# NTSB investigations: Weatherly 620B: Loss of engine power

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 CHI05LA213](https://openairdocs.org/ntsb/CHI05LA213.md): Weatherly 620-B · Osage, IA · Accident · Serious injuries · Limited investigation · Final report · Aug 6, 2005 · N6305W · Destroyed
  > The partial loss of engine power for an undetermined reason. Contributing factors were the wires and the trees.
- [NTSB CHI05LA104](https://openairdocs.org/ntsb/CHI05LA104.md): Weatherly 620B · Downs, KS · Accident · Minor injuries · Limited investigation · Final report · Apr 20, 2005 · N9026F · Substantial damage
  > The loss of engine power due to the failure of the number two cylinder which was the result of the maintenance facility's failure to detect the fatigue crack in the number two cylinder during the engine overhaul. A factor to the accident was the soft field.
- [NTSB SEA99LA089](https://openairdocs.org/ntsb/SEA99LA089.md): Weatherly 620B · Tetonia, ID · Accident · Minor injuries · Limited investigation · Final report · Jun 21, 1999 · N2033N · Substantial damage
  > A failure of the right magneto drive gear shaft. Factors include the absence of any suitable terrain on which to perform an emergency landing, and the rough/uneven condition of the terrain on which the pilot was forced to land.
- [NTSB SEA97LA074](https://openairdocs.org/ntsb/SEA97LA074.md): Weatherly 620B · Wasco, OR · Accident · Minor injuries · Limited investigation · Final report · Mar 22, 1997 · N20113 · Substantial damage
  > the partial loss of engine power for undetermined reasons and the pilot's selection of unsuitable terrain for a precautionary landing. A factor was the rough terrain.

## 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.aircraft_model_code IN ('9630605', '9630607')
    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" = 350))
ORDER BY c."eventDate" DESC, c."ntsbNumber" DESC
```

This list as a web page: https://openairdocs.org/ntsb?model=9630605&occurrence=350

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