# NTSB investigations: Lycoming T53L-703

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 CEN23LA295](https://openairdocs.org/ntsb/CEN23LA295.md): Bell UH-1H · Woodlawn, IL · Accident · No injuries · Class 3 · Limited · Final report · Jul 11, 2023 · N900VF · Substantial damage
  > The separation of the tail boom from the fuselage for reasons that could not be determined.
- [NTSB WPR20LA280](https://openairdocs.org/ntsb/WPR20LA280.md): Arrow-Falcon Exporters UH-1H · Coalinga, CA · Accident · 1 fatal · Class 3 · Limited · Final report · Aug 19, 2020 · N711GH · Destroyed
  > The pilot’s inability to maintain control of the helicopter due to a hydraulic system failure for reasons that could not be fully determined due to the thermal destruction from the postimpact fire.
- [NTSB CEN18FA078](https://openairdocs.org/ntsb/CEN18FA078.md): Bell UH-1H · Raton, NM · Accident · 5 fatal · Field investigation · Final report · Jan 18, 2018 · N658H · Destroyed
  > The pilot's failure to maintain adequate altitude above mountainous terrain during cruise flight in dark night conditions, which resulted in controlled flight into terrain.
- [NTSB WPR12LA279](https://openairdocs.org/ntsb/WPR12LA279.md): Bell UH-1F · Concrete, WA · Accident · Serious injuries · Limited investigation · Final report · Jun 26, 2012 · N4582D · No damage
  > Arcing of an energized electrical power line to the external long line and the conduct of electrical energy to ground personnel.
- [NTSB WPR12LA107](https://openairdocs.org/ntsb/WPR12LA107.md): Bell AH-1F · Coolidge, AZ · Accident · Minor injuries · Limited investigation · Final report · Mar 1, 2012 · N197LE · Substantial damage
  > A flight control malfunction while maneuvering for reasons that could not be determined because postaccident examination revealed no evidence of a mechanical malfunction or failure that would have precluded normal operation.
- [NTSB SEA01TA172](https://openairdocs.org/ntsb/SEA01TA172.md): Bell 205 · Troy, MT · Accident · No injuries · Final report · Sep 17, 2001 · N458CC · Substantial damage
  > The pilot-in-command's failure to maintain seperation/clearance from trees while maneuvering.

## 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 ('41557'))
ORDER BY c."eventDate" DESC, c."ntsbNumber" DESC
```

This list as a web page: https://openairdocs.org/ntsb?engine=41557

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