# NTSB ANC95LA164: Cessna 180A, N94259, Glennallen, AK, September 10, 1995 - Type: NTSB accident investigation - Classification: Accident · No injuries · Limited investigation · Final report - Date: September 10, 1995, 10:00 local (18:00 UTC) - Place: Glennallen, AK - Coordinates: 62.100669, -145.530014 (estimated) - Nearby events: https://openairdocs.org/map.md?lat=62.1007&lon=-145.5300&mi=10 - Phase of flight: [Takeoff](https://openairdocs.org/ntsb-phases/300) (OpenAirDocs' grouping) - Highest injury: No injuries - Injuries: 1 uninjured - Status: Completed, report April 18, 1996 - Report: Approved by Office Director - NTSB office: Alaska Regional Office - NTSB case key (mKey): 2737 - NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=ANC95LA164 - NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/2737/pdf - Page: https://openairdocs.org/ntsb/ANC95LA164 ## Probable cause The pilot's selection of an unsuitable area for takeoff. The water condition with large waves/swells was a related factor. ## Sequence of events In NTSB's coding before 2008 (https://www.ntsb.gov/GILS/Documents/codman.pdf). - On ground/water encounter with terrain/water, takeoff - roll/run - weather condition - high wind - terrain condition - large wave/swell (contributing factor) - unsuitable terrain or takeoff/landing/taxi area - selected, pilot in command (cause) - landing gear,float assembly - overload - lift-off - aborted, pilot in command - landing gear,float assembly - leak - Nose over, taxi ## Analysis The pilot of a float equipped Cessna 180A, N94259, was departing a remote lake after deplaning 2 hunters. Windy conditions from a nearby glacier produced choppy waves of about 3 to 4 feet high. The wind was estimated to be about 30 knots. During the takeoff run, the airplane floats received several hard impacts from the waves that were washing over the top of the floats. The pilot aborted the takeoff and taxied on the lake, looking for calmer conditions. The left float began to fill with water and the airplane rolled over. The airplane did not sink at that time. The pilot exited the airplane and climbed onto the inverted airplane floats. Later, the pilot of a Bell 206B, N84TA, attempted to rescue the Cessna pilot. While hovering near the downed plane, the helicopter went into a dynamic rollover and crashed, and the Cessna pilot received serious injuries. The Cessna 180 sank after the rescue. (See: ID ANC95TA166 for information concerning the helicopter accident.) ## Factual narrative On September 10, 1995, about 1000 Alaska daylight time, a float equipped Cessna 180A, N94259, sank after an aborted takeoff from Tazlina Lake, about 20 miles southwest of Glennallen, Alaska. The airplane was being operated as a visual flight rules (VFR) positioning flight under Title 14 CFR Part 91 when the accident occurred. The airplane, operated by Alaska Air Ventures, Glennallen, was destroyed. The certificated commercial pilot, the sole occupant, was not injured when the airplane inverted. Visual meteorological conditions prevailed. Company flight following procedures were in effect. The flight originated from Snowshoe Lake, about 38 miles west of Glennallen, about 0830. The operator reported that he landed on Tazlina Lake to drop off 2 hunters. The lake is fed from glacier melt water from the Tazlina glacier. Windy conditions from the glacier produced choppy waves of about 3 to 4 feet high. After dropping the hunters, the pilot taxied out on to the lake for departure. During the takeoff run, the airplane floats received several hard impacts from the waves that were washing over the top of the floats. The pilot aborted the takeoff and water taxied on the lake, looking for calmer conditions. The left float began to fill with water and the airplane rolled over. The airplane did not sink at that time. The pilot exited the airplane and climbed onto the inverted airplane floats. About 1400, the floating airplane was spotted by a passing float equipped airplane that landed to lend assistance. The pilot had developed syptoms of hypothermia. The pilot was unable to retrieve a rope from the other airplane but did manage to grab a sleeping bag. The second airplane departed to radio for more assistance. About 1545, the pilot received serious injuries during a rescue attempt and subsequent crash of a helicopter that came to the pilot's aid. The airplane sank after the rescue. The second accident is ANC-95-T-A166. The pilot did not return a pilot/operator report (NTSB form 6120.1/2) to the investigator-in-charge. ## Aircraft - Registration: [N94259](https://openairdocs.org/deregistered/N94259-2015-04-30), registration cancelled 2015-04-30, S/N 50032, built 1957 (OpenAirDocs) - Reported make and model: CESSNA 180A - Registry model: [Cessna 180A](https://openairdocs.org/model/cessna-180a) (registry code 2072604) (OpenAirDocs) - Registry engine: [Continental O-470 series](https://openairdocs.org/engine/continental-o-470-series) (registry code 17026, reciprocating) (OpenAirDocs) - Category: Airplane - Serial number: 50032 - Engines: CONTINENTAL O-470-K 230 horsepower reciprocating - Damage: Destroyed - Flight: Positioning, Part 91 - Registered owner: Airventure Associates Inc. - Airworthiness certificate: Standard, Normal - Flight plan: Company VFR ## Flight crew As NTSB recorded them. NTSB leaves out names. - Pilot; age 67; private, commercial; airplane ratings: single-engine land, single-engine sea, multi-engine land; instrument ratings: airplane; medical: class 2, valid medical--w/ waivers/lim; seat: left; flight hours: 29,500 total ## Weather - Conditions: Visual (VMC), Day - Wind: 180° at 30 knots - Visibility: 30 statute miles - Lowest ceiling: 5,500 ft broken - Temperature: 50 °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 19950910028309A](https://openairdocs.org/incident/19950910028309A), Sep 10, 1995: Cessna 180A, Glennallen, AK, Destroyed. Tried depart choppy lake. Impacts caused a float to fill with water. Rolled over. Injured on rescue. Plane sank. 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.