# NTSB SEA08CA171: de Havilland Beaver DHC-2 MK.1, N53BV, Kenmore, WA, August 4, 2008 - Type: NTSB accident investigation - Classification: Accident · No injuries · Data collection · Final report - Date: August 4, 2008, 15:30 local (22:30 UTC) - Place: Kenmore, WA - Coordinates: 47.75111, -122.269165 - Nearby events: https://openairdocs.org/map.md?lat=47.7511&lon=-122.2692&mi=10 - Phase of flight: [Taxi](https://openairdocs.org/ntsb-phases/250) (OpenAirDocs' grouping) - Defining event: [Taxi-from runway: Loss of control on ground](https://openairdocs.org/ntsb-events/230) - Highest injury: No injuries - Injuries: 2 uninjured - Status: Completed, report August 28, 2008 - Report: Approved by Office Director - NTSB case key (mKey): 68627 - NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=SEA08CA171 - NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/68627/pdf - Page: https://openairdocs.org/ntsb/SEA08CA171 ## Probable cause The pilot's failure to maintain aircraft control while water taxiing. Contributing to the accident were the pilot's failure to compensate for the wind condition and a tailwind. ## Findings NTSB's coded findings; those marked are part of the probable cause. - [Wind: tailwind](https://openairdocs.org/ntsb-findings/03034015): Environmental issues › Conditions/weather/phenomena · Contributed to outcome (probable cause); cases with it: [Dehavilland BEAVER DHC-2 MK.1, 1 case](https://openairdocs.org/ntsb-findings/03034015/cases.md?model=2800102), [All aircraft, 594 cases](https://openairdocs.org/ntsb-findings/03034015/cases.md) - [Use of equip/info: aircraft control](https://openairdocs.org/ntsb-findings/02063040): Personnel issues › Task performance · Pilot (probable cause); cases with it: [Dehavilland BEAVER DHC-2 MK.1, 9 cases](https://openairdocs.org/ntsb-findings/02063040/cases.md?model=2800102), [All aircraft, 9,295 cases](https://openairdocs.org/ntsb-findings/02063040/cases.md) - [Performance/control parameters: crosswind correction](https://openairdocs.org/ntsb-findings/01062030): Aircraft › Aircraft oper/perf/capability · Not attained/maintained (probable cause); cases with it: [Dehavilland BEAVER DHC-2 MK.1, 2 cases](https://openairdocs.org/ntsb-findings/01062030/cases.md?model=2800102), [All aircraft, 184 cases](https://openairdocs.org/ntsb-findings/01062030/cases.md) - [Terrain: water](https://openairdocs.org/ntsb-findings/03021020): Environmental issues › Physical environment · Not specified; cases with it: [Dehavilland BEAVER DHC-2 MK.1, 1 case](https://openairdocs.org/ntsb-findings/03021020/cases.md?model=2800102), [All aircraft, 97 cases](https://openairdocs.org/ntsb-findings/03021020/cases.md) ## Sequence of events The events NTSB coded, in order, by phase of flight. The defining event best describes what happened. - [Taxi-from runway: Loss of control on ground](https://openairdocs.org/ntsb-events/230) (defining event); cases with it: [Dehavilland BEAVER DHC-2 MK.1, 6 cases](https://openairdocs.org/ntsb-events/230/sequence.md?model=2800102), [All aircraft, 4,585 cases](https://openairdocs.org/ntsb-events/230/sequence.md) - [Taxi-from runway: Collision with terr/obj (non-CFIT) ](https://openairdocs.org/ntsb-events/470); cases with it: [Dehavilland BEAVER DHC-2 MK.1, 9 cases](https://openairdocs.org/ntsb-events/470/sequence.md?model=2800102), [All aircraft, 10,189 cases](https://openairdocs.org/ntsb-events/470/sequence.md) ## Analysis The pilot reported that after landing the float-equipped airplane in the water, and while on the step with a 7 to 10 knot, 45 to 50 degree left crosswind, the wind "sheared" to a [left] quartering tailwind. After veering to the left the pilot applied "strong" right rudder to counter the left yaw. The airplane's right wing tip subsequently struck the water, which resulted in substantial damage to the right wing and right aileron. ## Factual narrative The pilot reported that after landing the float-equipped airplane in the water, and while on the step with a 7 to 10 knot, 45 to 50 degree left crosswind, the wind "sheared" to a [left] quartering tailwind. After veering to the left the pilot applied "strong" right rudder to counter the left yaw. The airplane's right wing tip subsequently struck the water, which resulted in substantial damage to the right wing and right aileron. ## Aircraft - Registration: [N53BV](https://openairdocs.org/aircraft/N53BV), registered now, S/N 52-6119 (OpenAirDocs) - Reported make and model: de Havilland Beaver DHC-2 MK.1 - Registry model: [Dehavilland BEAVER DHC-2 MK.1](https://openairdocs.org/model/dehavilland-beaver-dhc-2-mk-1) (registry code 2800102) (OpenAirDocs) - Registry engine: [Pratt & Whitney R-985 series](https://openairdocs.org/engine/pratt-whitney-r-985-series) (registry code 52008, reciprocating) (OpenAirDocs) - Category: Airplane - Serial number: 52-6119 - Engines: Pratt & Whitney R-985 reciprocating - Damage: Substantial damage - Flight: Personal, Part 91 - Operator: Richard P Emerson - Registered owner: Pendril Sound LLC - Airworthiness certificate: Standard, Normal - Departed: S60, Kenmore, WA - Destination: S60, Kenmore, WA - Airport: S60, Kenmore Air Harbor Inc SPB, runway 36 ## Flight crew As NTSB recorded them. NTSB leaves out names. - Pilot; age 46; private; airplane ratings: single-engine land, multi-engine land; instrument ratings: airplane; medical: class 3; flight hours: 412 total, 108 in this make and model, 47 in the last 90 days, 38 in the last 30 days ## Weather - Conditions: Visual (VMC), Day - Wind: variable at 10 knots ## 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 20080804845639A](https://openairdocs.org/incident/20080804845639A), Aug 4, 2008: Dhav DHC2MK1, Kenmore, WA, Substantial damage. (-23) Aircraft was practicing crosswind landings on lake Washington in the vicinity of Kenmore air Harbor (S60) and incountered a quartering tailwind during… 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.