# NTSB investigations, 1991: Gear collapsed

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 NYC92LA015](https://openairdocs.org/ntsb/NYC92LA015.md): Cessna 150L · Sanford, ME · Accident · No injuries · Limited investigation · Final report · Oct 18, 1991 · N6544G · Substantial damage
  > The failure of the nose wheel through bolt as a result of fatigue cracking.
- [NTSB CHI91LA261](https://openairdocs.org/ntsb/CHI91LA261.md): Piper PA-32-R300 · Lake In Hills, IL · Accident · No injuries · Limited investigation · Final report · Aug 13, 1991 · N40446 · Substantial damage
  > The pilot's failure to perform an adequate preflight by assuring the gear lever was in the down and locked position.
- [NTSB CHI91LA262](https://openairdocs.org/ntsb/CHI91LA262.md): Cessna 310 · Plattsmouth, NE · Accident · No injuries · Limited investigation · Final report · Aug 10, 1991 · N4827B · Substantial damage
  > Improper maintenance by the owner/pilot. A factor related to the accident was the built-up of corrosion on he landing gear retraction system.
- [NTSB ANC91LA118](https://openairdocs.org/ntsb/ANC91LA118.md): Piper PA-31-350 · Emmonak, AK · Accident · No injuries · Limited investigation · Final report · Aug 8, 1991 · N27472 · Substantial damage
  > That the pilot inadvertently retracted the landing gear during the takeoff roll. Contributing to this accident was that the checklist was not followed.
- [NTSB CHI91LA201](https://openairdocs.org/ntsb/CHI91LA201.md): Piper PA-28-201R · Wheeling, IL · Accident · No injuries · Limited investigation · Final report · Jun 24, 1991 · N2126K · Substantial damage
  > The pilot in command's inadequate pre-flight inspection. Factors contributing to this accident were the landing gear lever not being engaged, the use of an inadequate procedure by the pilot-in-command, and the inadvertent gear retraction during takeoff roll.
- [NTSB DEN91LA054](https://openairdocs.org/ntsb/DEN91LA054.md): Beech H35 · Greeley, CO · Accident · No injuries · Limited investigation · Final report · Mar 24, 1991 · N5463D · Substantial damage
  > The pilot's inadvertent activation of the landing gear switch causing the landing gear to collapse while the aircraft was still on the landing roll.
- [NTSB LAX91LA142](https://openairdocs.org/ntsb/LAX91LA142.md): Cessna 421 · El Monte, CA · Accident · No injuries · Limited investigation · Final report · Mar 23, 1991 · N4071L · Substantial damage
  > The pilot retracting the landing gear during the landing roll.
- [NTSB CHI91LA105](https://openairdocs.org/ntsb/CHI91LA105.md): Cessna 401 · St. Louis, MO · Accident · No injuries · Limited investigation · Final report · Mar 6, 1991 · N401RW · Substantial damage
  > The landing gear locking mechanism (bell crank) had fractured.
- [NTSB SEA91TA003](https://openairdocs.org/ntsb/SEA91TA003.md): Piper PA-34 · Pinedale, WY · Accident · No injuries · Final report · Jan 25, 1991 · N8372Z · Substantial damage
  > The pilot's failure to attain proper runway alignment during landing. A contributing factor was a snow covered runway.

## 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 year(c."eventDate") = 1991
  AND c."mKey" IN (SELECT o.case_mkey FROM 'https://openairdocs.org/data/latest/ntsb_occurrences.parquet' o WHERE o."occurrenceNumber" = 1 AND o."occurrenceCode" = 190)
ORDER BY c."eventDate" DESC, c."ntsbNumber" DESC
```

This list as a web page: https://openairdocs.org/ntsb?occurrence=190&year=1991

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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.