# NTSB SEA05LA036: Cessna U206F, N8313Q, Prevost, WA, January 14, 2005 - Type: NTSB accident investigation - Classification: Accident · No injuries · Limited investigation · Final report - Date: January 14, 2005, 10:00 local (18:00 UTC) - Place: Prevost, WA - Coordinates: 48.674446, -123.178611 - Nearby events: https://openairdocs.org/map.md?lat=48.6744&lon=-123.1786&mi=10 - Phase of flight: [Landing](https://openairdocs.org/ntsb-phases/550) (OpenAirDocs' grouping) - Highest injury: No injuries - Injuries: 3 uninjured - Status: Completed, report July 7, 2005 - Report: Approved by Office Director - Parties: Seattle, WA - NTSB case key (mKey): 60871 - NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=SEA05LA036 - NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/60871/pdf - Page: https://openairdocs.org/ntsb/SEA05LA036 ## Probable cause The pilot not identifying unsafe landing conditions, and his subsequent intentional swerve during the landing roll resulting in impacting a ditch. Contributing factors were the ice/frost on the grass/dirt one-way runway (1,560 feet in length), the unexpected tail wind gust, and the ditch he encountered after he swerved to avoid going past the end of the runway into trees. ## Sequence of events In NTSB's coding before 2008 (https://www.ntsb.gov/GILS/Documents/codman.pdf). - On ground/water encounter with terrain/water, landing - roll - unsafe/hazardous condition - not identified, pilot in command (cause) - airport facilities,runway/landing area condition - icy (contributing factor) - ground loop/swerve - intentional, pilot in command (cause) - weather condition - gusts (contributing factor) - terrain condition - ditch (contributing factor) ## Analysis The pilot did a "fly-over" to check out the runway conditions including wind direction and speed. He said that the runway was clear of snow, and there was no indication of ice or frost. The pilot said that the winds in the nearby bay appeared to be 10 knots or less. He said that immediately after touchdown the airplane felt like it had no traction; braking action was poor to none. He said that after several hundred feet of ground roll, he felt a "strong" gust of wind on his tail. The pilot said that he decided to swerve north of the runway rather than impact the trees on the end of the runway. He impacted a soft mound of dirt which was not initially visible, "thus causing the airplane to slowly nose over." The airplane's left strut was broken, the left wing was bent aft, the engine firewall and chin were crushed, and the aft fuselage was crushed and bent. ## Factual narrative On January 14, 2005, at approximately 1000 Pacific standard time, a Cessna U206F, N8313Q, was substantially damaged when it veered off the grass/dirt runway, impacted a mound of dirt, and nosed over while landing at Stuart Island West Airpark (2WA3; elevation 200 feet), Prevost, Washington. The pilot and his two passengers were not injured. West Isle Air was operating the airplane under Title 14 CFR Part 135. Visual meteorological conditions prevailed for the cross-country flight that originated at approximately 0945 from Anacortes, Washington. A company VFR flight plan had been filed. The pilot did a "fly-over" to check out the runway conditions including wind direction and speed. He said that the runway was clear of snow, and there was no indication of ice or frost. The pilot said that the winds in the nearby bay appeared to be 10 knots or less. He said that immediately after touchdown the airplane felt like it had no traction; braking action was poor to none. He said that after several hundred feet of ground roll, he felt a "strong" gust of wind on his tail. The pilot said that he decided to swerve north of the runway rather than impact the trees on the end of the runway. He impacted a soft mound of dirt which was not initially visible, "thus causing the airplane to slowly nose over." The airplane's left strut was broken, the left wing was bent aft, the engine firewall and chin were crushed, and the aft fuselage was crushed and bent. ## Aircraft - Registration: [N8313Q](https://openairdocs.org/deregistered/N8313Q-2005-06-21), registration cancelled 2005-06-21, S/N U20603174, built 1976 (OpenAirDocs) - Reported make and model: Cessna U206F - Registry model: [Cessna U206F](https://openairdocs.org/model/cessna-u206f) (registry code 2073333) (OpenAirDocs) - Registry engine: [Continental IO-520 series](https://openairdocs.org/engine/continental-io-520-series) (registry code 17032, reciprocating) (OpenAirDocs) - Category: Airplane - Serial number: U20603174 - Airframe hours: 14469 - Engines: Continental IO-520-F 300 horsepower reciprocating - Damage: Substantial damage - Flight: Part 135 - Operator: West Isle Air, doing business as San Juan Airlines - Registered owner: Clyde E. Carlson - Airworthiness certificate: Standard, Normal - Last inspection: Annual, November 26, 2004, 94 hours before - Departed: 74S, Anacortes, WA - Destination: 2WA3, Prevost, WA - Flight plan: Company VFR - Airport: 2WA3, Stuart Island West Airport, runway 270, 1,560 × 50 ft, grass/turf ## Flight crew As NTSB recorded them. NTSB leaves out names. - Pilot; age 25; injuries: none; flight instructor, commercial; airplane ratings: multi-engine land, single-engine land, single-engine sea; instrument ratings: airplane; medical: class 2, with waivers/limitations; last flight review May 20, 2004; seat: left; flight hours: 1,200 total, 212 in this make and model, 1,125 as pilot in command, 174 in the last 90 days, 54 in the last 30 days, 1 in the last 24 hours ## Weather - Conditions: Visual (VMC), Day - Wind: 30° at 10 knots - Visibility: 30 statute miles - Lowest ceiling: 25,000 ft broken - Temperature: 28 °F, dew point 14 °F - Altimeter: 30.53 inHg - Observed at: YYJ, 10 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 20050114000469A](https://openairdocs.org/incident/20050114000469A), Jan 14, 2005: Cessna U206F, Friday Harbor, WA, Destroyed. (-23) After touchdown, the aircraft began to slide on ice, and in an attempt to stop before reaching the end of the runway, the pilot steered the aircraft into… ## Other investigations on N8313Q (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 SEA96LA177](https://openairdocs.org/ntsb/SEA96LA177), Aug 5, 1996: Cessna U206F (N8313Q), Crane Island, WA, substantial damage. Probable cause: the pilot's failure to correctly judge the surface winds in the vicinity of the runway. Factors relating to the accident were: a tailwind during landing, a short runway with a wet surface, and an… 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. --- OpenAirDocs.org is an independent research project of [Contrail Labs](https://contraillabs.com/). It is not affiliated with the FAA or the NTSB. Source documents are U.S. government works in the public domain.