# NTSB LAX83FA082: Cessna 401, N11JR, Lompoc, CA, January 26, 1983

- Type: NTSB accident investigation
- Classification: Accident · No injuries · Field investigation · Final report
- Date: January 26, 1983, 11:30 local (19:30 UTC)
- Place: Lompoc, CA
- Coordinates: 34.599201, -120.390159 (estimated)
- Nearby events: https://openairdocs.org/map.md?lat=34.5992&lon=-120.3902&mi=10
- Phase of flight: [Landing](https://openairdocs.org/ntsb-phases/550) (OpenAirDocs' grouping)
- Highest injury: No injuries
- Injuries: 5 uninjured
- Status: Completed
- Report: Approved by Office Director
- NTSB case key (mKey): 23417
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=LAX83FA082
- NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/23417/pdf
- Page: https://openairdocs.org/ntsb/LAX83FA082

## Sequence of events

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

- Main gear collapsed, landing - roll
  - landing gear,main gear attachment - overload (cause)
  - maintenance,major repair - improper, other maintenance personnel (cause)
  - lack of familiarity with aircraft, company maintenance personnel (cause)
  - maintenance,adjustment - improper, other maintenance personnel (cause)
  - lack of total experience in type of aircraft, company maintenance personnel (cause)
  - maintenance,100-hour inspection - improper, company maintenance personnel (cause)

## Analysis

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 WHEEL WELL AREA REVEALED THE LEFT STRUT BELLCRANK ATTACH FLANGE FORGING AND THE CONNECTING BOLT. P/N WAS 464P4-26 WERE FRACTURED. THE STRUT FORGING FAILED IN TENSILE OVERLOAD. THE CONNECTING BOLT FRACTURED BY TENSILE SHEAR.

## Aircraft

- Registration: [N11JR](https://openairdocs.org/deregistered/N11JR-2009-10-19), registration cancelled 2009-10-19, S/N 401-0052, built 1967 (OpenAirDocs)
- Reported make and model: CESSNA 401
- Registry model: [Cessna 401](https://openairdocs.org/model/cessna-401) (registry code 207590C) (OpenAirDocs)
- Registry engine: [Continental IO-520 series](https://openairdocs.org/engine/continental-io-520-series) (registry code 17032, reciprocating) (OpenAirDocs)
- Category: Airplane
- Serial number: 0052
- Airframe hours: 3761
- Engines: CONTINENTAL TSIO-520-E 300 horsepower reciprocating
- Damage: Substantial damage
- Flight: Part 135
- Registered owner: Aaa Air Charter, Inc.
- Airworthiness certificate: Standard, Normal
- Last inspection: 100 hour, January 8, 1983, 15 hours before
- Departed: SFO, SAN FRANCISCO, CA
- Flight plan: IFR
- Airport: LPC, Lompoc, runway 7, 3,600 × 100 ft, asphalt

## Flight crew

As NTSB recorded them. NTSB leaves out names.

- Pilot; age 59; 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: 15,339 total, 339 in this make and model, 15,029 as pilot in command, 134 in the last 90 days, 2 in the last 24 hours

## Weather

- Conditions: Visual (VMC), Day
- Wind: 120° at 15 knots, gusting 20
- Visibility: 10 statute miles
- Lowest ceiling: 4,000 ft overcast
- Temperature: -0 °F
- Altimeter: 29.00 inHg

## 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 19830126002249A](https://openairdocs.org/incident/19830126002249A), Jan 26, 1983: Cessna 401, Lompoc, CA, Substantial damage. Side drift while landing in a crosswind. Left main gear collapsed. Left strut bell crank forging and bolt failed.

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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