# NTSB ANC26LA001: Cessna 172N, N80628, Petersburg, AK, October 7, 2025 - Type: NTSB accident investigation - Classification: Accident · No injuries · Class 3 · Limited · Preliminary report - Date: October 7, 2025, 14:56 local (22:56 UTC) - Place: Petersburg, AK - Coordinates: 56.923233, -133.30215 - Nearby events: https://openairdocs.org/map.md?lat=56.9232&lon=-133.3022&mi=10 - Phase of flight: [Enroute](https://openairdocs.org/ntsb-phases/400) (OpenAirDocs' grouping) - Defining event: [Enroute: Loss of engine power (total)](https://openairdocs.org/ntsb-events/341) - Highest injury: No injuries - Injuries: 2 uninjured - Status: Investigation ongoing - Investigation class: Class 3 - NTSB office: Alaska Regional Office - Parties: FAA/FSDO - SAIBs cited in the narratives: [SAIB CE-09-35](https://openairdocs.org/saib/CE-09-35) (OpenAirDocs) - NTSB case key (mKey): 201826 - NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=ANC26LA001 - NTSB preliminary report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/201826/pdf - Page: https://openairdocs.org/ntsb/ANC26LA001 ## Preliminary report On October 7, 2025, at 1456 Alaska daylight time, a Cessna 172 airplane, N80628, was substantially damaged when it was involved in an accident near Petersburg, Alaska. The student pilot and flight instructor were not injured. The airplane was operated as a Title 14 Code of Federal Regulations Part 91 flight. The student pilot purchased the airplane two weeks prior to the accident. The training flight included steep turns, turns around a point, and emergency procedures. The flight instructor stated that during the flight there was some mist in the area, so they had applied carburetor heat and left it on. After rolling out of a left turn, while in straight and level flight, the engine lost partial power. Engine power was briefly restored, then the engine lost all power. In an attempt to restore engine power, the flight instructor and student pilot cycled the magnetos, turned on the electric fuel pump, ensured the fuel selector was in the BOTH position, and the mixture was full RICH. Unable to restart the engine, the flight instructor performed a forced landing to a road. During the landing roll the airplane struck a large rock that partially separated the right main landing gear, and it pivoted it into a ditch. The airplane came to rest inverted and sustained substantial damage to the right wing. At 1456, the weather reported at Petersburg Airport (PAPG), about 14 miles southeast of the accident site, included a temperature of 9°C and a dew point of 7°C. The calculated relative humidity at this temperature and dewpoint was 87%. Review of the icing probability chart contained within Federal Aviation Administration Special Airworthiness Information Bulletin CE-09-35 revealed the atmospheric conditions at the time of the accident were “serious icing at cruise power settings, and also fell within the range specified for icing in pressure-type carburetors.” A detailed examination is pending recovery of the airplane. ## Sequence of events The events NTSB coded, in order, by phase of flight. The defining event best describes what happened. - [Enroute: Loss of engine power (total)](https://openairdocs.org/ntsb-events/341) (defining event); cases with it: [Cessna 172N, 28 cases](https://openairdocs.org/ntsb-events/341/sequence.md?model=2072434), [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 172N, 31 cases](https://openairdocs.org/ntsb-events/440/sequence.md?model=2072434), [All aircraft, 3,365 cases](https://openairdocs.org/ntsb-events/440/sequence.md) - [Landing-landing roll: Collision with terr/obj (non-CFIT) ](https://openairdocs.org/ntsb-events/470); cases with it: [Cessna 172N, 134 cases](https://openairdocs.org/ntsb-events/470/sequence.md?model=2072434), [All aircraft, 10,189 cases](https://openairdocs.org/ntsb-events/470/sequence.md) - [Landing-landing roll: Nose over/nose down](https://openairdocs.org/ntsb-events/096); cases with it: [Cessna 172N, 44 cases](https://openairdocs.org/ntsb-events/096/sequence.md?model=2072434), [All aircraft, 2,287 cases](https://openairdocs.org/ntsb-events/096/sequence.md) ## Aircraft - Registration: [N80628](https://openairdocs.org/aircraft/N80628), registered now, S/N 17269062 (OpenAirDocs) - Reported make and model: CESSNA 172N - Registry model: [Cessna 172N](https://openairdocs.org/model/cessna-172n) (registry code 2072434) (OpenAirDocs) - Category: Airplane - Serial number: 17269062 - Damage: Substantial damage - Flight: Instructional, Part 91 - Departed: PAPG, Petersburg, AK ## Weather - Conditions: Visual (VMC), Day - Wind: 50° at 3 knots - Visibility: 10 statute miles - Lowest ceiling: 4,400 ft broken - Temperature: 48 °F, dew point 45 °F - Altimeter: 30.04 inHg - Observed at: PAPG, 14 nm away - METAR: PAPG 072256Z 05003KT 10SM -RA SCT018 BKN044 09/07 A3004 RMK AO2 RAB46 SLP176 P0000 T00890067 ## 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 20251007017579A](https://openairdocs.org/incident/20251007017579A), Oct 7, 2025: Cessna 172N, Petersburg, AK, Substantial damage. During a 45-degree steep turn to the left to remain clear of clouds. Due to temp/ dew spread and visible moisture (I.e. light rain), carburetor heat was on… 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.