# NTSB LAX92LA223: Aerospatiale TB-20, N2824F, Groveland, CA, May 25, 1992

- Type: NTSB accident investigation
- Classification: Accident · No injuries · Limited investigation · Final report
- Date: May 25, 1992, 14:00 local (21:00 UTC)
- Place: Groveland, CA
- Coordinates: 37.85086, -120.009269 (estimated)
- Nearby events: https://openairdocs.org/map.md?lat=37.8509&lon=-120.0093&mi=10
- Phase of flight: [Landing](https://openairdocs.org/ntsb-phases/550) (OpenAirDocs' grouping)
- Highest injury: No injuries
- Injuries: 2 uninjured
- Status: Completed, report June 30, 1993
- Report: Approved by Office Director
- NTSB case key (mKey): 27629
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=LAX92LA223
- NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/27629/pdf
- Page: https://openairdocs.org/ntsb/LAX92LA223

## Probable cause

THE PILOT'S INADVERTENT PLACEMENT OF THE LANDING GEAR SELECTOR IN THE UP POSITION DURING THE INITIAL PORTION OF THE LANDING ROLLOUT.

## Sequence of events

In NTSB's coding before 2008 (https://www.ntsb.gov/GILS/Documents/codman.pdf).

- Main gear collapsed, landing - roll
  - landing gear,gear lever - deployed inadvertently (cause)
  - gear retraction - selected, pilot in command (cause)
- On ground/water encounter with terrain/water, landing - roll
  - terrain condition - ditch

## Analysis

THE PILOT REPORTED THAT APPROACHING THE DESTINATION AIRPORT HE EXTENDED THE WING FLAPS, LOWERED THE LANDING GEAR AND OBSERVED THREE GREEN GEAR LIGHTS.  THE AIRPLANE 'FLOATED' OVER THE 3640-FOOT LONG RUNWAY AND INITIALLY TOUCHED DOWN 800 TO 900 FEET BEYOND THE THRESHOLD.  THEREAFTER, THE RIGHT MAIN LANDING GEAR PARTIALLY RETRACTED, THE WING CONTACTED THE RUNWAY'S SURFACE AND THE AIRPLANE VEERED INTO A DITCH.  DURING THE EXAMINATION OF THE WRECKAGE, THE WING FLAPS WERE FOUND IN THE RETRACTED POSITION AND THE LANDING GEAR SYSTEM FUNCTIONED NORMALLY.  THE PHYSICAL EVIDENCE INDICATED THAT DURING ROLLOUT THE LANDING GEAR MOTOR WAS ACTIVATED WHILE SOME WEIGHT WAS ON THE LEFT MAIN GEAR.  THIS RESULTED IN A BENDING OF THE LEFT GEAR ACTUATOR ARM AND THE PARTIAL RETRACTION OF THE RIGHT GEAR.  THE FLAPS WERE FOUND GROUND IMPACT DAMAGED AND RETRACTED.

## Aircraft

- Registration: [N2824F](https://openairdocs.org/aircraft/N2824F), registered now, S/N 1103, built 1990 (OpenAirDocs)
- Reported make and model: AEROSPATIALE TB-20
- Registry model: [Socata TB-20 TRINIDAD](https://openairdocs.org/model/socata-tb-20-trinidad) (registry code 8680695) (OpenAirDocs)
- Registry engine: [Lycoming IO-540 series](https://openairdocs.org/engine/lycoming-io-540-series) (registry code 41530, reciprocating) (OpenAirDocs)
- Category: Airplane
- Serial number: 1103
- Airframe hours: 231
- Engines: LYCOMING IO-540-C4D5 250 horsepower reciprocating
- Damage: Substantial damage
- Flight: Personal, Part 91
- Operator: Paul James
- Registered owner: Paul James
- Airworthiness certificate: Standard, Normal
- Last inspection: 100 hour, April 24, 1992, 26 hours before
- Departed: MRY, MONTEREY, CA
- Airport: Q68, Groveland, runway 27, 3,640 × 50 ft, asphalt

## Flight crew

As NTSB recorded them. NTSB leaves out names.

- Pilot; age 52; private; airplane ratings: single-engine land; medical: class 3, valid medical--w/ waivers/lim; seat: left; flight hours: 345 total, 57 in this make and model, 237 as pilot in command, 32 in the last 90 days, 12 in the last 30 days, 2 in the last 24 hours

## Weather

- Conditions: Visual (VMC), Day
- Visibility: 30 statute miles
- Lowest ceiling: none
- Temperature: 90 °F

## FAA reports on this event (1)

The FAA's own accident and incident reports, matched to the aircraft by N-number and date (OpenAirDocs).

- [Accident 19920525017099A](https://openairdocs.org/incident/19920525017099A), May 25, 1992: Socata TB20TRINIDAD, Groveland, CA, Substantial damage. Right main gear collapsed on landing roll. Conditions indicate gear was raised then reversed. Flaps were down.

From the NTSB's public API. Aircraft are matched to registry aircraft by N-number and event date, checked against the reported serial number, make and model; the registry's history has gaps, so older matches can be wrong. Compare the reported make and model.

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