# NTSB investigations: Lycoming TI0-540 series: Landing gear collapse

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 ERA25LA314](https://openairdocs.org/ntsb/ERA25LA314.md): Piper PA32R · Miami, FL · Accident · No injuries · Class 4 · Limited · Final report · Aug 20, 2025 · N990DM · Substantial damage
  > An inflight loss of hydraulic fluid from the landing gear system through a cracked fitting, which resulted in a landing gear collapse upon touchdown.
- [NTSB WPR25LA301](https://openairdocs.org/ntsb/WPR25LA301.md): Piper PA-24-260 · West Yellowstone, MT · Accident · No injuries · Class 3 · Limited · Preliminary report · Jun 29, 2025 · N9366P · Substantial damage
  > On June 29, 2025, at 1033 mountain daylight time, a Piper PA-24-260, N9366P, was substantially damaged when it was involved in an accident near West Yellowstone, Montana. The pilot was not injured. The airplane was operated as a Title 14 Code of Federal…
- [NTSB GAA23WA195](https://openairdocs.org/ntsb/GAA23WA195.md): Piper PA-23-250 · The Valley, Anguilla · Accident · Class 5 · Foreign · Jul 4, 2023 · N15YP
- [NTSB WPR23LA116](https://openairdocs.org/ntsb/WPR23LA116.md): Piper PA-24-260 · San Jose, CA · Accident · No injuries · Class 3 · Limited · Final report · Feb 20, 2023 · N9267P · Substantial damage
  > A landing gear collapse due to an inadequately maintained landing gear extension and retraction system.
- [NTSB GAA22WA207](https://openairdocs.org/ntsb/GAA22WA207.md): Piper PA-23-250 · The Settlement, British Virgin Islands · Accident · No injuries · Class 5 · Foreign · Jun 23, 2022 · N13987 · Substantial damage
- [NTSB WPR22LA249](https://openairdocs.org/ntsb/WPR22LA249.md): Piper PA-32R-301T · Red Bluff, CA · Accident · No injuries · Class 4 · Limited · Final report · Jun 20, 2022 · N4383D · Substantial damage
  > The pilot’s failure to detect the tripped landing gear motor circuit breaker, which prevented the gear from fully locking in the down position, and subsequent collapse during landing.
- [NTSB CEN22LA257](https://openairdocs.org/ntsb/CEN22LA257.md): Piper PA-32R-300 · Gettysburg, SD · Accident · No injuries · Class 3 · Limited · Final report · Jun 5, 2022 · N901BW · Substantial damage
  > An inadvertent hard landing by the pilot.
- [NTSB ERA19LA279](https://openairdocs.org/ntsb/ERA19LA279.md): Piper PA23 · Charlotte Amalie · Accident · No injuries · Class 3 · Limited · Final report · Sep 12, 2019 · N269KW · Substantial damage
  > The collapse of the left main landing gear for undetermined reasons.
- [NTSB WPR18LA272](https://openairdocs.org/ntsb/WPR18LA272.md): Smith AEROSTAR601 · Heber, UT · Accident · No injuries · Class 3 · Limited · Final report · Sep 25, 2018 · N90339 · Substantial damage
  > A recent hard landing resulted in a fracture of a joint from a cylinder to a main landing gear.
- [NTSB GAA18WA590](https://openairdocs.org/ntsb/GAA18WA590.md): Aero Commander 500 · Canefield Airoprt, Dominica · Accident · No injuries · Foreign investigation · Jul 27, 2018 · N590DR · Substantial damage
  > The government of Dominica has notified the NTSB of an accident involving a AERO COMMANDER 500 airplane that occurred on July 27, 2018. The NTSB has appointed a U.S. Accredited Representative to assist the government of Dominica's investigation under the…
- [NTSB CEN18LA017](https://openairdocs.org/ntsb/CEN18LA017.md): Piper PA 32RT-300T · Port Mansfield, TX · Accident · No injuries · Limited investigation · Final report · Oct 19, 2017 · N633CB · Substantial damage
  > The pilot’s improper landing flare, which led to a hard landing and the subsequent collapse of the nosewheel landing gear due to the overstress failure of the nosewheel landing gear trunnion casting.
- [NTSB CEN15LA147](https://openairdocs.org/ntsb/CEN15LA147.md): Piper PA 31-350 · Chicago, IL · Accident · No injuries · Limited investigation · Final report · Feb 16, 2015 · N727SC · Substantial damage
  > The collapse of the nose and right main landing gears during landing for reasons that could not be determined because examination of the landing gear system revealed no evidence of mechanical malfunctions or failures that would have precluded normal operation.
- [NTSB CEN15LA078](https://openairdocs.org/ntsb/CEN15LA078.md): Piper PA 46 350P · Houston, TX · Accident · No injuries · Limited investigation · Final report · Dec 15, 2014 · N224JJ · Substantial damage
  > The nose landing gear collapse as a result of the fracture of the engine mount at the nose gear actuator attachment point in an area that a service bulletin (SB) recommended for inspection. Contributing to the accident was maintenance personnel’s inadequate…
- [NTSB WPR14LA142](https://openairdocs.org/ntsb/WPR14LA142.md): Bellanca 17 31 · Salt Lake City, UT · Accident · No injuries · Limited investigation · Final report · Mar 21, 2014 · N28119 · Substantial damage
  > The failure of the right main landing gear extension spring to maintain adequate pressure, which allowed the landing gear to collapse during the landing roll.
- [NTSB WPR14LA105](https://openairdocs.org/ntsb/WPR14LA105.md): Piper PA 23-250 · Camarillo, CA · Accident · No injuries · Limited investigation · Final report · Jan 28, 2014 · N5977Y · Substantial damage
  > The inadequate hydraulic pressure due to a damaged O-ring in the hydraulic powerpack, which prevented the right main landing gear (MLG) downlock from locking in the extended positon and allowed the right MLG to collapse during landing.
- [NTSB ERA14IA019](https://openairdocs.org/ntsb/ERA14IA019.md): Piper PA 46 350P · Tallahassee, FL · Incident · No injuries · Incident investigation · Final report · Oct 8, 2013 · N640BD · Minor damage
  > The failure of the nose landing gear (NLG) actuator attachment bolt due to fatigue for reasons that could not be determined during postincident examination, which resulted in the NLG collapsing during landing.
- [NTSB WPR13LA237](https://openairdocs.org/ntsb/WPR13LA237.md): Piper PA-32R-301T · Chandler, AZ · Accident · No injuries · Limited investigation · Final report · May 19, 2013 · N8197W · Substantial damage
  > The failure of the alternator and/or battery, which prevented the operation of the landing gear extension system and resulted in the nose landing gear collapsing during the landing roll.
- [NTSB ERA10LA108](https://openairdocs.org/ntsb/ERA10LA108.md): Piper PA-32R-300 · Concord, NC · Accident · No injuries · Limited investigation · Final report · Jan 1, 2010 · N8985C · Substantial damage
  > A missing right main landing gear aft trunnion mount attachment nut.
- [NTSB WPR09LA297](https://openairdocs.org/ntsb/WPR09LA297.md): Bellanca 17-31ATC · Roosevelt, UT · Accident · No injuries · Limited investigation · Final report · Jun 19, 2009 · N14797 · Substantial damage
  > The retraction of the left main landing gear due to the failure of the extension and retraction actuator arm attach bolt. Contributing to the accident was the failure of maintenance personnel to discover the extensive elongation of the actuator attach fitting…
- [NTSB SEA08LA064](https://openairdocs.org/ntsb/SEA08LA064.md): Piper PA-24-250 · Placerville, CA · Accident · No injuries · Limited investigation · Final report · Jan 12, 2008 · N7988P · Substantial damage
  > The collapse of the right main landing gear during landing for undetermined reasons.

## 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 ('41533')
    AND EXISTS (SELECT 1 FROM 'https://openairdocs.org/data/latest/ntsb_events.parquet' e WHERE e.case_mkey = x.case_mkey AND e.aircrafts_position = x.position AND e."isDefiningEvent" AND e."tier2Number" = '094'))
ORDER BY c."eventDate" DESC, c."ntsbNumber" DESC
```

This list as a web page: https://openairdocs.org/ntsb-events/094/cases?engine=41533

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