# NTSB investigations: Lycoming T-53 series: Loss of control - in flight

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 SEA07LA154](https://openairdocs.org/ntsb/SEA07LA154.md): Bell UH-1B · Biggs, CA · Accident · No injuries · Limited investigation · Final report · Jun 12, 2007 · N2087S · Substantial damage
  > Loss of control during hover for undetermined reasons.
- [NTSB LAX06LA134](https://openairdocs.org/ntsb/LAX06LA134.md): Bell UH-1H · Yuba City, CA · Accident · No injuries · Limited investigation · Final report · Apr 1, 2006 · N710WD · Substantial damage
  > The pilot's in-flight loss of control of the helicopter for undetermined reasons. A factor was the trees.
- [NTSB FTW98LA405](https://openairdocs.org/ntsb/FTW98LA405.md): Bell UH-1L · Price, UT · Accident · Minor injuries · Limited investigation · Final report · Sep 19, 1998 · N5107J · Substantial damage
  > The pilot's inadvertent loss of tail rotor effectiveness. Factors were the high density altitude flight conditions, the unfavorable wind condition, and the none suitable terrain for an autorotation.
- [NTSB ATL94LA035](https://openairdocs.org/ntsb/ATL94LA035.md): Kaman HH-43B/F · Mobile, AL · Accident · No injuries · Limited investigation · Final report · Dec 29, 1993 · N5197W · Substantial damage
  > An inadequate major repair by company maintenance personnel who failed to install the cotter pin which secured the retaining nut of the right main rotor hub teeter pin.
- [NTSB ANC91LA058](https://openairdocs.org/ntsb/ANC91LA058.md): Bell UH-1B · Dog Fish Bay, AK · Accident · 1 fatal · Limited investigation · Final report · May 21, 1991 · N87966 · Destroyed
  > The pilot's exceeding the gross weight of the aircraft and inadequate supervision by company management. Contributing to the accident was the high vegetation.
- [NTSB LAX82DA264](https://openairdocs.org/ntsb/LAX82DA264.md): Bell 204 · Delano, CA · Accident · No injuries · Final report · Jul 18, 1982 · N910PD · Destroyed
  > The acft was spraying for mediterranean fruit flies with another acft. Entering a "scissors" or opposite direction pattern with the second helicopter spraying in the opposite direction, the plt had to slow down in order to begin his swath at the completion of…

## 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 ('41552', '41549', '41587')
    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" = 250))
ORDER BY c."eventDate" DESC, c."ntsbNumber" DESC
```

This list as a web page: https://openairdocs.org/ntsb?engine=41552&occurrence=250

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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.