# NTSB ANC24LA053: Cessna 170B, N2839C, Tok, AK, June 24, 2024 - Type: NTSB accident investigation - Classification: Accident · No injuries · Class 4 · Limited · Final report - Date: June 23, 2024, 18:47 local (Jun 24, 2024, 02:47 UTC) - Place: Tok, AK - Coordinates: 63.33, -142.954 - Nearby events: https://openairdocs.org/map.md?lat=63.3300&lon=-142.9540&mi=10 - Phase of flight: [Landing](https://openairdocs.org/ntsb-phases/550) (OpenAirDocs' grouping) - Defining event: [Landing-landing roll: Loss of control on ground](https://openairdocs.org/ntsb-events/230) - Highest injury: No injuries - Injuries: 1 uninjured - Status: Completed - Report: Approved by Office Director - Investigation class: Class 4 - Basic report with no Prelim publish - NTSB office: Alaska Regional Office - Parties: FAA FSDO - Fairbanks - NTSB case key (mKey): 194525 - NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=ANC24LA053 - NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/194525/pdf - NTSB docket: https://data.ntsb.gov/Docket?ProjectID=194525 - Page: https://openairdocs.org/ntsb/ANC24LA053 ## Probable cause The pilot’s failure to maintain directional control of the airplane during the landing roll. ## Findings NTSB's coded findings; those marked are part of the probable cause. - [Performance/control parameters: directional control](https://openairdocs.org/ntsb-findings/01062020): Aircraft › Aircraft oper/perf/capability · Not attained/maintained (probable cause); cases with it: [Cessna 170B, 74 cases](https://openairdocs.org/ntsb-findings/01062020/cases.md?model=2072306), [All aircraft, 3,958 cases](https://openairdocs.org/ntsb-findings/01062020/cases.md) - [Use of equip/info: aircraft control](https://openairdocs.org/ntsb-findings/02063040): Personnel issues › Task performance · Pilot (probable cause); cases with it: [Cessna 170B, 91 cases](https://openairdocs.org/ntsb-findings/02063040/cases.md?model=2072306), [All aircraft, 9,295 cases](https://openairdocs.org/ntsb-findings/02063040/cases.md) ## Sequence of events The events NTSB coded, in order, by phase of flight. The defining event best describes what happened. - [Landing-landing roll: Loss of control on ground](https://openairdocs.org/ntsb-events/230) (defining event); cases with it: [Cessna 170B, 84 cases](https://openairdocs.org/ntsb-events/230/sequence.md?model=2072306), [All aircraft, 4,585 cases](https://openairdocs.org/ntsb-events/230/sequence.md) ## Analysis The pilot reported that, during the landing roll in a tailwheel-equipped airplane, he lost directional control which resulted in a ground loop. During the ground loop, the airplane’s left wing impacted the runway surface which resulted in substantial damage to the left wing and left aileron. The pilot reported that there were no preaccident mechanical failures or malfunctions with the airplane that would have precluded normal operation. ## Aircraft - Registration: [N2839C](https://openairdocs.org/aircraft/N2839C), registered now, S/N 26382, built 1954 (OpenAirDocs) - Reported make and model: CESSNA 170B - Registry model: [Cessna 170B](https://openairdocs.org/model/cessna-170b) (registry code 2072306) (OpenAirDocs) - Registry engine: [Continental C145 series](https://openairdocs.org/engine/continental-c145-series) (registry code 17012, reciprocating) (OpenAirDocs) - Category: Airplane - Serial number: 26382 - Year built: 1954 - Airframe hours: 2667.72 - Engines: Lycoming O-360-A1A 180 horsepower reciprocating - Damage: Substantial damage - Flight: Personal, Part 91 - Airworthiness certificate: Standard, Normal - Last inspection: Annual, June 12, 2023, 44.62 hours before - Departed: 25AA, Fairbanks, AK - Destination: Same as departure - Airport: PFTO, Tok Junction, runway 26, 2,509 × 40 ft, gravel - Equipment: Handheld GPS, Electronic flight bag or handheld device, Stall warning system ## Flight crew As NTSB recorded them. NTSB leaves out names. - Pilot; age 46; injuries: none; private; airplane ratings: single-engine land; medical: class 3, with waivers/limitations; last flight review July 20, 2023; seat: left; restraint: 4-point; flight hours: 185 total, 88 in this make and model, 106 as pilot in command, 49 in the last 90 days, 32 in the last 30 days, 2 in the last 24 hours ## Weather - Conditions: Visual (VMC), Day - Wind: 50° at 8 knots - Visibility: 10 statute miles - Temperature: 75 °F, dew point 32 °F - Altimeter: 29.77 inHg - Observed at: ABI, 84 nm away - METAR: PABI 240153Z 05008KT 10SM FEW050 FEW100 SCT200 24/00 A2977 RMK AO2 SLP077 T02440000 $ ## 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 20240623006299A](https://openairdocs.org/incident/20240623006299A), Jun 23, 2024: Cessna 170B, Tok, AK, Substantial damage. After landing and during rollout, the pilot experienced crosswinds prompting rudder correction, during correction the pilot lost control causing a groundloop… ## Docket (2 files) The files NTSB released with the investigation on March 28, 2025, on NTSB's docket system: https://data.ntsb.gov/Docket?ProjectID=194525. 4.6 MB in all. - Pilot/operator aircraft accident report, NTSB form 6120.1 (item 1, PDF, 11 pages, 3.2 MB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=17328630&FileExtension=pdf&FileName=6120_Redacted-Rel.pdf - Photos (item 2, PDF, 3 pages, 1.4 MB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=17328803&FileExtension=pdf&FileName=photo%20array-Rel.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.