# NTSB investigations, 2011: 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 ERA12LA117](https://openairdocs.org/ntsb/ERA12LA117.md): Piper PA-44-180 · Lawrenceville, GA · Accident · No injuries · Limited investigation · Final report · Dec 19, 2011 · N790GK · Substantial damage
  > The mechanic's improper installation and lubrication of the bushing on the right main landing gear truss assembly, which resulted in the landing gear not locking in the down position.
- [NTSB WPR12LA052](https://openairdocs.org/ntsb/WPR12LA052.md): Beech 76 · San Carlos, CA · Accident · No injuries · Limited investigation · Final report · Dec 2, 2011 · N23852 · Substantial damage
  > The collapse of the right main landing gear during the turn off the runway due to the failure of the A-frame assembly.
- [NTSB WPR12LA047](https://openairdocs.org/ntsb/WPR12LA047.md): Cessna 310I · Sedona, AZ · Accident · No injuries · Limited investigation · Final report · Nov 25, 2011 · N8059M · Substantial damage
  > The collapse of the right main landing gear after landing for a reason that could not be determined because postaccident examination did not reveal any anomalies that would have precluded normal operation, and postaccident testing could not be performed due…
- [NTSB ERA12WA091](https://openairdocs.org/ntsb/ERA12WA091.md): Piper PA23 · Quibdo, Colombia · Incident · No injuries · Foreign investigation · Nov 23, 2011 · HK1263 · Minor damage
  > On November 23, 2011, about 1717 UTC, a Piper PA-23-250, Colombian registration HK1263, operated by Aerolineas Alas de Colombia LTDA, experienced collapse of the left main landing gear during the landing roll at the El Carano Airport (SKUI), Quibdo, Colombia.…
- [NTSB ERA12CA079](https://openairdocs.org/ntsb/ERA12CA079.md): Beech C-45G · Lyman, MS · Accident · No injuries · Data collection · Final report · Nov 19, 2011 · N75Q · Substantial damage
  > The collapse of the right main landing gear during landing due to an encounter with soft terrain.
- [NTSB ERA12LA069](https://openairdocs.org/ntsb/ERA12LA069.md): Grenier Raymond Vans Aircraft RV-8 · Nashua, NH · Accident · No injuries · Limited investigation · Final report · Nov 9, 2011 · N220RG · Substantial damage
  > The right main landing gear collapse due to the overload fracture of the hardware for reasons that could not be determined during postaccident testing and examination.
- [NTSB ERA12WA067](https://openairdocs.org/ntsb/ERA12WA067.md): Cessna 402 · Quibdo, Colombia · Incident · No injuries · Foreign investigation · Nov 4, 2011 · HK4417 · Minor damage
  > On November 4, 2011, about 1640 UTC, a Cessna 402C, Colombian registration HK4417, registered to and operated by AeroEjecutivos De Antioquia S.A. experienced collapse of the left main landing gear during the takeoff roll from El Carano Airport (SKUI), Quibdo,…
- [NTSB ERA12CA028](https://openairdocs.org/ntsb/ERA12CA028.md): Piper PA-28R-201T · Culpeper, VA · Accident · No injuries · Data collection · Final report · Oct 6, 2011 · N9268C · Substantial damage
  > The pilot's inadequate knowledge of the airplane's emergency gear extension procedures, which resulted in his failure to successfully perform a manual extension of the landing gear.
- [NTSB WPR11CA468](https://openairdocs.org/ntsb/WPR11CA468.md): Beech 36 · Riverton, WY · Accident · No injuries · Data collection · Final report · Sep 24, 2011 · N7549N · Substantial damage
  > The pilot's inadvertent retraction of the landing gear during the landing roll.
- [NTSB CEN11CA661](https://openairdocs.org/ntsb/CEN11CA661.md): Luscombe 8A · Huntington, IN · Accident · No injuries · Data collection · Final report · Sep 10, 2011 · N71212 · Substantial damage
  > The failure of the right main landing gear strut due to internal corrosion.
- [NTSB ERA11LA484](https://openairdocs.org/ntsb/ERA11LA484.md): North American TB-25N · Georgetown, DE · Accident · No injuries · Limited investigation · Final report · Sep 4, 2011 · N9079Z · Substantial damage
  > Maintenance personnel's inadequate examination of the main landing gear during the airplane’s most recent conditional inspection, which resulted in the fatigue failure of the right main landing gear shock strut drag arm during the landing roll.
- [NTSB WPR11LA427](https://openairdocs.org/ntsb/WPR11LA427.md): Stinson V77 · Tillamook, OR · Accident · No injuries · Limited investigation · Final report · Sep 3, 2011 · N9112H · Substantial damage
  > The pilot’s loss of directional control while taxiing in a gusting tailwind.
- [NTSB WPR11LA436](https://openairdocs.org/ntsb/WPR11LA436.md): Tubbs S/Performance PA-18 225DD · Mile Hi Landing Strip, ID · Accident · No injuries · Limited investigation · Final report · Aug 25, 2011 · N727WW · Substantial damage
  > The collapse of the left landing gear during landing for undetermined reasons.
- [NTSB ANC11TA079](https://openairdocs.org/ntsb/ANC11TA079.md): Dehavilland DHC-2 MK. I(L20A) · Northway, AK · Accident · No injuries · Final report · Aug 3, 2011 · N723DR · Substantial damage
  > The pilot's failure to identify unsuitable terrain for landing and subsequent contact with a dirt mound, resulting in the separation of the tailwheel from the airframe.
- [NTSB WPR11LA370](https://openairdocs.org/ntsb/WPR11LA370.md): Piper J5A · Biddle, MT · Accident · No injuries · Limited investigation · Final report · Jul 24, 2011 · N38AW · Substantial damage
  > Failure of the left main landing gear strut during the landing roll due to a preexisting crack.
- [NTSB CEN11LA494](https://openairdocs.org/ntsb/CEN11LA494.md): Cessna T210L · Columbia, MO · Accident · No injuries · Limited investigation · Final report · Jul 20, 2011 · N2056S · Substantial damage
  > The collapse of the right main landing gear during landing due to a lack of component lubrication, which resulted in the failure of the landing gear to lock once extended.
- [NTSB ERA11LA357](https://openairdocs.org/ntsb/ERA11LA357.md): Cessna 182F · Warrenton, VA · Accident · No injuries · Limited investigation · Final report · Jun 23, 2011 · N3152U · Substantial damage
  > The fatigue failure of the left main landing gear due to inadequate maintenance inspection that did not detect and correct corrosion pitting.
- [NTSB ANC11CA049](https://openairdocs.org/ntsb/ANC11CA049.md): Champion 7HC · Kenai, AK · Accident · No injuries · Data collection · Final report · Jun 16, 2011 · N8976R · Substantial damage
  > The pilot's selection of unsuitable terrain for landing, resulting in the collapse of the main landing gear, and a nose over.
- [NTSB ERA11IA316](https://openairdocs.org/ntsb/ERA11IA316.md): Israel Aircraft Industries Gulfstream 200 · Newburgh, NY · Incident · No injuries · Incident investigation · Final report · May 27, 2011 · N749QS · Minor damage
  > The flight crew did not ensure that the landing gear selector handle was in the full down (extend) position. Contributing to the incident was inadequate checklist information.
- [NTSB DCA11WA064](https://openairdocs.org/ntsb/DCA11WA064.md): Boeing 737 · Brussels, Belgium · Accident · No injuries · Foreign investigation · May 26, 2011 · SP-LLB · Substantial damage
  > The Belgium Air Accident Investigation Unit (AAIU) has notified the NTSB of an accident involving a B737-45D that occurred on May 26, 2011. The NTSB has appointed a U.S. Accredited Representative to assist the AAIU investigation under the provisions of ICAO…
- [NTSB CEN11LA361](https://openairdocs.org/ntsb/CEN11LA361.md): Flournoy Martin R Flournoy MR S1S · Colorado Springs, CO · Accident · No injuries · Limited investigation · Final report · May 22, 2011 · N457CF · Substantial damage
  > The pilot’s loss of directional control during the landing rollout due to failure of the tailwheel assembly for undetermined reasons.
- [NTSB CEN11LA357](https://openairdocs.org/ntsb/CEN11LA357.md): Cessna T210M · Pueblo, CO · Accident · No injuries · Limited investigation · Final report · May 21, 2011 · N6850B · Substantial damage
  > Failure of the landing gear to fully extend due to a failed o-ring in the nose gear actuator piston and a broken seal in the emergency landing gear extension system.
- [NTSB CEN11IA341](https://openairdocs.org/ntsb/CEN11IA341.md): Beech 1900D · Denver, CO · Incident · No injuries · Incident investigation · Final report · May 17, 2011 · N218YV · Minor damage
  > The fatigue failure of the nose landing gear (NLG) end cap, which resulted in insufficient hydraulic pressure to secure the left main landing gear into the down and locked position. Contributing to the fatigue failure was the NLG end cap’s non-optimum grain…
- [NTSB ERA11LA264](https://openairdocs.org/ntsb/ERA11LA264.md): Piper PA-28-161 · Meriden, CT · Accident · No injuries · Limited investigation · Final report · Apr 22, 2011 · N2838D · Substantial damage
  > Maintenance personnel's inadequate inspection of the main landing gear, which resulted in a failure of the right main landing gear’s inboard torque link lug due to a fatigue fracture. Contributing to the accident was owner's lack of compliance with a factory…
- [NTSB ERA11LA231](https://openairdocs.org/ntsb/ERA11LA231.md): Cessna 172RG · Okeechobee, FL · Accident · No injuries · Limited investigation · Final report · Apr 6, 2011 · N5284V · Substantial damage
  > The failure of the main landing gear to lock in the extended position for undetermined reasons and both pilots’ failure to ensure that the landing gear was down and locked prior to landing.
- [NTSB ERA11LA221](https://openairdocs.org/ntsb/ERA11LA221.md): Cessna 310F · Sanford, FL · Accident · No injuries · Limited investigation · Final report · Apr 1, 2011 · N6781X · Substantial damage
  > The failure of the nose landing gear due to inadequate servicing of the nose gear strut reservoir.
- [NTSB CEN11LA254](https://openairdocs.org/ntsb/CEN11LA254.md): North American B25 · Encinal, TX · Accident · No injuries · Limited investigation · Final report · Mar 26, 2011 · N747AF · Substantial damage
  > The co-pilot’s premature retraction of the landing gear during takeoff, which resulted in a gear collapse and impact with the runway surface.
- [NTSB ANC11CA018](https://openairdocs.org/ntsb/ANC11CA018.md): Cessna A185F · Aniak, AK · Accident · No injuries · Data collection · Final report · Mar 19, 2011 · N5182H · Substantial damage
  > The inadvertent contact with a rut in the snow while taxiing, resulting in the collapse of the right main landing gear.
- [NTSB ENG11WA054](https://openairdocs.org/ntsb/ENG11WA054.md): Bell 412 - EP · Zakum Field, United Arab Emirates · Incident · No injuries · Foreign investigation · Mar 16, 2011 · A6-FLV · Minor damage
  > On March 16, 2011, about 0718 coordinated universal time, a Bell 412EP helicopter, United Arab Emirates (UAE) registration A6-FLV, experienced a failure of the landing gear aft cross tube during loading of the helicopter at Zakum Field, UAE. The investigation…
- [NTSB ERA11LA191](https://openairdocs.org/ntsb/ERA11LA191.md): Cessna 414 · New York, NY · Accident · No injuries · Limited investigation · Final report · Mar 14, 2011 · N40NY · Substantial damage
  > The improper rigging of the right main landing gear, which resulted in ovestress fractures of a bolt and aft lug on the trunnion assembly.
- [NTSB CEN11FA220](https://openairdocs.org/ntsb/CEN11FA220.md): Mooney M20J · Romeoville, IL · Accident · No injuries · Field investigation · Final report · Feb 19, 2011 · N888DF · Substantial damage
  > The collapse of the left main landing gear during the landing roll for undetermined reasons.
- [NTSB CEN11LA173](https://openairdocs.org/ntsb/CEN11LA173.md): Cessna 402 · Albuquerque, NM · Accident · No injuries · Limited investigation · Final report · Feb 3, 2011 · N5802C · Substantial damage
  > The failure of the landing gear system for undetermined reasons.
- [NTSB WPR11LA108](https://openairdocs.org/ntsb/WPR11LA108.md): Piper PA-28-201T · Santa Ana, CA · Accident · No injuries · Limited investigation · Final report · Jan 21, 2011 · N47589 · Substantial damage
  > The failure of the left main landing gear due to the lack of lubrication.
- [NTSB CEN11CA155](https://openairdocs.org/ntsb/CEN11CA155.md): Cessna R182 · Houston, TX · Accident · No injuries · Data collection · Final report · Jan 19, 2011 · N6187S · Substantial damage
  > The failure of the landing gear to fully extend and lock in the down position due to the inoperative electric pump motor.
- [NTSB ERA11IA172](https://openairdocs.org/ntsb/ERA11IA172.md): Mitsubishi MU-2B-20 · Walterboro, SC · Incident · No injuries · Incident investigation · Final report · Jan 16, 2011 · N52CD · Minor damage
  > The inadequate inspection and rigging of the nose landing gear downlock mechanism by maintenance personnel, which resulted in the failure of a bolt and the subsequent collapse of the nose gear during the landing roll.

## 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") = 2011
  AND c."mKey" IN (SELECT e.case_mkey FROM 'https://openairdocs.org/data/latest/ntsb_events.parquet' e WHERE 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?year=2011

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