# NTSB ANC05CA019: Cessna U206G, N9909Z, Illiamna, AK, December 24, 2004 - Type: NTSB accident investigation - Classification: Accident · No injuries · Data collection · Final report - Date: December 24, 2004, 11:40 local (15:40 UTC) - Place: Illiamna, AK - Coordinates: 59.753887, -154.911117 - Nearby events: https://openairdocs.org/map.md?lat=59.7539&lon=-154.9111&mi=10 - Phase of flight: [Taxi](https://openairdocs.org/ntsb-phases/250) (OpenAirDocs' grouping) - Highest injury: No injuries - Injuries: 1 uninjured - Status: Completed, report March 30, 2005 - Report: Approved by Office Director - NTSB office: Alaska Regional Office - NTSB case key (mKey): 60767 - NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=ANC05CA019 - NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/60767/pdf - Page: https://openairdocs.org/ntsb/ANC05CA019 ## Probable cause The pilot's inadequate compensation for the gusty wind conditions, which resulted in a loss of control, and the airplane nosing over. A factor contributing to the accident was the gusty wind condition. ## Sequence of events In NTSB's coding before 2008 (https://www.ntsb.gov/GILS/Documents/codman.pdf). - Loss of control - on ground/water, taxi - to takeoff - compensation for wind conditions - inadequate, pilot in command (cause) - weather condition - gusts (contributing factor) - Nose over, taxi - to takeoff ## Analysis The solo commercial pilot was taxiing for takeoff in gusty wind conditions. He said as he turned the airplane abeam the wind, a strong gust lifted the left wing, and rolled the airplane upside down. ## Factual narrative On December 24, 2004, about 1140 Alaska standard time, a wheel-equipped Cessna U206G airplane, N9909Z, sustained substantial damage when it nosed over on the taxiway while taxing for takeoff, at the Illiamna Airport, Illiamna, Alaska. The airplane was being operated by Lake Peninsula Air, of Port Alsworth, Alaska, as a visual flight rules (VFR) positioning flight under Title 14, CFR Part 91, when the accident occurred. The solo commercial pilot was not injured. Visual meteorological conditions prevailed, and company VFR flight following procedures were in effect. During a telephone conversation with the National Transportation Safety Board (NTSB) investigator-in-charge (IIC) on December 24, the owner of the airplane said the pilot told him he had dropped off a passenger, and was taxing for takeoff when a gust of wind from behind lifted the left wing and rolled the airplane over. During a telephone conversation with the IIC on December 24, an FAA flight service station specialist said that at the time of the accident, wind velocity instruments at the Illiamna Airport recorded a peak wind gust of 33 knots. ## Aircraft - Registration: [N9909Z](https://openairdocs.org/aircraft/N9909Z), registered now, S/N U20606740, built 1983 (OpenAirDocs) - Reported make and model: Cessna U206G - Registry model: [Cessna U206G](https://openairdocs.org/model/cessna-u206g) (registry code 2073356) (OpenAirDocs) - Registry engine: [Continental IO-520 series](https://openairdocs.org/engine/continental-io-520-series) (registry code 17032, reciprocating) (OpenAirDocs) - Category: Airplane - Serial number: U20606740 - Engines: Continental IO-520 reciprocating - Damage: Substantial damage - Flight: Positioning, Part 91 - Operator: David Wilder, doing business as Lake Penn Air - Registered owner: David Wilder - Airworthiness certificate: Standard, Utility; Standard, Normal - Departed: ILI, Illiamna, AK - Destination: AK51, Port Alsworth, AK - Flight plan: Company VFR - Airport: ILI, Illiamna, runway 35 ## Flight crew As NTSB recorded them. NTSB leaves out names. - Pilot; age 26; injuries: none; commercial; airplane ratings: single-engine land; instrument ratings: airplane; medical: class 2; flight hours: 1,580 total, 900 in this make and model, 90 in the last 90 days, 40 in the last 30 days ## Weather - Conditions: Visual (VMC), Day - Wind: 310° at 21 knots, gusting 32 ## 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 20041224034179A](https://openairdocs.org/incident/20041224034179A), Dec 24, 2004: Cessna U206G, Iliamna, AK, Substantial damage. (-23) On December 24, 2004, about 1125 Alaska standard time, a Cessna U206G airplane, N9909Z, sustained substantial damage during taxi. The airplane was being… ## Other investigations on N9909Z (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 ANC92LA057](https://openairdocs.org/ntsb/ANC92LA057), Apr 2, 1992: Cessna U206G (N9909Z), Kotzebue, AK, substantial damage. Probable cause: THE PILOT'S FAILURE TO REMOVE ALL THE FROST FROM THE AIRPLANE AND EXCEEDING THE GROSS WEIGHT LIMIT OF THE AIRPLANE. 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.