# NTSB SEA89FA155: Cessna 402B, Seattle, WA, August 31, 1989

- Type: NTSB accident investigation
- Classification: Accident · No injuries · Field investigation · Final report
- Date: August 30, 1989, 18:19 local (Aug 31, 1989, 01:19 UTC)
- Place: Seattle, WA
- Coordinates: 47.439266, -122.310943 (estimated)
- Nearby events: https://openairdocs.org/map.md?lat=47.4393&lon=-122.3109&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 25, 1992
- Report: Approved by Office Director
- NTSB case key (mKey): 40931
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=SEA89FA155
- NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/40931/pdf
- Page: https://openairdocs.org/ntsb/SEA89FA155

## Probable cause

THE LANDING GEAR DOWN LOCK MECHANISM FAILURE.

## 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 locking mechanism - failure,total (cause)
- Fire, landing - roll

## Analysis

AT THE END OF THE FLIGHT DURING THE LANDING ROLL, THE LEFT MAIN LANDING GEAR COLLAPSED. THE AIRPLANE SKIDDED DOWN THE RUNWAY AND CAME TO REST JUST OFF THE RUNWAY EDGE. THE LEFT MAIN FUEL TANK RUPTURED AND IGNITED THE FUEL. UPON INSPECTION OF THE GEAR MECHANISM IT WAS FOUND THAT THE DOWN LOCK LINK BROKE IN THE THREADED AREA.

## Aircraft

- Registration: CGRKR (not matched to a registry record)
- Reported make and model: CESSNA 402B
- Category: Airplane
- Serial number: 402B1354
- Airframe hours: 5864
- Engines: CONTINENTAL TSIO-520E 300 horsepower reciprocating
- Damage: Substantial damage
- Fire: On-Ground
- Flight: Part 129
- Registered owner: Aztec Aviation Consulting,Ltd
- Airworthiness certificate: Standard, Normal
- Last inspection: AAIP, August 20, 1989, 6 hours before
- Departed: YUR, VANCOUVER, OF
- Flight plan: VFR
- Airport: SEA, Seattle-Tacoma Intl, runway 16R, 9,425 × 150 ft, concrete

## Flight crew

As NTSB recorded them. NTSB leaves out names.

- Pilot; age 22; commercial; airplane ratings: multi-engine land; instrument ratings: airplane; medical: class 1, valid medical--no waivers/lim.; seat: left; flight hours: 390 total, 17 in this make and model, 234 as pilot in command, 95 in the last 90 days, 50 in the last 30 days, 2 in the last 24 hours

## Weather

- Conditions: Visual (VMC), Night/bright
- Wind: 210° at 10 knots
- Visibility: 15 statute miles
- Lowest ceiling: none
- Temperature: 64 °F, dew point 52 °F
- Altimeter: 29.00 inHg
- Observed at: SEA

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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