# NTSB investigations, CA: 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 SEA08LA029](https://openairdocs.org/ntsb/SEA08LA029.md): Piper PA-44-180 · Byron, CA · Accident · No injuries · Limited investigation · Final report · Nov 14, 2007 · N274ER · Substantial damage
  > The failure of the right main landing gear aft trunnion attach fitting due to overload during the landing roll.
- [NTSB LAX06LA225](https://openairdocs.org/ntsb/LAX06LA225.md): Cessna 210K · Novato, CA · Accident · No injuries · Limited investigation · Final report · Jul 5, 2006 · N12PF · Substantial damage
  > The failure of the left main landing gear to extend for undetermined reasons.
- [NTSB LAX03LA033](https://openairdocs.org/ntsb/LAX03LA033.md): Cessna 172M · Rosamond, CA · Accident · No injuries · Limited investigation · Final report · Nov 16, 2002 · N548RM · Substantial damage
  > The fatigue failure of left main landing gear strut at the upper fuselage aft attachment hole, which resulted in the collapse of the left main landing gear during the landing roll.
- [NTSB LAX02LA142](https://openairdocs.org/ntsb/LAX02LA142.md): Cessna 340A · Lancaster, CA · Accident · No injuries · Limited investigation · Final report · Apr 23, 2002 · N6304X · Substantial damage
  > The collapse of the right main landing gear as a result of a malfunctioning microswitch.
- [NTSB LAX00LA330](https://openairdocs.org/ntsb/LAX00LA330.md): Piper PA-28-161 · Palo Alto, CA · Accident · No injuries · Limited investigation · Final report · Sep 4, 2000 · N6462C · Substantial damage
  > The failure of maintenance personnel to detect and correct loose attachment fasteners and fretting at the landing gear attachment during maintenance inspections.
- [NTSB LAX00LA224](https://openairdocs.org/ntsb/LAX00LA224.md): Piper PA-20 · Quincy, CA · Accident · No injuries · Limited investigation · Final report · Jun 13, 2000 · N7451K · Substantial damage
  > The fracture and failure of the main landing gear strut to shock absorber attachment fitting.
- [NTSB LAX00LA004](https://openairdocs.org/ntsb/LAX00LA004.md): Cessna 421B · Montague, CA · Accident · No injuries · Limited investigation · Final report · Oct 5, 1999 · N69GP · Substantial damage
  > The collapse of the left main landing gear during the landing rollout for undetermined reasons, which resulted in the pilot's loss of directional control.
- [NTSB LAX97LA095](https://openairdocs.org/ntsb/LAX97LA095.md): Cessna 172RG · Corona, CA · Accident · No injuries · Limited investigation · Final report · Jan 28, 1997 · N80138 · Substantial damage
  > Failure of the pilot in command to follow the airplane's before landing checklist and verify the landing gear was fully extended before landing. Factors in the accident were anxiety and diversion of the pilot's attention due to fuel gauge readings.
- [NTSB LAX96LA260](https://openairdocs.org/ntsb/LAX96LA260.md): Cessna P210N · San Bernardino, CA · Accident · No injuries · Limited investigation · Final report · Jun 27, 1996 · N4844K · Substantial damage
  > failure of the landing gear to go and/or remain in a down-and-locked condition for undetermined reason(s).
- [NTSB LAX95LA251](https://openairdocs.org/ntsb/LAX95LA251.md): Mooney M-20-M · Santa Monica, CA · Accident · No injuries · Limited investigation · Final report · Jul 13, 1995 · N200CT · Substantial damage
  > the pilot's improper remedial action during an aborted takeoff due to an improperly installed pitot line to the airspeed indicator.
- [NTSB LAX95LA152](https://openairdocs.org/ntsb/LAX95LA152.md): American Champion 8KCAB · Long Beach, CA · Accident · No injuries · Limited investigation · Final report · Apr 1, 1995 · N111LS · Substantial damage
  > the failure and collapse of the left main landing gear due to a defective and improper weld by the manufacturer.
- [NTSB LAX94LA105](https://openairdocs.org/ntsb/LAX94LA105.md): Rockwell AC-112 · Modesto, CA · Accident · No injuries · Limited investigation · Final report · Jan 23, 1994 · N1084J · Substantial damage
  > the worn/chafed landing gear wire which provided intermittent electrical power to the hydraulic pump.
- [NTSB LAX93LA306](https://openairdocs.org/ntsb/LAX93LA306.md): Ayres S-2R-T34 · Tulare, CA · Accident · No injuries · Limited investigation · Final report · Jul 29, 1993 · N4016B · Substantial damage
  > the failure of the main gear inner lower tube assembly due to fatigue.
- [NTSB LAX92LA223](https://openairdocs.org/ntsb/LAX92LA223.md): Aerospatiale TB-20 · Groveland, CA · Accident · No injuries · Limited investigation · Final report · May 25, 1992 · N2824F · Substantial damage
  > The pilot's inadvertent placement of the landing gear selector in the up position during the initial portion of the landing rollout.
- [NTSB LAX92LA138](https://openairdocs.org/ntsb/LAX92LA138.md): Cessna 340A · Long Beach, CA · Accident · No injuries · Limited investigation · Final report · Mar 12, 1992 · N1362C · Substantial damage
  > The fatigue failure of the left main landing gear down lock bell crank pivot bolt.
- [NTSB LAX92LA139](https://openairdocs.org/ntsb/LAX92LA139.md): Cessna 210G · Livermore, CA · Accident · No injuries · Limited investigation · Final report · Mar 9, 1992 · N5885F · Substantial damage
  > The failure of the left main landing gear saddle.
- [NTSB LAX92LA009](https://openairdocs.org/ntsb/LAX92LA009.md): Cessna 210 · Riverside, CA · Accident · No injuries · Limited investigation · Final report · Oct 6, 1991 · N9517T · Substantial damage
  > The failure of a hydraulic gear return line, which caused the aircraft's main landing gear to collapse during landing touchdown.
- [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 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 LAX90DVG02](https://openairdocs.org/ntsb/LAX90DVG02.md): Schweizer G-164B · Knights Landing, CA · Accident · No injuries · Final report · Nov 18, 1989 · N6977K · Substantial damage
  > The failure of the right main Landing gear due to a sheared bolt that attached the spring leg to the gear.
- [NTSB LAX89LA201](https://openairdocs.org/ntsb/LAX89LA201.md): Piper PA-24-250 · San Diego, CA · Accident · No injuries · Limited investigation · Final report · May 20, 1989 · N6545P · Substantial damage
  > The collapse of the right main landing gear due to a bent rod end which prevented the landing gear drag link to lock over center.
- [NTSB LAX89FA160](https://openairdocs.org/ntsb/LAX89FA160.md): Sikorsky S-58ET · Santa Ana, CA · Accident · Minor injuries · Field investigation · Final report · Apr 15, 1989 · N1168U · Substantial damage
  > Failure of the landing gear resulting from excessive loading during ground operations, and fatigue cracking.
- [NTSB LAX88DUG03](https://openairdocs.org/ntsb/LAX88DUG03.md): Stolp-Starduster Too SA-300-A · Chino, CA · Accident · No injuries · Final report · May 5, 1988 · N1300S · Substantial damage
  > During the ground run for take off, the left main gear strut broke. The main landing gear collapsed resulting in substantial damage. The reason for the strut failure was undetermined.
- [NTSB LAX88LA122](https://openairdocs.org/ntsb/LAX88LA122.md): Piper PA-34-200T · Lower Lake, CA · Accident · No injuries · Limited investigation · Final report · Mar 11, 1988 · N1555X · Substantial damage
  > Drg the lndg roll, the left main lndg gear collapsed & the acft veered off the rwy, further damaging the aircraft. An investigation revealed the left main landing gear trunnion had failed. It had failed diagonally aprx 5 inches from the bottom of the trunnion…
- [NTSB LAX87LA254](https://openairdocs.org/ntsb/LAX87LA254.md): Beech C90 · Lakeport, CA · Accident · No injuries · Limited investigation · Final report · Jun 29, 1987 · N2030W · Substantial damage
  > The pilot indicated that the left main gear collapsed during landing rollout. The pilot did not respond to the following questions, when asked during a telephone interview, 'when was the gear placed down? And what did the gear safe indicator lights indicate…
- [NTSB LAX87DVG03](https://openairdocs.org/ntsb/LAX87DVG03.md): Grumman G-164B · Marysville, CA · Accident · No injuries · Final report · Apr 18, 1987 · N8412K · Substantial damage
  > At the end of an aerial application flt, the plt was aware of a cross wind from the right. The plt touched the acft down on the right main landing gear and held that attitude for aprx 300 ft down the rwy. When the left main gear contacted the rwy it folded…
- [NTSB LAX86LA005](https://openairdocs.org/ntsb/LAX86LA005.md): Willie II · Blythe, CA · Accident · Minor injuries · Limited investigation · Final report · Oct 5, 1985 · N7919 · Substantial damage
  > On oct 5, 1985 a Willie ii homebuilt crashed on takeoff after its left main landing gear collapsed. VMC existed at the time and no flt plan was filed. The ac sustained substantial damage and the two occupants received minor injuries. The winds were from 050.…
- [NTSB LAX85LA306](https://openairdocs.org/ntsb/LAX85LA306.md): Cessna 421A · San Diego, CA · Accident · No injuries · Limited investigation · Final report · Jul 4, 1985 · N222CF · Substantial damage
  > During landing roll out the right main gear collapsed in an outward direction. Exam of the rt gear revealed that the bolt which is associated with the upper & lower gear torque links was missing. An exam of the left gear assembly revealed that the required…
- [NTSB LAX85LA298](https://openairdocs.org/ntsb/LAX85LA298.md): Beech 95-B55 · Thermal, CA · Accident · No injuries · Limited investigation · Final report · Jul 1, 1985 · N18387 · Substantial damage
  > At the conclusion of a cross country business flt, the plt stated that after 'easing the nosewheel down onto the runway' he reached for the flap lever but put his hand 'on the gear lever instead.' As he 'pulled the lever out of the detent tripping it,' the…
- [NTSB LAX85LA168](https://openairdocs.org/ntsb/LAX85LA168.md): Boeing B75-N1 · Blythe, CA · Accident · No injuries · Limited investigation · Final report · Mar 5, 1985 · N844TH · Substantial damage
  > During landing roll the left gear collapsed & the acft ground looped. Exam of the left gear strut revealed presence of a preexisting crack. The crack was located inside the gear casting & it was not visible during preflight inspections. The acft reportedly…
- [NTSB LAX85LA151](https://openairdocs.org/ntsb/LAX85LA151.md): Champion 7GC · Yuba City, CA · Accident · No injuries · Limited investigation · Final report · Feb 22, 1985 · N4846E · Substantial damage
  > Shortly after takeoff the plt was informed by another plt that his right main landing gear was hanging down. The plt performed a fly-by then proceeded to land the acft in a grass area between the runway and taxiway. The acft was substantially damaged during…
- [NTSB LAX85LA127](https://openairdocs.org/ntsb/LAX85LA127.md): Helio H-295 · Lower Lake, CA · Accident · No injuries · Limited investigation · Final report · Jan 30, 1985 · N269E · Substantial damage
  > Plt attempted to abort a takeoff as the acft became airborne at aprx 40 mph. The right main gear collapsed when the acft touched down while it was yawed to the left.
- [NTSB LAX83LA451](https://openairdocs.org/ntsb/LAX83LA451.md): Piper PA 38-112 · San Martin, CA · Accident · No injuries · Limited investigation · Final report · Sep 20, 1983 · N2315V · Substantial damage
  > The pilot stated that he flared the aircraft and made a normal full stall landing. Almost immediately the aircraft veered to the left and both main landing gear separated. Subsequent hardness tests on the left and right main gear attach bolts revealed that…
- [NTSB LAX83LA196](https://openairdocs.org/ntsb/LAX83LA196.md): Homebuilt Starduster TWO · El Monte, CA · Accident · No injuries · Limited investigation · Final report · Apr 16, 1983 · N714ST · Substantial damage
  > The acft was obsved by a twr ATC specialist to make a normal 3 pt lndg and enter into a l gd loop while exiting the rwy abt 1400 ft fm the threshold. He further stated that the acft was traveling at a 'moderate speed' while exiting the rwy. Another acft was…
- [NTSB LAX83FA082](https://openairdocs.org/ntsb/LAX83FA082.md): Cessna 401 · Lompoc, CA · Accident · No injuries · Field investigation · Final report · Jan 26, 1983 · N11JR · Substantial damage
  > The acft went off the left side of the runway during landing after the left main landing gear collapsed. This was an airtaxi flight and one of the passengers confirmed that all 3 landing gear green lights were illuminated. Examination of the left main gear…
- [NTSB LAX83IA073](https://openairdocs.org/ntsb/LAX83IA073.md): Boeing 747-123 · Los Angeles, CA · Incident · No injuries · Incident investigation · Final report · Jan 16, 1983 · N9664 · Minor damage
  > The left main landing gear collapsed while the acft was taxiing for takeoff. Dissambly revealed that the outer cylinder was shattered & metallurgical examination revealed abrasive grinding & environmetally accelerated fatigue prior to rapidfracture.
- [NTSB LAX82FA250](https://openairdocs.org/ntsb/LAX82FA250.md): Cessna 414 · Burbank, CA · Accident · No injuries · Field investigation · Final report · Jul 8, 1982 · N46TA · Substantial damage
  > The left landing gear collapsed during landing roll. A retraction test of the left main gear and a chock of the downlocktension could not be made due to extensive damage.
- [NTSB LAX82FUM08](https://openairdocs.org/ntsb/LAX82FUM08.md): Bellanca 8GCBC · Jacumba, CA · Accident · No injuries · Final report · Jun 26, 1982 · N88049 · Substantial damage
  > After towing a glider, the pilot returned to the airport and landed. While taxiing, the left main gear collapsed and the left wing and propeller were damaged. An investigation revealed that the a landing gear attaching u-bolt, pn 1-10376, had failed. About…
- [NTSB LAX82FVG18](https://openairdocs.org/ntsb/LAX82FVG18.md): Cessna 320C · Sacramento, CA · Accident · No injuries · Final report · Feb 27, 1982 · N14MC · Substantial damage
  > On the previous flight, the landing gear was cycled two or three times without a safe indication while using the normal gear extension system. The gear was then hand cranked down and a safe light was obtained. After the flight, a gear retraction test was…
- [NTSB LAX82DA046](https://openairdocs.org/ntsb/LAX82DA046.md): Air Tractor 301 · Dos Palos, CA · Accident · No injuries · Final report · Jan 21, 1982 · N8793S · Substantial damage
  > During the takeoff roll the pilot decided that he was not going to clear an 8 foot chain-link fence at the end of the runway. He stated that he pulled the dump-gate, chopped the throttle, and put on the brake but the aircraft went into soft dirt and the right…

## 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."eventStateOrRegion" = 'CA' AND c."eventCountry" = 'USA'
  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&state=CA

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