# NTSB SEA07LA026: Cessna 310B, N6640B, Lake Stevens, WA, December 6, 2006

- Type: NTSB accident investigation
- Classification: Accident · No injuries · Limited investigation · Final report
- Date: December 6, 2006, 11:50 local (19:50 UTC)
- Place: Lake Stevens, WA
- Coordinates: 48.110279, -122.062225
- Nearby events: https://openairdocs.org/map.md?lat=48.1103&lon=-122.0622&mi=10
- Phase of flight: [Taxi](https://openairdocs.org/ntsb-phases/250) (OpenAirDocs' grouping)
- Highest injury: No injuries
- Injuries: 2 uninjured
- Status: Completed, report April 25, 2007
- Report: Approved by Office Director
- Parties: FAA FSDO
- NTSB case key (mKey): 64967
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=SEA07LA026
- NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/64967/pdf
- Page: https://openairdocs.org/ntsb/SEA07LA026

## Probable cause

The collapse of the main landing gear for an undetermined reason while taxiing from landing.

## Sequence of events

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

- Gear collapsed, taxi - from landing
  - reason for occurrence undetermined (cause)
  - terrain condition - runway

## Analysis

The pilot said that while taxiing to his hangar, the left main landing gear collapsed, resulting in structural damage to the left outboard wing rib.  No determination was made as to why the landing gear collapsed.

## Factual narrative

On December 6, 2006, at approximately 1150 Pacific standard time, a Cessna 310B, N6640B, was substantially damaged when the left main landing gear collapsed during taxi at Frontier Airpark (WN53), Lake Stevens, Washington.  The commercial pilot and his passenger were not injured.  The owner/pilot was operating the airplane under Title 14 CFR Part 91.  Visual meteorological conditions prevailed for the cross-country flight which had departed Arlington, Washington, approximately 20 minutes before the accident.  No flight plan had been filed.

The pilot said that while taxiing to his hangar, the left main landing gear collapsed.  The airplane settled onto the left wing's tip tank.  The most outboard rib will need replacing, and the wing's upper skin was also wrinkled.  The airplane's landing gear had collapsed previously, approximately 6 months ago.  No determination was made as to why the landing gear collapsed on this occasion.

## Aircraft

- Registration: [N6640B](https://openairdocs.org/deregistered/N6640B-2008-10-14), registration cancelled 2008-10-14, S/N 35740, built 1958 (OpenAirDocs)
- Reported make and model: Cessna 310B
- Registry model: [Cessna 310B](https://openairdocs.org/model/cessna-310b) (registry code 2074208) (OpenAirDocs)
- Registry engine: [Continental O-470 series](https://openairdocs.org/engine/continental-o-470-series) (registry code 17026, reciprocating) (OpenAirDocs)
- Category: Airplane
- Serial number: 35740
- Airframe hours: 4557
- Engines: Continental O-470 240 hp reciprocating
- Damage: Substantial damage
- Flight: Personal, Part 91
- Registered owner: Gregg L. Ortega
- Airworthiness certificate: Standard, Normal
- Last inspection: Annual, June 1, 2006
- Departed: AWO, Arlington, WA
- Destination: WN53, Lake Stevens, WA
- Airport: WN53, Frontier Airpark

## Flight crew

As NTSB recorded them. NTSB leaves out names.

- Pilot; age 50; injuries: none; private, commercial; airplane ratings: single-engine land, multi-engine land, single-engine sea; instrument ratings: airplane; medical: class 2, with waivers/limitations; last flight review June 1, 2006; seat: left; flight hours: 1,455 total, 772 in this make and model, 1,204 as pilot in command, 7 in the last 90 days, 5 in the last 30 days, 1 in the last 24 hours

## Weather

- Conditions: Visual (VMC), Day
- Wind: 0° at 0 knots
- Visibility: 10 statute miles
- Lowest ceiling: none
- Temperature: 46 °F, dew point 43 °F
- Altimeter: 30.26 inHg
- Observed at: AWO, 5 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 20061206025969A](https://openairdocs.org/incident/20061206025969A), Dec 6, 2006: Cessna 310B, Lake Stevens, WA, Substantial damage. (-23) At approx 12:00 pm on 12-6-06 at Frontier Airpark, Lake Stevens WA, N6640B was taxiing to his home after landing and during a right turn from the left…

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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