# NTSB ANC08CA121: Cessna 170, N2690V, Ruby, AK, September 9, 2008 - Type: NTSB accident investigation - Classification: Accident · No injuries · Data collection · Final report - Date: September 9, 2008, 13:15 local (21:15 UTC) - Place: Ruby, AK - Coordinates: 64, -155.833328 - Nearby events: https://openairdocs.org/map.md?lat=64.0000&lon=-155.8333&mi=10 - Phase of flight: [Maneuvering](https://openairdocs.org/ntsb-phases/450) (OpenAirDocs' grouping) - Defining event: [Maneuvering-low-alt flying: Loss of engine power (total)](https://openairdocs.org/ntsb-events/341) - Highest injury: No injuries - Injuries: 1 uninjured - Status: Completed, report December 11, 2008 - Report: Approved by Office Director - NTSB office: Alaska Regional Office - Lead agency: Other - Parties: FAA - NTSB case key (mKey): 69169 - NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=ANC08CA121 - NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/69169/pdf - Page: https://openairdocs.org/ntsb/ANC08CA121 ## Probable cause The pilot's failure to use carburetor heat, while operating at a reduced engine power while maneuvering in carburetor icing conditions. ## Findings NTSB's coded findings; those marked are part of the probable cause. - [Engine controls](https://openairdocs.org/ntsb-findings/01057600): Aircraft › Aircraft power plant · Not used/operated (probable cause); cases with it: [Cessna 170, 1 case](https://openairdocs.org/ntsb-findings/01057600/cases.md?model=2072302), [All aircraft, 51 cases](https://openairdocs.org/ntsb-findings/01057600/cases.md) - [Action: lack of action](https://openairdocs.org/ntsb-findings/02041030): Personnel issues › Action/decision · Pilot (probable cause); cases with it: [Cessna 170, 3 cases](https://openairdocs.org/ntsb-findings/02041030/cases.md?model=2072302), [All aircraft, 792 cases](https://openairdocs.org/ntsb-findings/02041030/cases.md) - [Temp/humidity/pressure: conducive to carburetor icing](https://openairdocs.org/ntsb-findings/03031030): Environmental issues › Conditions/weather/phenomena · Effect on equipment; cases with it: [Cessna 170, 1 case](https://openairdocs.org/ntsb-findings/03031030/cases.md?model=2072302), [All aircraft, 435 cases](https://openairdocs.org/ntsb-findings/03031030/cases.md) ## Sequence of events The events NTSB coded, in order, by phase of flight. The defining event best describes what happened. - [Maneuvering-low-alt flying: Fuel related](https://openairdocs.org/ntsb-events/190); cases with it: [Cessna 170, 1 case](https://openairdocs.org/ntsb-events/190/sequence.md?model=2072302), [All aircraft, 361 cases](https://openairdocs.org/ntsb-events/190/sequence.md) - [Maneuvering-low-alt flying: Loss of engine power (total)](https://openairdocs.org/ntsb-events/341) (defining event); cases with it: [Cessna 170, 3 cases](https://openairdocs.org/ntsb-events/341/sequence.md?model=2072302), [All aircraft, 3,820 cases](https://openairdocs.org/ntsb-events/341/sequence.md) - [Emergency descent: Off-field or emergency landing](https://openairdocs.org/ntsb-events/440); cases with it: [Cessna 170, 7 cases](https://openairdocs.org/ntsb-events/440/sequence.md?model=2072302), [All aircraft, 3,365 cases](https://openairdocs.org/ntsb-events/440/sequence.md) - [Emergency descent: Collision with terr/obj (non-CFIT) ](https://openairdocs.org/ntsb-events/470); cases with it: [Cessna 170, 15 cases](https://openairdocs.org/ntsb-events/470/sequence.md?model=2072302), [All aircraft, 10,189 cases](https://openairdocs.org/ntsb-events/470/sequence.md) ## Analysis The pilot was making a personal cross-country flight under Title 14, CFR Part 91. He said he was circling an off airport landing site at a reduced power setting, and when he applied throttle the engine quit. The pilot reported that during taxi for takeoff prior to the flight, the airplane's engine had carburetor ice, and he felt that this was what caused the engine to quit since he had not applied carburetor heat when he reduced power. The airplane made an emergency descent and impacted on muskeg. During the landing, the main landing gear attachments and left wing were damaged. The pilot indicated that there were no known mechanical problems with the airplane prior to the accident. ## Factual narrative The pilot was making a personal cross-country flight under Title 14, CFR Part 91. He said he was circling an off airport landing site at a reduced power setting, and when he applied throttle the engine quit. The pilot reported that during taxi for takeoff prior to the flight, the airplane's engine had carburetor ice, and he felt that this was what caused the engine to quit since he had not applied carburetor heat when he reduced power. The airplane made an emergency descent and impacted on muskeg. During the landing, the main landing gear attachments and left wing were damaged. The pilot indicated that there were no known mechanical problems with the airplane prior to the accident. ## Aircraft - Registration: [N2690V](https://openairdocs.org/deregistered/N2690V-2018-06-08), registration cancelled 2018-06-08, S/N 18200, built 1948 (OpenAirDocs) - Reported make and model: CESSNA 170 - Registry model: [Cessna 170](https://openairdocs.org/model/cessna-170) (registry code 2072302) (OpenAirDocs) - Registry engine: [Continental C145 series](https://openairdocs.org/engine/continental-c145-series) (registry code 17012, reciprocating) (OpenAirDocs) - Category: Airplane - Serial number: 18200 - Airframe hours: 2690 - Engines: CONT MOTOR C145 SERIES 145 horsepower reciprocating - Damage: Substantial damage - Flight: Personal, Part 91 - Operator: Zesiger Wendell H - Registered owner: Zesiger Wendell H - Airworthiness certificate: Standard, Normal - Last inspection: Annual, April 3, 2008 - Departed: North Pole, AK - Destination: Ruby, AK - Flight plan: Unknown ## Flight crew As NTSB recorded them. NTSB leaves out names. - Pilot; age 65; injuries: none; private; airplane ratings: single-engine land; medical: class 2, without waivers/limitations; last flight review March 26, 2008; seat: left; flight hours: 223 total, 25 in this make and model ## Weather - Conditions: Visual (VMC), Day - Wind: 90° at 5 knots - Visibility: 10 statute miles - Lowest ceiling: 10,000 ft overcast ## Other investigations on N2690V (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 ANC72DAH21](https://openairdocs.org/ntsb/ANC72DAH21), Jun 21, 1972: Cessna 170 (N2690V), Kenai, AK, substantial damage 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.