · Accident · No injuries · Class 4 · Limited · Investigation open · Aug 4, 2026 · N3264F · Substantial damage
- [NTSB WPR26LA197](https://openairdocs.org/ntsb/WPR26LA197.md): Mooney M20J · Lake Havasu City, AZ · Accident · Serious injuries · Class 3 · Limited · Preliminary report · May 14, 2026 · N4665H · Substantial damage
  > On May 14, 2026, at 1523, a Mooney M20J, N4665H, was substantially damaged when it was involved in an accident near Lake Havasu City, Arizona. The pilot and two passengers sustained serious injuries. The airplane was operated under Title 14 Code of Federal…
- [NTSB ERA24LA190](https://openairdocs.org/ntsb/ERA24LA190.md): Beech B24R · Lumberton Township, NJ · Accident · Minor injuries · Class 3 · Limited · Final report · Apr 22, 2024 · N53EM · Substantial damage
  > The pilot/owner’s failure to ensure adequate maintenance of the airplane, which resulted in a partial loss of engine power during takeoff.
- [NTSB ERA23FA033](https://openairdocs.org/ntsb/ERA23FA033.md): Beech A24 · Keene, NH · Accident · 2 fatal · Class 3 · Field · Final report · Oct 21, 2022 · N8020R · Destroyed
  > Improper maintenance of the fuel injector nozzles and the pilots’ failure to abort the takeoff during the takeoff roll. Contributing to the accident was the mechanic’s decision to return the airplane to service with the engine unable to attain its full rated…
- [NTSB CEN22LA421](https://openairdocs.org/ntsb/CEN22LA421.md): Piper PA-28R-180 · Broomfield, CO · Accident · No injuries · Class 3 · Limited · Final report · Sep 14, 2022 · N3713T · Substantial damage
  > A partial loss of engine power due to a collapsed induction hose that blocked engine intake airflow.
- [NTSB CEN22LA255](https://openairdocs.org/ntsb/CEN22LA255.md): Mooney M20E · Stillwater, OK · Accident · No injuries · Class 3 · Limited · Final report · Jun 18, 2022 · N5895Q · Substantial damage
  > The inadequate maintenance and inspection of the engine induction air coupling, which impeded airflow to the engine and resulted in the subsequent partial loss of engine power.
- [NTSB ERA22FA261](https://openairdocs.org/ntsb/ERA22FA261.md): Piper PA-28RT-201 · Panama City, FL · Accident · 2 fatal · Class 3 · Field · Final report · Jun 6, 2022 · N160LL · Substantial damage
  > Maintenance personnel’s failure to follow the avionics installation guidance for the oil pressure sensor, which resulted in the high-cycle fatigue failure of an line, oil starvation, and the subsequent loss of engine power. Contributing to the accident was…
- [NTSB ERA21LA361](https://openairdocs.org/ntsb/ERA21LA361.md): Beech C24R · Augustine, FL · Accident · Minor injuries · Class 3 · Limited · Final report · Sep 13, 2021 · N5246M · Substantial damage
  > Improperly installed fuel injection system components, which resulted in a partial loss of engine power shortly after takeoff.
- [NTSB WPR21FA272](https://openairdocs.org/ntsb/WPR21FA272.md): Mooney M20J · Dinsmore, CA · Accident · 4 fatal · Class 3 · Field · Final report · Jul 15, 2021 · N4474H · Destroyed
  > The airplane’s degraded engine performance due to wear to the intake cam lobes, which diminished the airplane’s takeoff and climb performance, resulting in a subsequent collision with trees.
- [NTSB ERA20LA287](https://openairdocs.org/ntsb/ERA20LA287.md): Piper PA34 · Groton, CT · Accident · Minor injuries · Class 3 · Limited · Final report · Aug 18, 2020 · N41382 · Substantial damage
  > The reported partial loss of right engine power for reasons that could not be determined based on available evidence.
- [NTSB CEN20LA292](https://openairdocs.org/ntsb/CEN20LA292.md): Beech A23-24 · Burns Flat, OK · Accident · No injuries · Class 3 · Limited · Final report · Jul 19, 2020 · N3412C · Substantial damage
  > The mechanic’s improper maintenance when he reinstalled the fuel servo during the last annual inspection, which resulted in a loss of engine power during cruise flight when the throttle control rod-end disconnected from the fuel servo throttle linkage.
- [NTSB ERA20LA213](https://openairdocs.org/ntsb/ERA20LA213.md): Vans RV8 · Hampton, GA · Accident · Serious injuries · Class 3 · Limited · Final report · Jun 12, 2020 · N553KM · Substantial damage
  > The pilot’s excessive maneuvering at low altitude following a partial loss of engine power which resulted in an aerodynamic stall and collision with terrain.
- [NTSB CEN20LA051](https://openairdocs.org/ntsb/CEN20LA051.md): Enstrom F28 · Danbury, TX · Accident · No injuries · Class 3 · Limited · Final report · Dec 31, 2019 · N57SJ · Substantial damage
  > The failure of the engine's No.3 intake valve resulting is a loss of engine power and a rollover following the autorotation to soft ground.
- [NTSB WPR19LA136](https://openairdocs.org/ntsb/WPR19LA136.md): Piper PA28R · Winter Haven, FL · Accident · No injuries · Class 3 · Limited · Final report · May 4, 2019 · N2134T · Substantial damage
  > A partial loss of engine power due to worn fuel valve O-rings, which allowed air into the fuel system and resulted in a forced landing to unsuitable terrain.
- [NTSB WPR18LA250](https://openairdocs.org/ntsb/WPR18LA250.md): Stoddard Hamilton Glasair Super IIS · Yuma, AZ · Accident · No injuries · Limited investigation · Final report · Aug 27, 2018 · N8162H · Substantial damage
  > A total loss of engine power as a result of the detachment of the throttle linkage from the throttle arm of the fuel injector servo due to an insufficiently tightened and secured bolt and the subsequent inadequate maintenance inspection.
- [NTSB ERA18FA137](https://openairdocs.org/ntsb/ERA18FA137.md): Piper PA28R · Gainesville, GA · Accident · 1 fatal · Field investigation · Final report · Apr 28, 2018 · N4363F · Substantial damage
  > A partial loss of engine power due to inadequate thru-bolt and stud preload tension by undetermined maintenance personnel, which resulted in fretting between the engine crankcase halves, and the subsequent separation of the No. 2 cylinder due to the fatigue…
- [NTSB ERA17LA110](https://openairdocs.org/ntsb/ERA17LA110.md): Piper PA28R · Bayonne, NJ · Accident · Serious injuries · Limited investigation · Final report · Feb 19, 2017 · N15745 · Substantial damage
  > Maintenance personnel’s incorrect installation of the No. 3 cylinder’s hydraulic valve tappet plunger, which resulted in a failure of the No. 3 cylinder’s intake valve and the subsequent partial loss of engine power.
- [NTSB WPR17LA004](https://openairdocs.org/ntsb/WPR17LA004.md): Rockwell International 112A · Phoenix, AZ · Accident · Serious injuries · Class 3 · Limited · Final report · Oct 12, 2016 · N509CA · Substantial damage
  > A catastrophic engine failure due to lack of lubrication due to the absence of 2 piston cooling nozzles that backed out of their respective threaded bores, which resulted in a forced landing on unsuitable terrain.
- [NTSB ERA16LA280](https://openairdocs.org/ntsb/ERA16LA280.md): Piper PA 28R-201 · Northampton, MA · Accident · No injuries · Limited investigation · Final report · Aug 6, 2016 · N3783M · Substantial damage
  > The failure of the alternate air valve plate hinge pin, which caused the alternate air valve plate to lodge in the fuel servo assembly, which resulted in a restriction of air to the fuel servo assembly, a loss of engine power, and an off-airport emergency…
- [NTSB WPR16LA039](https://openairdocs.org/ntsb/WPR16LA039.md): Mooney M20E · Corona, CA · Accident · No injuries · Limited investigation · Final report · Dec 14, 2015 · N5863Q · Substantial damage
  > A partial loss of engine power during initial climb for reasons that could not be determined based on available information. Contributing to the accident was the pilot’s decision to conduct the takeoff with observed engine deficiencies.
- [NTSB ERA16LA046](https://openairdocs.org/ntsb/ERA16LA046.md): Mooney M20 · Fort Meade, MD · Accident · No injuries · Limited investigation · Final report · Nov 22, 2015 · N5512Q · Substantial damage
  > A partial loss of engine power for reasons that could not be determined because postaccident examination of the engine revealed no mechanical malfunctions or failures that would have precluded normal operation.
- [NTSB CEN15LA038](https://openairdocs.org/ntsb/CEN15LA038.md): Stol UC 1 · Jacksonville, TX · Accident · Minor injuries · Limited investigation · Final report · Oct 25, 2014 · N950TB · Substantial damage
  > The loss of right engine power while climbing due to fuel starvation for reasons that could not be determined during postaccident airplane examination and testing, which led to a forced landing on hilly terrain.
- [NTSB ERA15FA016](https://openairdocs.org/ntsb/ERA15FA016.md): Rockwell International 112 · Gainesville, GA · Accident · 2 fatal · Field investigation · Final report · Oct 16, 2014 · N1148J · Destroyed
  > The partial loss of engine power due to the undetected blockage of the inlet and outlet ports of the manifold valve by an organic compound of an unknown source.
- [NTSB CEN14LA333](https://openairdocs.org/ntsb/CEN14LA333.md): Cessna 172R · Joplin, MO · Accident · No injuries · Limited investigation · Final report · Jul 1, 2014 · N468CM · Substantial damage
  > The partial loss of engine power for reasons that could not be determined because an operational test run of the engine did not reveal any anomalies that would have precluded normal operation.
- [NTSB ERA13LA342](https://openairdocs.org/ntsb/ERA13LA342.md): Mooney M20J · Leonardtown, MD · Accident · Minor injuries · Limited investigation · Final report · Jul 29, 2013 · N4570H · Substantial damage
  > The improper installation and inspection of the throttle linkage by maintenance personnel, which resulted in the throttle linkage coming loose and a subsequent partial loss of engine power.
- [NTSB CEN13LA095](https://openairdocs.org/ntsb/CEN13LA095.md): Mooney M20E · Gurdon, AR · Accident · No injuries · Limited investigation · Final report · Dec 5, 2012 · N9493V · Substantial damage
  > The total loss of engine power for reasons that could not be determined because no mechanical engine malfunctions were identified and because the actual fuel load and distribution at the time of the accident could not be determined.
- [NTSB CEN12FA463](https://openairdocs.org/ntsb/CEN12FA463.md): Mooney M20E · Marked Tree, AR · Accident · Minor injuries · Field investigation · Final report · Jul 21, 2012 · N1310W · Substantial damage
  > The loss of engine power during cruise flight due to a malfunction of the fuel injection servo due to a damaged O-ring.
- [NTSB CEN12LA368](https://openairdocs.org/ntsb/CEN12LA368.md): Mooney M20F · Hooker, OK · Accident · Serious injuries · Limited investigation · Final report · Jun 12, 2012 · N6455Q · Substantial damage
  > The pilot’s loss of airplane control after a partial loss of engine power for reasons that could not be determined because postaccident examination of the airframe and engine revealed no evidence of mechanical malfunctions or failures, which resulted in an…
- [NTSB ERA12LA267](https://openairdocs.org/ntsb/ERA12LA267.md): Piper PA-28R-200 · Eastover, SC · Accident · No injuries · Limited investigation · Final report · Apr 3, 2012 · N961JD · Substantial damage
  > Inadequate or loss of through bolt preload tension, which resulted in fretting between the engine halves, the subsequent failure of one cylinder through bolt, the loosening of additional cylinder retaining studs, and the fracture of the crankcase.…
- [NTSB ERA11CA243](https://openairdocs.org/ntsb/ERA11CA243.md): Piper PA-28-180 · Latrobe, PA · Accident · No injuries · Data collection · Final report · Apr 14, 2011 · N5325L · Substantial damage
  > Maintenance personnel’s failure to properly secure the throttle cable to the fuel servo.
- [NTSB WPR11LA160](https://openairdocs.org/ntsb/WPR11LA160.md): Piper PA-28R-200 · Agoura Hills, CA · Accident · No injuries · Limited investigation · Final report · Mar 11, 2011 · N75224 · Substantial damage
  > The loss of engine power during cruise flight for undetermined reasons.
- [NTSB WPR11FA114](https://openairdocs.org/ntsb/WPR11FA114.md): Mooney M20J · Furnace Creek, CA · Accident · 1 fatal · Field investigation · Final report · Jan 29, 2011 · N50BJ · Substantial damage
  > The magneto clamps were not securely fastened to the mount, which led to a partial loss of engine power and a subsequent forced landing on unsuitable terrain.
- [NTSB WPR10LA456](https://openairdocs.org/ntsb/WPR10LA456.md): Savage Savage-Cozy · Aurora, OR · Accident · Serious injuries · Limited investigation · Final report · Sep 12, 2010 · N9699 · Substantial damage
  > The pilot’s failure to maintain control of the airplane following a loss of engine power in the traffic pattern; the cause of the loss of engine power for reasons that could not be determined because postaccident examination of the airframe and engine did not…
- [NTSB CEN10LA432](https://openairdocs.org/ntsb/CEN10LA432.md): Beech A24R · Muskegon, MI · Accident · Serious injuries · Limited investigation · Final report · Jul 25, 2010 · N24584 · Substantial damage
  > A loss of engine power for undetermined reasons.
- [NTSB ERA09LA143](https://openairdocs.org/ntsb/ERA09LA143.md): Aero Commander 112A · Everglades City, FL · Accident · Minor injuries · Limited investigation · Final report · Jan 25, 2009 · N1006J · Substantial damage
  > The partial loss of engine power for an undetermined reason. Contributing to the accident was the pilot's attempt to continue takeoff with partial engine power.

## 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 ('41515')
    AND EXISTS (SELECT 1 FROM 'https://openairdocs.org/data/latest/ntsb_events.parquet' e WHERE e.case_mkey = x.case_mkey AND e.aircrafts_position = x.position AND e."isDefiningEvent" AND e."tier2Number" = '342'))
ORDER BY c."eventDate" DESC, c."ntsbNumber" DESC
```

This list as a web page: https://openairdocs.org/ntsb-events/342/cases?engine=41515

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