# Fatal NTSB investigations: Lycoming T53-L-13

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 CEN23FA340](https://openairdocs.org/ntsb/CEN23FA340.md): Richards Heavylift Helo UH-1H · Oakdale, IL · Accident · 1 fatal · Class 3 · Field · Final report · Jul 31, 2023 · N567VF · Substantial damage
  > An in-flight loss of control for undetermined reasons.
- [NTSB WPR22FA098](https://openairdocs.org/ntsb/WPR22FA098.md): Bell UH-1H · Coalinga, CA · Accident · 1 fatal · Class 3 · Field · Final report · Feb 17, 2022 · N72297 · Substantial damage
  > The pilot’s loss of situational awareness for reasons that could not be determined given the available evidence, which led to controlled flight into terrain. Contributing to the accident was the pilot’s decision to operate the helicopter while ill and…
- [NTSB WPR13FA417](https://openairdocs.org/ntsb/WPR13FA417.md): Bell UH-1V · Cordes Lakes, AZ · Accident · 2 fatal · Field investigation · Final report · Sep 21, 2013 · N22490 · Destroyed
  > The pilot's improper maintenance on the helicopter’s main rotor blade pitch control system, which resulted in an in-flight loss of main rotor blade pitch control, mast bumping, and mast failure.
- [NTSB CEN13FA415](https://openairdocs.org/ntsb/CEN13FA415.md): Bell UH-1H · Dove Creek, CO · Accident · 1 fatal · Field investigation · Final report · Jul 16, 2013 · N775AR · Substantial damage
  > Pilot-induced oscillations caused by the loss of hydraulic assist of the flight controls due to an excessive loss of hydraulic fluid during a critical phase of flight, which resulted in ground impact. Contributing to the accident was an inadequate analysis of…
- [NTSB DFW05WA254](https://openairdocs.org/ntsb/DFW05WA254.md): Bell UH-1H · Pisa Flores, Mexico · Accident · 1 fatal · Foreign investigation · Sep 26, 2005 · N3140U · Destroyed
- [NTSB LAX03LA160](https://openairdocs.org/ntsb/LAX03LA160.md): Bell UH-1H · Kahoolawe, HI · Accident · 1 fatal · Limited investigation · Final report · May 22, 2003 · N3280U · Destroyed
  > The pilot's failure to remove the external load cable before the repositioning flight, which resulted in the cable striking the tail rotor in cruise flight.
- [NTSB SEA02FA108](https://openairdocs.org/ntsb/SEA02FA108.md): Garlick UH-1H · Clark Fork, ID · Accident · 1 fatal · Field investigation · Final report · Jun 21, 2002 · N114DR · Substantial damage
  > A failure of unknown origin in the tail rotor drive assembly. Factors include mountainous terrain unsuitable for an emergency landing.
- [NTSB SEA97LA025](https://openairdocs.org/ntsb/SEA97LA025.md): Garlick TH-1L · Leavenworth, WA · Accident · 1 fatal · Limited investigation · Final report · Nov 5, 1996 · N465JR · Destroyed
  > Fatigue failure of the vertical stabilizer spar cap and subsequent loss of the rotorcraft's vertical stabilizer. Factors include inadequate inspection or trouble-shooting of the aircraft tail cone and vertical stabilizer at and after the time sheet-metal…

## 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."highestInjuryLevel" = 'Fatal'
  AND c."mKey" IN (SELECT x.case_mkey FROM 'https://openairdocs.org/data/latest/ntsb_aircrafts.parquet' x WHERE x.engine_model_code IN ('41551'))
ORDER BY c."eventDate" DESC, c."ntsbNumber" DESC
```

This list as a web page: https://openairdocs.org/ntsb?engine=41551&fatal=1

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OpenAirDocs.org is an independent research project of [Contrail Labs](https://contraillabs.com/). It is not affiliated with the FAA or the NTSB. Source documents are U.S. government works in the public domain.