# NTSB investigations: Lycoming IO-540 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 ERA26LA296](https://openairdocs.org/ntsb/ERA26LA296.md): Piper PA32 · Dawsonville, GA · Accident · Serious injuries · Class 3 · Limited · Investigation open · Aug 9, 2026 · N3011X
- [NTSB ANC26LA029](https://openairdocs.org/ntsb/ANC26LA029.md): Maule M-7-235 · Wasilla, AK · Accident · No injuries · Class 3 · Limited · Preliminary report · Apr 3, 2026 · N93ML · Substantial damage
  > On April 3, 2026, at 1300 Alaska daylight time, a Maule M 7 235 airplane, N93ML, was substantially damaged during an accident near Wasilla, Alaska. The pilot and one passenger were not injured. The airplane was operated as a personal flight under the…
- [NTSB WPR26LA020](https://openairdocs.org/ntsb/WPR26LA020.md): Piper PA-23-250 · Condon, MT · Accident · 3 fatal · Class 3 · Limited · Preliminary report · Oct 17, 2025 · N2345R · Substantial damage
  > On October 17, 2025, about 1615 mountain daylight time, a Piper PA-23-250, N2345R, was substantially damaged when it was involved in an accident near Condon, Montana. The pilot and two passengers were fatally injured. The airplane was operated as a Title 14…
- [NTSB CEN22LA429](https://openairdocs.org/ntsb/CEN22LA429.md): Commander 114TC · Savoy, TX · Accident · No injuries · Class 3 · Limited · Final report · Sep 22, 2022 · N495TC · Substantial damage
  > A loss of engine power for reasons that could not be determined.
- [NTSB CEN21LA273](https://openairdocs.org/ntsb/CEN21LA273.md): Tony Dubeansky RV10 · Fort Worth, TX · Accident · No injuries · Class 3 · Limited · Final report · Jun 16, 2021 · N878TD · Substantial damage
  > A partial loss of engine power due to a separated electronic ignition system connector. Contributing to the accident was the location of the ignition boxes, which provided limited access to the connectors for visual inspection.
- [NTSB CEN18LA382](https://openairdocs.org/ntsb/CEN18LA382.md): Cessna 206 · Sugar Land, TX · Accident · Minor injuries · Limited investigation · Final report · Sep 19, 2018 · N247F · Substantial damage
  > Fatigue failure of the No. 1 cylinder intake valve, which resulted in the loss of engine power.
- [NTSB WPR17LA188](https://openairdocs.org/ntsb/WPR17LA188.md): Robinson Helicopter R44 II · El Dorado Hills, CA · Accident · Minor injuries · Limited investigation · Final report · Aug 26, 2017 · N61NM · Substantial damage
  > Maintenance personnel's inadequate routine maintenance on the helicopter engine, which led to low cylinder compression, improper magneto timing, and camshaft lobe wear, which subsequently resulted in degraded engine performance.
- [NTSB CEN17LA271](https://openairdocs.org/ntsb/CEN17LA271.md): Piper PA 32-300 · Rushville, IN · Accident · No injuries · Limited investigation · Final report · Jul 5, 2017 · N112DE · Substantial damage
  > The pilot’s inability to properly control engine power because of an improperly installed throttle control arm, which resulted in a partial loss of engine power and led to a forced landing.
- [NTSB ERA17LA169](https://openairdocs.org/ntsb/ERA17LA169.md): Piper PA32RT · Coral Springs, FL · Accident · No injuries · Limited investigation · Final report · Apr 30, 2017 · N31678 · Substantial damage
  > The in-flight disconnection of the fuel injection servo throttle linkage, which resulted in a loss of engine power.
- [NTSB ERA17LA019](https://openairdocs.org/ntsb/ERA17LA019.md): Cessna 182 · Toone, TN · Accident · No injuries · Limited investigation · Final report · Oct 9, 2016 · N65903 · Substantial damage
  > A stuck No. 3 cylinder exhaust valve, which resulted in failure of the cylinder's valvetrain components, breach of the cylinder's rocker box cover, and partial loss of engine power due to oil starvation.
- [NTSB CEN15LA170](https://openairdocs.org/ntsb/CEN15LA170.md): Maule M 7-260C · Oregon, MO · Accident · No injuries · Limited investigation · Final report · Mar 10, 2015 · N55000 · Substantial damage
  > Engine vibration for reasons that could not be determined based on the available evidence.
- [NTSB CEN13LA201](https://openairdocs.org/ntsb/CEN13LA201.md): Piper PA23-250 · Winsted, MN · Accident · No injuries · Limited investigation · Final report · Mar 16, 2013 · N6222M · Substantial damage
  > The obstruction of the right engine’s induction air system by ice, which resulted in a loss of engine power.
- [NTSB CEN13FA182](https://openairdocs.org/ntsb/CEN13FA182.md): Aero Commander 500B · Broomfield, CO · Accident · Minor injuries · Field investigation · Final report · Mar 1, 2013 · N93AA · Substantial damage
  > Loss of engine power due to fuel exhaustion. Contributing to the accident was the failure of the fuel gauge to indicate the actual amount of fuel on board the airplane and the design of the airplane's fuel system, which precluded a visual confirmation of the…
- [NTSB ANC11CA075](https://openairdocs.org/ntsb/ANC11CA075.md): Piper PA-32-301 · Kodiak, AK · Accident · No injuries · Data collection · Final report · Aug 12, 2011 · N8152Z · Substantial damage
  > A partial loss of engine power while on approach to land due to a disconnected throttle control linkage, and the maintenance director's inadequate inspection of the throttle linkage during maintenance.
- [NTSB WPR10LA420](https://openairdocs.org/ntsb/WPR10LA420.md): Robinson R44 · San Diego, CA · Accident · Serious injuries · Limited investigation · Final report · Aug 23, 2010 · N7186Z · Substantial damage
  > The pilot's failure to utilize carburetor heat during initial climb, which resulted in a loss of engine power due to carburetor icing.
- [NTSB CEN10LA496](https://openairdocs.org/ntsb/CEN10LA496.md): Cessna 182T · Mosby, MT · Accident · No injuries · Limited investigation · Final report · Aug 18, 2010 · N1142U · Substantial damage
  > A partial loss of engine power for undetermined reasons during an en route climb.
- [NTSB CHI08LA180](https://openairdocs.org/ntsb/CHI08LA180.md): Smith Aerostar 601P · Alexandria, MN · Accident · Minor injuries · Limited investigation · Final report · Jul 2, 2008 · N601TS · Substantial damage
  > The loss of engine power for undetermined reasons. Contributing to the accident was the unsuitable terrain for the forced landing.

## 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 ('41530', '41585')
    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=41530

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