# NTSB investigations: Franklin 6A4150 series: Loss of engine power(partial) - mech failure/malf

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 LAX07LA040](https://openairdocs.org/ntsb/LAX07LA040.md): Stinson 108-1 · San Jose, CA · Accident · No injuries · Limited investigation · Final report · Nov 20, 2006 · N97949 · Substantial damage
  > Partial loss of engine power due to a seized exhaust valve during cruise flight. Rough terrain at the forced landing site was a contributing factor.
- [NTSB ATL05LA001](https://openairdocs.org/ntsb/ATL05LA001.md): Stinson 108 · Ashland, AL · Accident · Minor injuries · Limited investigation · Final report · Oct 2, 2004 · N40129 · Substantial damage
  > A total loss of engine power in cruise flight due to the fatigue failure of the No.4 cylinder exhaust valve.
- [NTSB LAX89LA298](https://openairdocs.org/ntsb/LAX89LA298.md): Stinson 108 · Cool, CA · Accident · No injuries · Limited investigation · Final report · Sep 1, 1989 · N97628 · Substantial damage
  > Failure of the #2 piston. Failure of the mechanic to properly overhaul the engine was a related factor.

## 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 ('27024')
    AND EXISTS (SELECT 1 FROM 'https://openairdocs.org/data/latest/ntsb_occurrences.parquet' o WHERE o.case_mkey = x.case_mkey AND o.aircrafts_position = x.position AND o."occurrenceNumber" = 1 AND o."occurrenceCode" = 352))
ORDER BY c."eventDate" DESC, c."ntsbNumber" DESC
```

This list as a web page: https://openairdocs.org/ntsb?engine=27024&occurrence=352

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