# NTSB investigations, MA: 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 ERA20FA031](https://openairdocs.org/ntsb/ERA20FA031.md): Cessna 150 · New Bedford, MA · Accident · 1 fatal · Class 3 · Field · Final report · Nov 4, 2019 · N714LK · Destroyed
  > Pilot impairment due to exposure to carbon monoxide as a result of undetected corrosion and holes in the engine’s left exhaust muffler.
- [NTSB ERA16LA216](https://openairdocs.org/ntsb/ERA16LA216.md): Robinson Helicopter R44 · Chatham, MA · Accident · Serious injuries · Limited investigation · Final report · Jun 17, 2016 · N141TM · Substantial damage
  > The inadequate maintenance of the lower forward clutch actuator bearing for a prolonged period of time, which resulted in a bearing failure. Contributing to the accident was an erroneous maintenance entry, which resulted in the helicopter being operated…
- [NTSB ERA11LA383](https://openairdocs.org/ntsb/ERA11LA383.md): Cessna 150L · Plymouth, MA · Accident · No injuries · Limited investigation · Final report · Jul 4, 2011 · N150ET · Substantial damage
  > A partial loss of engine power during initial climb due to a stuck cylinder valve, which resulted from excessive corrosion and carbon deposits on the valve springs due to inadequate maintenance.
- [NTSB ERA10LA362](https://openairdocs.org/ntsb/ERA10LA362.md): Garlick Helicopters OH-58A+ · Rowley, MA · Accident · No injuries · Limited investigation · Final report · Jul 15, 2010 · N802JB · Substantial damage
  > The failure of the power turbine governor internal driveshaft bearings, resulting in the failure of the governor.
- [NTSB ERA09LA399](https://openairdocs.org/ntsb/ERA09LA399.md): Cessna 172N · Rochester, MA · Accident · No injuries · Limited investigation · Final report · Jul 12, 2009 · N4773G · Substantial damage
  > An engine vibration as reported by the pilot, for undetermined reasons.

## 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" = 'MA' AND c."eventCountry" = 'USA'
  AND c."mKey" IN (SELECT e.case_mkey FROM 'https://openairdocs.org/data/latest/ntsb_events.parquet' e WHERE e."isDefiningEvent" AND e."tier2Number" = '340')
ORDER BY c."eventDate" DESC, c."ntsbNumber" DESC
```

This list as a web page: https://openairdocs.org/ntsb-events/340/cases?state=MA

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