# NTSB ANC20CA022: Cessna 182, N969KM, Koyuk, AK, February 20, 2020 - Type: NTSB accident investigation - Classification: Accident · No injuries · Class 4 · Data collection · Final report - Date: February 19, 2020, 15:00 local (Feb 20, 2020, 00:00 UTC) - Place: Koyuk, AK - Coordinates: 64.751663, -161.6011 (estimated) - Nearby events: https://openairdocs.org/map.md?lat=64.7517&lon=-161.6011&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: 2 uninjured - Status: Completed - Report: Approved by Office Director - Investigation class: Class 4 - Basic report with no Prelim publish - NTSB office: Alaska Regional Office - NTSB case key (mKey): 100972 - NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=ANC20CA022 - NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/100972/pdf - NTSB docket: https://data.ntsb.gov/Docket?ProjectID=100972 - Page: https://openairdocs.org/ntsb/ANC20CA022 ## Probable cause The pilot's failure to maintain directional control during a landing in flat light conditions, which resulted in a ground loop. ## Findings NTSB's coded findings; those marked are part of the probable cause. - [Light condition: flat light](https://openairdocs.org/ntsb-findings/03036025): Environmental issues › Conditions/weather/phenomena · Effect on operation (probable cause); cases with it: [Cessna 185, 1 case](https://openairdocs.org/ntsb-findings/03036025/cases.md?model=2072802), [All aircraft, 42 cases](https://openairdocs.org/ntsb-findings/03036025/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 185, 6 cases](https://openairdocs.org/ntsb-findings/02063040/cases.md?model=2072802), [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 185, 5 cases](https://openairdocs.org/ntsb-events/230/sequence.md?model=2072802), [All aircraft, 4,585 cases](https://openairdocs.org/ntsb-events/230/sequence.md) - [Landing-landing roll: Collision with terr/obj (non-CFIT) ](https://openairdocs.org/ntsb-events/470); cases with it: [Cessna 185, 6 cases](https://openairdocs.org/ntsb-events/470/sequence.md?model=2072802), [All aircraft, 10,189 cases](https://openairdocs.org/ntsb-events/470/sequence.md) - [Landing-flare/touchdown: Landing gear collapse](https://openairdocs.org/ntsb-events/094); cases with it: [Cessna 185, 1 case](https://openairdocs.org/ntsb-events/094/sequence.md?model=2072802), [All aircraft, 1,787 cases](https://openairdocs.org/ntsb-events/094/sequence.md) ## Analysis The pilot of the ski-equipped airplane reported that during the landing on snow covered sea ice, the airplane ground looped and the left landing gear collapsed. The left wing and fuselage sustained substantial damage. The pilot added that there was an overcast cloud ceiling with light snow showers at the time of the accident, and that he attempted the landing in "flat light" conditions on "flat terrain." The pilot reported that there were no preaccident mechanical failures or malfunctions with the airplane that would have precluded normal operation. ## Aircraft - Registration: [N969KM](https://openairdocs.org/aircraft/N969KM), registered now, S/N 185-0024, built 1961 (OpenAirDocs) - Reported make and model: Cessna 182 (A) - Registry model: [Cessna 185](https://openairdocs.org/model/cessna-185) (registry code 2072802) (OpenAirDocs) - Registry engine: [Continental I0-470 series](https://openairdocs.org/engine/continental-i0-470-series) (registry code 17027, reciprocating) (OpenAirDocs) - Category: Airplane - Serial number: 51506 - Year built: 1958 - Engines: Continental O-470 reciprocating - Damage: Substantial damage - Flight: Personal, Part 91 - Airworthiness certificate: Standard, Normal - Departed: PAKK, Koyuk, AK - Destination: 94Z, Nome, AK - Equipment: ADS-B, Handheld GPS ## Flight crew As NTSB recorded them. NTSB leaves out names. - Pilot; age 54; injuries: none; private; airplane ratings: single-engine sea, single-engine land; medical: class 3, with waivers/limitations; seat: left; restraint: 4-point; toxicology performed; flight hours: 3,850 total, 2,500 in this make and model ## Weather - Conditions: Visual (VMC), Day - Wind: 320° at 5 knots - Visibility: 2.5 statute miles - Lowest ceiling: 2,400 ft overcast - Temperature: 12 °F, dew point 9 °F - Altimeter: 29.27 inHg - Observed at: PAKK, 16 nm away ## 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 20200219001929A](https://openairdocs.org/incident/20200219001929A), Feb 19, 2020: Cessna 182A, Koyuk, AK, Substantial damage. Pilot stated they departed Koyuk AK en route to nome AK. While flying the PIC stated that due to flat light conditions it was difficult to make out ridgelines… ## Docket (2 files) The files NTSB released with the investigation on October 9, 2020, on NTSB's docket system: https://data.ntsb.gov/Docket?ProjectID=100972. 691 KB in all. - Pilot/operator aircraft accident report, NTSB form 6120.1 (item 1, PDF, 9 pages, 524 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=9950571&FileExtension=pdf&FileName=ANC20CA022%206120%20Master_Redacted-Rel.pdf - Photographs (item 2, PDF, 2 pages, 166 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=9951198&FileExtension=pdf&FileName=ANC20CA022%20photos-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.