# NTSB investigations, WI: Powerplant sys/comp malf/fail

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 CEN25LA053](https://openairdocs.org/ntsb/CEN25LA053.md): Piper PA-28R-200 · Boscobel, WI · Accident · No injuries · Class 3 · Limited · Final report · Dec 2, 2024 · N41997 · Substantial damage
  > The ice obstruction of the engine oil breather tube and alternate air outlet, which resulted in a failure of the crankcase oil seal and loss of engine oil. Contributing to the accident was the incorrect engine oil breather tube installed in the airplane by…
- [NTSB CEN24LA012](https://openairdocs.org/ntsb/CEN24LA012.md): Tvap 4 · Franksville, WI · Accident · No injuries · Class 3 · Limited · Final report · Oct 15, 2023 · N42VZ · Substantial damage
  > The improper installation of the supplemental ignition system, which resulted in a total loss of engine power.
- [NTSB CEN23LA250](https://openairdocs.org/ntsb/CEN23LA250.md): Champion 7EC · Waunakee, WI · Accident · Minor injuries · Class 3 · Limited · Final report · Jun 21, 2023 · N80461 · Substantial damage
  > A total loss of engine power during the initial takeoff climb due to a worn manual fuel primer pump locking mechanism, which resulted in an unlocked primer and an overly rich fuel mixture.
- [NTSB CEN22LA334](https://openairdocs.org/ntsb/CEN22LA334.md): Van's RV-10 · Beaver Dam, WI · Accident · Minor injuries · Class 3 · Limited · Final report · Jul 22, 2022 · N4400K · Substantial damage
  > The improperly secured spark plug boot that resulted in smoke in the cockpit and a subsequent off-airport landing.
- [NTSB CEN21LA222](https://openairdocs.org/ntsb/CEN21LA222.md): Flight Design Ctls · Racine, WI · Accident · Minor injuries · Class 3 · Limited · Final report · May 18, 2021 · N521CT · Destroyed
  > The fatigue failure of the carburetor throttle control cable, which resulted in a partial loss of engine control.
- [NTSB CEN21FA130](https://openairdocs.org/ntsb/CEN21FA130.md): Velocity Vtwin · Janesville, WI · Accident · 2 fatal · Class 3 · Field · Final report · Feb 16, 2021 · N13VT · Substantial damage
  > The exceedance of the maximum airspeed for flight with the landing gear extended, which resulted in a separation of the right main landing gear door that subsequently impacted the right propeller and resulted in a total loss of right engine power.…
- [NTSB CEN16LA302](https://openairdocs.org/ntsb/CEN16LA302.md): Sonex Waiex · Fond du Lac, WI · Accident · Serious injuries · Limited investigation · Final report · Aug 3, 2016 · N12YX · Substantial damage
  > A partial loss of engine for reasons that could not be determined during an examination of the engine.
- [NTSB CEN16LA309](https://openairdocs.org/ntsb/CEN16LA309.md): Cessna 172K · Neenah, WI · Accident · No injuries · Limited investigation · Final report · Aug 2, 2016 · N46459 · Substantial damage
  > A loss of engine power due to oil starvation, which resulted from the pilot, who was not a certified airframe and powerplant mechanic, removing the vacuum pump from the engine, and his misconception that he could operate the airplane without the pump.
- [NTSB CEN16LA294](https://openairdocs.org/ntsb/CEN16LA294.md): Bell 47G 2 · Oshkosh, WI · Accident · No injuries · Limited investigation · Final report · Jul 30, 2016 · N975BH · Substantial damage
  > The loosening and separation of the throttle linkage nut, which resulted in a loss of throttle control and subsequent hard landing after autorotation.
- [NTSB CEN16FA290](https://openairdocs.org/ntsb/CEN16FA290.md): Flight Design Ctls · Fond du Lac, WI · Accident · 1 fatal · Field investigation · Final report · Jul 28, 2016 · N527TS · Substantial damage
  > Carburetor contamination following exposure to water in the fuel, which resulted in a carburetor malfunction and a partial loss of engine power. Contributing to the accident was the pilot's loss of airplane control that resulted in a stall.
- [NTSB CEN16LA273](https://openairdocs.org/ntsb/CEN16LA273.md): Brandt Sonex · Lodi, WI · Accident · No injuries · Limited investigation · Final report · Jul 19, 2016 · N393SX · Substantial damage
  > The separated rocker arm assembly for undetermined reasons, which resulted in the partial loss of engine power and led to the landing gear collapsing during the subsequent forced landing.
- [NTSB GAA16CA322](https://openairdocs.org/ntsb/GAA16CA322.md): Marks Steven Challenger · Marion, WI · Accident · Serious injuries · Data collection · Final report · Jun 18, 2016 · N7058U · Substantial damage
  > The failure of the airplane engine drive belt during the takeoff, resulting in a forced landing and impact with terrain.
- [NTSB CEN16FA171](https://openairdocs.org/ntsb/CEN16FA171.md): Mcdonnell Douglas Helicopter 369E · Reedsville, WI · Accident · 1 fatal · Field investigation · Final report · May 4, 2016 · N629JK · Substantial damage
  > The failure of the power turbine governor's dual-spool bearing due to a lack of lubrication, which resulted in a complete loss of engine power and subsequent impact with terrain.
- [NTSB CEN12LA530](https://openairdocs.org/ntsb/CEN12LA530.md): Williams John T-51 Mustang · Oshkosh, WI · Accident · Serious injuries · Limited investigation · Final report · Aug 7, 2012 · N151TA · Substantial damage
  > The separation of an engine cooling hose from the radiator.
- [NTSB CEN12FA025](https://openairdocs.org/ntsb/CEN12FA025.md): Piper PA-28R-200 · Watertown, WI · Accident · No injuries · Field investigation · Final report · Oct 17, 2011 · N300KR · Substantial damage
  > The separation of the number 2 connecting rod from the crankshaft for reasons that could not be determined during postaccident metallurgical examination, which ultimately resulted in a total loss of engine power.
- [NTSB CEN11LA177](https://openairdocs.org/ntsb/CEN11LA177.md): Piper PA-16 · Lake Koshkonong, WI · Accident · Minor injuries · Limited investigation · Final report · Feb 5, 2011 · N5945H · Substantial damage
  > A loss of engine power for undetermined reasons during a low-altitude pass over a frozen lake.
- [NTSB CEN10LA123](https://openairdocs.org/ntsb/CEN10LA123.md): Cessna 172N · Genoa City, WI · Accident · Minor injuries · Limited investigation · Final report · Feb 14, 2010 · N24CV · Substantial damage
  > A total loss of engine power due to the failure of the bolts that held in place the connecting rods to the engine's No. 3 and No. 4 cylinders as a result of the engine overhaul facility's improper installation of the bolts during a recent overhaul.
- [NTSB CEN10IA059](https://openairdocs.org/ntsb/CEN10IA059.md): Piper PA-46-310P · Elk Mound, WI · Incident · No injuries · Incident investigation · Final report · Nov 13, 2009 · N667PC · Minor damage
  > The loss of engine power due to component failure from excessive heating of the engine connecting rod journals.
- [NTSB CEN09LA602](https://openairdocs.org/ntsb/CEN09LA602.md): Air Tractor AT-301A · New Miner, WI · Accident · Minor injuries · Limited investigation · Final report · Aug 22, 2009 · N3651R · Substantial damage
  > A total loss of engine power due to the fatigue failure of the engine torsion shaft. Contributing to the accident was the chrome plating of the shaft by an undetermined maintenance/overhaul facility.
- [NTSB CHI08LA230](https://openairdocs.org/ntsb/CHI08LA230.md): Cessna 172RG · Tomahawk, WI · Accident · Minor injuries · Limited investigation · Final report · Aug 2, 2008 · N6520R · Substantial damage
  > A total loss of engine power due to a loss of all of the engine's oil as a result of the safety wire on the governor idler gear shaft's oil plug breaking, leading to the oil plug coming unscrewed. Contributing to the accident was the lack of a suitable area…

## 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" = 'WI' 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" = '340' 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/340/sequence?state=WI

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