# NTSB investigations, MD: 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 ERA22LA117](https://openairdocs.org/ntsb/ERA22LA117.md): Hughes 369D · Bel Air, MD · Accident · No injuries · Class 3 · Limited · Final report · Feb 9, 2022 · N9159F · Substantial damage
  > A loss of engine power due to bearing failures in the turbine section resulting from a fatigue fracture of the oil supply line that fed oil to the Nos. 6 and 7 bearings. The oil line failure led to rapid deterioration of the bearings from oil starvation.…
- [NTSB ERA20LA341](https://openairdocs.org/ntsb/ERA20LA341.md): Tecnam P92 · Centerville, MD · Accident · No injuries · Class 3 · Limited · Final report · Sep 28, 2020 · N562TU · Substantial damage
  > The fatigue failure of the No. 1 cylinder exhaust valve spring retainer due to air trapped in the lubrication system, which resulted in a total loss of engine power.
- [NTSB ERA19LA274](https://openairdocs.org/ntsb/ERA19LA274.md): Socata TB9 · Fort Meade, MD · Accident · Minor injuries · Class 3 · Limited · Final report · Sep 17, 2019 · N2824R · Substantial damage
  > The failure of the carburetor intake scat tubing, which resulted in a partial loss of engine power.
- [NTSB ERA19LA232](https://openairdocs.org/ntsb/ERA19LA232.md): Vans RV7 · Ocean City, MD · Accident · Minor injuries · Class 3 · Limited · Final report · Jul 19, 2019 · N849GS · Substantial damage
  > The disconnection of the propeller governor control arm from the propeller governor due to a missing attachment bolt, which resulted in a partial loss of engine power during takeoff when the governor control vibrated to a high pitch, low rpm setting.
- [NTSB ANC19LA034](https://openairdocs.org/ntsb/ANC19LA034.md): Cessna 172RG · Ocean City, MD · Accident · No injuries · Class 3 · Limited · Final report · Jul 16, 2019 · N9715B · Substantial damage
  > A partial loss of power due to the liberation or failure of the No. 2 cylinder's exhaust valve.
- [NTSB ERA17LA246](https://openairdocs.org/ntsb/ERA17LA246.md): Costruzioni Aeronautiche Tecna P92 Eaglet · Stevensville, MD · Accident · No injuries · Class 3 · Limited · Final report · Jul 15, 2017 · N561TU · Substantial damage
  > The fatigue failure of an exhaust valve spring retainer due to air trapped in the lubrication system, which resulted in a total loss of engine power.
- [NTSB ERA16LA319](https://openairdocs.org/ntsb/ERA16LA319.md): Grumman G164 · Chestertown, MD · Accident · Minor injuries · Class 3 · Limited · Final report · Sep 18, 2016 · N75EP · Substantial damage
  > Loss of engine power due to a failure of the No. 3 cylinder head, which resulted in a forced landing and collision with ground equipment.
- [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 ERA15LA368](https://openairdocs.org/ntsb/ERA15LA368.md): Cessna 150M · Mount Airy, MD · Accident · No injuries · Limited investigation · Final report · Sep 19, 2015 · N714CW · Substantial damage
  > The in-flight fatigue failure of the No. 4 cylinder barrel, which resulted in a total loss of engine power.
- [NTSB ERA15LA179](https://openairdocs.org/ntsb/ERA15LA179.md): Bell 206B · Taylors Island, MD · Accident · No injuries · Limited investigation · Final report · Mar 24, 2015 · N43CM · Substantial damage
  > A partial loss of engine power during cruise flight for reasons that could not be determined because postaccident examination of the airframe and engine did not reveal any anomalies that would have precluded normal operation.
- [NTSB ERA15LA123](https://openairdocs.org/ntsb/ERA15LA123.md): American AA-1 · Fort Meade, MD · Accident · Serious injuries · Limited investigation · Final report · Feb 8, 2015 · N6116L · Substantial damage
  > The mechanic’s failure to detect the incorrect dry valve tappet clearances while troubleshooting ongoing engine issues, which resulted in partial loss of engine power during takeoff. Contributing to the partial loss of engine power was the mechanic's failure…
- [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 ERA09LA187](https://openairdocs.org/ntsb/ERA09LA187.md): Doyle-Michael Sonerai-II · Leonardtown, MD · Accident · Minor injuries · Limited investigation · Final report · Mar 6, 2009 · N28MD · Substantial damage
  > The pilot's continued operation of the airplane with a known mechanical deficiency. Contributing to the accident was the improper installation of the electronic ignition system.

## 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" = 'MD' 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=MD

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