# NTSB LAX93LA116: Cessna 210, N9668T, Fullerton, CA, February 12, 1993

- Type: NTSB accident investigation
- Classification: Accident · No injuries · Limited investigation · Final report
- Date: February 12, 1993, 11:30 local (19:30 UTC)
- Place: Fullerton, CA
- Location: 33.8720° N, 117.9798° W: Placed by OpenAirDocs at FULLERTON MUNI (FUL), within about a mile (OpenAirDocs)
- Nearby events: https://openairdocs.org/map.md?lat=33.8720&lon=-117.9798&mi=10
- Phase of flight: [Landing](https://openairdocs.org/ntsb-phases/550) (OpenAirDocs' grouping)
- Highest injury: No injuries
- Injuries: 1 uninjured
- Status: Completed, report November 15, 1993
- Report: Approved by Office Director
- NTSB case key (mKey): 27921
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=LAX93LA116
- NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/27921/pdf
- Page: https://openairdocs.org/ntsb/LAX93LA116

## Probable cause

THE PILOT'S FAILURE TO FOLLOW THE CHECKLIST.  A FACTOR RELATING TO THIS ACCIDENT WAS THE MISADJUSTMENT OF THE LANDING GEAR LOCKING MECHANISM WHICH CAUSED INTERMITTENT OPERATION.

## Sequence of events

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

- Gear not extended, landing - flare/touchdown
  - landing gear,gear locking mechanism - failure,partial (contributing factor)
  - checklist - not followed, pilot in command (cause)

## Analysis

THE AIRPLANE LANDED WITH THE RIGHT MAIN LANDING GEAR IN THE RETRACTED POSITION.  THE PILOT FAILED TO ASCERTAIN THAT ALL OF THE LANDING GEARS WERE FULLY EXTENDED BEFORE ATTEMPTING THE LANDING.  INSPECTION OF THE LANDING GEAR SYSTEM DISCLOSED THAT THE LANDING GEAR UPLOCK WAS NOT PROPERLY ADJUSTED AND THAT THE RIGHT MAIN LANDING GEAR WOULD INTERMITTENTLY FAIL TO EXTEND.  THE CESSNA SERVICE MANUAL REVEALS THAT THE LANDING GEAR LIGHT WILL NOT ILLUMINATE UNLESS ALL LANDING GEARS ARE IN THE EXTENDED AND LOCKED POSITION.

## Aircraft

- Registration: [N9668T](https://openairdocs.org/aircraft/N9668T), registered now, S/N 57468, built 1960 (OpenAirDocs)
- Reported make and model: CESSNA 210
- Registry model: [Cessna 210](https://openairdocs.org/model/cessna-210) (registry code 2073402) (OpenAirDocs)
- Registry engine: [Continental I0-470 series](https://openairdocs.org/engine/continental-i0-470-series) (registry code 17027, reciprocating) (OpenAirDocs)
- Category: Airplane
- Serial number: 57468
- Airframe hours: 2700
- Engines: CONTINENTAL IO-470-E 260 horsepower reciprocating
- Damage: Substantial damage
- Flight: Personal, Part 91
- Operator: Finn, Donald L.
- Registered owner: Finn, Donald L.
- Airworthiness certificate: Standard, Normal
- Last inspection: Annual, June 25, 1992, 50 hours before
- Departed: SMO, SANTA MONICA, CA
- Airport: FUL, Fullerton, runway 24, 3,121 × 75 ft, asphalt

## Flight crew

As NTSB recorded them. NTSB leaves out names.

- Pilot; age 40; airline transport; airplane ratings: multi-engine land, single-engine land; instrument ratings: airplane; medical: class 1, valid medical--w/ waivers/lim; seat: left; flight hours: 2,470 total, 100 in this make and model, 2,200 as pilot in command, 50 in the last 90 days, 20 in the last 30 days, 1 in the last 24 hours

## Weather

- Conditions: Visual (VMC), Day
- Wind: calm
- Visibility: 7 statute miles
- Lowest ceiling: none
- Temperature: 63 °F, dew point 46 °F
- Altimeter: 30.00 inHg
- Observed at: FUL, 1 nm away

## 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 19930212002409A](https://openairdocs.org/incident/19930212002409A), Feb 12, 1993: Cessna 210, Fullerton, CA, Substantial damage. Right main gear failed to extend for landing but extended on second try. Gear collapsed landing. Uplock adjustment.

## Other investigations on N9668T (1)

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.

- [NTSB UNK64X1604](https://openairdocs.org/ntsb/UNK64X1604), May 3, 1964: Cessna 210 (N9668T), Harsens Is, MI, substantial damage

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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