# NTSB ANC02LA074: Cessna U206F, N696TK, Koliganek, AK, July 12, 2002 - Type: NTSB accident investigation - Classification: Accident · No injuries · Limited investigation · Final report - Date: July 11, 2002, 17:00 local (Jul 12, 2002, 01:00 UTC) - Place: Koliganek, AK - Coordinates: 59.966667, -157.383331 - Nearby events: https://openairdocs.org/map.md?lat=59.9667&lon=-157.3833&mi=10 - Phase of flight: [Initial climb](https://openairdocs.org/ntsb-phases/350) (OpenAirDocs' grouping) - Highest injury: No injuries - Injuries: 4 uninjured - Status: Completed, report April 29, 2003 - Report: Approved by Office Director - NTSB office: Alaska Regional Office - Parties: FAA Anchorage FSDO-03 - NTSB case key (mKey): 55187 - NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=ANC02LA074 - NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/55187/pdf - NTSB docket: https://data.ntsb.gov/Docket?ProjectID=55187 - Page: https://openairdocs.org/ntsb/ANC02LA074 ## Probable cause The pilot's premature lift-off which precipitated an in-flight loss of control, and subsequent collision with terrain. ## Sequence of events In NTSB's coding before 2008 (https://www.ntsb.gov/GILS/Documents/codman.pdf). - Loss of control - in flight, takeoff - initial climb - lift-off - premature, pilot in command (cause) - climb - not attained, pilot in command - stall/mush - encountered, pilot in command - In flight collision with terrain/water, descent - uncontrolled - terrain condition - water ## Analysis The pilot reported that during takeoff on a sandbar, the airplane lifted off prematurely, failed to climb, and started to descend. Due to the shape of the sandbar, after the initial liftoff the airplane's flight path was partially over the river. As the airplane descended, its right main wheel entered the water, and the airplane nosed over. ## Factual narrative On July 11, 2002, about 1700 Alaska daylight time, a tundra tire-equipped Cessna U206F airplane, N696TK, sustained substantial damage when it collided with water during takeoff on from a sandbar in the Nushagak River, about 20 miles north of Koliganek, Alaska. The airplane was being operated by Tikchik Narrows Lodge, Inc., as a visual flight rules (VFR) business flight under Title 14, CFR Part 91, when the accident occurred. The commercial pilot and the three passengers were not injured. Visual meteorological conditions prevailed, and company flight following procedures were in effect. The flight's intended destination was the airstrip at the Tikchik Narrows Lodge, about 70 miles northwest of Koliganek. During a telephone conversation with the National Transportation Safety Board (NTSB) investigator-in-charge (IIC) on July 11, the owner of Tikchik Narrows Lodge said the pilot told him that during takeoff, the airplane lifted off the sandbar too soon. The pilot said the airplane stopped climbing and started to descend. He said due to the shape of the sandbar, the airplane was partially over the river when it started to descend, and its right main wheel entered the river. He said the airplane was pulled to the right into the river, and nosed over. The operator said there were no known mechanical anomalies with the airplane prior to the accident. The airplane sustained wing spar damage during the accident. ## Aircraft - Registration: [N696TK](https://openairdocs.org/deregistered/N696TK-2006-03-28), registration cancelled 2006-03-28, S/N U20601965, built 1965 (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: U206-01965 - Airframe hours: 10266 - Engines: Continental IO-520 300 horsepower reciprocating - Damage: Substantial damage - Flight: Business, Part 91 - Operator: Tikchik Narrows Lodge, Inc. - Registered owner: Tikchik Narrows Lodge, Inc. - Airworthiness certificate: Standard, Normal - Last inspection: 100 hour, July 4, 2002, 18 hours before - Departed: Koliganek, AK - Destination: Tikchik Lodge, AK - Flight plan: Company VFR ## Flight crew As NTSB recorded them. NTSB leaves out names. - Pilot; age 40; injuries: none; commercial; airplane ratings: single-engine sea, single-engine land; instrument ratings: airplane; medical: class 2, valid medical--no waivers/lim.; last flight review November 22, 2001; seat: left; flight hours: 1,086 total, 81 in this make and model, 1,086 as pilot in command, 84 in the last 90 days, 81 in the last 30 days, 4 in the last 24 hours ## Weather - Conditions: Visual (VMC), Day - Wind: calm - Visibility: 100 statute miles - Lowest ceiling: none - Temperature: 61 °F ## 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 20020711017379A](https://openairdocs.org/incident/20020711017379A), Jul 11, 2002: Cessna U206F, Koliganak, AK, No damage. (-23) On July 11, 2002, about 1930 Alaska daylight time, a tundra tire-equipped Cessna U206F airplane, N696TK, sustained substantial damage during takeoff on a… ## Docket (1 files) The files NTSB released with the investigation on February 6, 2003, on NTSB's docket system: https://data.ntsb.gov/Docket?ProjectID=55187. 724 KB in all. - Pilot/Operator Aircraft Accident Report, NTSB Form 6120.1 (item 1, .PDF, 724 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=40461465&FileExtension=.PDF&FileName=Pilot%2FOperator%20Aircraft%20Accident%20Report,%20NTSB%20Form%206120.1-Master.PDF 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.