# NTSB investigations, 1990: Main 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 MIA91IA032](https://openairdocs.org/ntsb/MIA91IA032.md): ATR ATR-42-300 · St. Thomas · Incident · No injuries · Incident investigation · Final report · Nov 26, 1990 · N971NA · Minor damage
  > The failure of the left main landing gear side brace lower arm due to fatigue resulting from corrosion formation, which resulted from improper design to prevent corrosion formation.
- [NTSB MIA91LA003](https://openairdocs.org/ntsb/MIA91LA003.md): Beech C-90 · Tampa, FL · Accident · No injuries · Limited investigation · Final report · Oct 3, 1990 · N7128J · Substantial damage
  > The lack of lubrication by maintenance personnel of the nose landing gear actuator.
- [NTSB MIA90LA192](https://openairdocs.org/ntsb/MIA90LA192.md): Cessna 402B · St. Thomas · Accident · No injuries · Limited investigation · Final report · Sep 24, 1990 · N4440K · Substantial damage
  > Separation of the left main landing gear torque tube bracket assembly due to sheared rivets from a previous hard side load landing which was not reported.
- [NTSB ANC90LA180](https://openairdocs.org/ntsb/ANC90LA180.md): Cessna 185 · Upper Colleen, AK · Accident · No injuries · Limited investigation · Final report · Sep 18, 1990 · N70087 · Substantial damage
  > The pilot-in-command's failure to select suitable terrain for landing. Contributing to the accident was the rough and uneven terrain.
- [NTSB CHI90LA238](https://openairdocs.org/ntsb/CHI90LA238.md): Mooney M20B · Winfield, KS · Accident · No injuries · Limited investigation · Final report · Aug 18, 1990 · N74745 · Substantial damage
  > Non-compliance of an airworthiness directive by maintenance personnel.
- [NTSB BFO90LA069](https://openairdocs.org/ntsb/BFO90LA069.md): Cessna 170B · Frederick, MD · Accident · No injuries · Limited investigation · Final report · Aug 16, 1990 · N8239A · Substantial damage
  > Fatigue failure of the left main gear wheel axle.
- [NTSB NYC90LA170](https://openairdocs.org/ntsb/NYC90LA170.md): Cessna 340A · Prospect, PA · Accident · No injuries · Limited investigation · Final report · Jul 22, 1990 · N555KB · Substantial damage
  > An on ground collision with terrain after the right main landing gear side brace failed due to shear from the soft, wet, rough runway, allowing the right main landing gear to collapse.
- [NTSB LAX90LA242](https://openairdocs.org/ntsb/LAX90LA242.md): Cessna 340 · Salinas, CA · Accident · No injuries · Limited investigation · Final report · Jul 1, 1990 · N5411M · Substantial damage
  > The failure of maintenance personnel to reinstall the landing gear retract/extension linkage and the failure of inspection personnel to detect the improper installation.
- [NTSB MIA90LA141](https://openairdocs.org/ntsb/MIA90LA141.md): Beech D95A · Mayaguez, PR · Accident · No injuries · Limited investigation · Final report · Jun 13, 1990 · N744GP · Substantial damage
  > The pilot failed to property align the aircraft with the runway. A factor in the accident was the strong, gusty crosswind.
- [NTSB DEN90LA118](https://openairdocs.org/ntsb/DEN90LA118.md): Cessna 310 · Ogden, UT · Accident · No injuries · Limited investigation · Final report · May 28, 1990 · N8148M · Substantial damage
  > The failure of the main gear locking mechanism.
- [NTSB ANC90LA073](https://openairdocs.org/ntsb/ANC90LA073.md): Piper PA-18 · Talkeetna, AK · Accident · No injuries · Limited investigation · Final report · May 21, 1990 · N2515A · Substantial damage
  > Collapse of the left main landing gear due to an overload failure induced by previous damage which occurred during an improper level-off by the pilot.
- [NTSB LAX90LA150](https://openairdocs.org/ntsb/LAX90LA150.md): Piper PA46 · Paso Robles, CA · Accident · No injuries · Limited investigation · Final report · Apr 17, 1990 · N4387S · Substantial damage
  > Inadequate altitude for proper landing gear extension; not ensuring the landing gear was down and locked; complacency of the certified flight instructor.
- [NTSB LAX90LA120](https://openairdocs.org/ntsb/LAX90LA120.md): Cessna 414 · Ramona, CA · Accident · No injuries · Limited investigation · Final report · Mar 16, 1990 · N711AG · Destroyed
  > Right main gear scissors assemlby becoming disconnected during landing roll, allowing the right run landing gear to collapse; scissor assembly washers not being replaced as recommended in Cessna aircraft service bulletin ME83-37..
- [NTSB CHI90LA085](https://openairdocs.org/ntsb/CHI90LA085.md): Piper PA-28-161 · Pontiac, MI · Accident · No injuries · Limited investigation · Final report · Feb 18, 1990 · N8394D · Substantial damage
  > Overload failure of the left main landing gear attach bolts for an undetermined reason.

## 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") = 1990
  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" = 191)
ORDER BY c."eventDate" DESC, c."ntsbNumber" DESC
```

This list as a web page: https://openairdocs.org/ntsb?occurrence=191&year=1990

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