# NTSB ANC87IA011: Cessna 402C, N1233T, Kivalina, AK, October 8, 1986

- Type: NTSB incident investigation
- Classification: Incident · No injuries · Incident investigation · Final report
- Date: October 8, 1986, 12:05 local (20:05 UTC)
- Place: Kivalina, AK
- Location: 67.7362° N, 164.5108° W: Placed by OpenAirDocs: center of Kivalina, AK, within about 6 miles (OpenAirDocs)
- Nearby events: https://openairdocs.org/map.md?lat=67.7362&lon=-164.5108&mi=10
- Phase of flight: [Taxi](https://openairdocs.org/ntsb-phases/250) (OpenAirDocs' grouping)
- Highest injury: No injuries
- Injuries: 10 uninjured
- Status: Completed
- Report: Approved by Office Director
- NTSB office: Alaska Regional Office
- NTSB case key (mKey): 4793
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=ANC87IA011
- NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/4793/pdf
- Page: https://openairdocs.org/ntsb/ANC87IA011

## Sequence of events

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

- Main gear collapsed, taxi - to takeoff
  - landing gear,main gear attachment - disconnected (cause)
  - maintenance,inspection - inadequate, pilot in command (contributing factor)
  - maintenance,100-hour inspection - inadequate, company maintenance personnel (cause)

## Analysis

THE ROLL PIN AND SAFETY WIRE WHICH RETAIN THE MAIN LANDING GEAR FORWARD TRUNNION PIN WERE BROKEN AND THE FORWARD TRUNNION PIN ON THE RIGHT MAIN LANDING GEAR WAS FOUND 'BACKED OUT', THEREBY RELEASING THE RIGHT MAIN LANDING GEAR TRUNNION.

## Aircraft

- Registration: [N1233T](https://openairdocs.org/deregistered/N1233T-2007-03-19), registration cancelled 2007-03-19, S/N 402C0805, built 1984 (OpenAirDocs)
- Reported make and model: CESSNA 402C
- Registry model: [Cessna 402C](https://openairdocs.org/model/cessna-402c) (registry code 207590R) (OpenAirDocs)
- Registry engine: [Continental TSIO-520 series](https://openairdocs.org/engine/continental-tsio-520-series) (registry code 17040, reciprocating) (OpenAirDocs)
- Category: Airplane
- Serial number: 402C0805
- Airframe hours: 2760
- Engines: CONTINENTAL TSIO-520-VB 325 horsepower reciprocating
- Damage: Minor damage
- Flight: Part 135
- Registered owner: Ryan Air Service, Inc.
- Airworthiness certificate: Standard, Normal
- Destination: NOTAK, AK
- Flight plan: Company VFR
- Airport: Kivalina, runway 12, 3,000 ×  ft, snow

## Flight crew

As NTSB recorded them. NTSB leaves out names.

- Pilot; age 32; airline transport; airplane ratings: single-engine land, multi-engine land; instrument ratings: airplane; medical: class 1, valid medical--w/ waivers/lim; seat: left; flight hours: 6,142 total, 848 in this make and model, 3,650 as pilot in command, 212 in the last 90 days, 5 in the last 24 hours

## Weather

- Conditions: Visual (VMC), Day
- Wind: 90° at 7 knots
- Visibility: 20 statute miles
- Lowest ceiling: none
- Temperature: 16 °F, dew point -0 °F

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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