# NTSB investigations, TN: Electrical system malf/failure

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 ANC19LA036](https://openairdocs.org/ntsb/ANC19LA036.md): Stoddard Hamilton Glasair II · Chattanooga, TN · Accident · Serious injuries · Class 3 · Limited · Final report · Jul 17, 2019 · C-GAFT · Substantial damage
  > The pilot's failure to switch to the secondary electrical system after the primary electrical system failed for unknown reasons.
- [NTSB ERA19LA177](https://openairdocs.org/ntsb/ERA19LA177.md): Zenith CH750 · Savannah, TN · Accident · No injuries · Class 3 · Limited · Final report · May 16, 2019 · N750GZ · Substantial damage
  > The total loss of engine power due to a loss of all electrical power. Contributing to the accident was the inaccessible placement of the alternator circuit breaker and the construction of the airplane without a backup electrical source.
- [NTSB ERA15LA333](https://openairdocs.org/ntsb/ERA15LA333.md): Beech E 90 · Fayetteville, TN · Accident · No injuries · Limited investigation · Final report · Aug 28, 2015 · N891PC · Substantial damage
  > A total loss of electrical power for reasons that could not be determined and the pilot's subsequent failure to properly follow the manual landing gear extension procedures, which resulted in the landing gear not extending.
- [NTSB ERA14LA311](https://openairdocs.org/ntsb/ERA14LA311.md): Robinson Helicopter R44 II · Nashville, TN · Accident · No injuries · Limited investigation · Final report · Jun 24, 2014 · N544BS · Substantial damage
  > The pilot’s failure to maintain rotor rpm during an autorotation after a perceived partial loss of power, which resulted in a hard landing. Contributing to the accident was radio frequency interference with the governor controller, which resulted in an…

## 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" = 'TN' 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" = '332' 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/332/sequence?state=TN

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