# NTSB ANC12CA054: Cessna 172, N5874A, Skwentna, AK, June 16, 2012 - Type: NTSB accident investigation - Classification: Accident · No injuries · Data collection · Final report - Date: June 16, 2012, 13:00 local (21:00 UTC) - Place: Skwentna, AK - Coordinates: 61.850276, -151.10028 (estimated) - Nearby events: https://openairdocs.org/map.md?lat=61.8503&lon=-151.1003&mi=10 - Phase of flight: [Landing](https://openairdocs.org/ntsb-phases/550) (OpenAirDocs' grouping) - Defining event: [Landing-landing roll: Runway incursion veh/AC/person](https://openairdocs.org/ntsb-events/320) - Highest injury: No injuries - Injuries: 2 uninjured - Status: Completed, report October 15, 2012 - Report: Approved by Office Director - NTSB office: Alaska Regional Office - Parties: Federal Aviation Administration - NTSB case key (mKey): 84027 - NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=ANC12CA054 - NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/84027/pdf - NTSB docket: https://data.ntsb.gov/Docket?ProjectID=84027 - Page: https://openairdocs.org/ntsb/ANC12CA054 ## Probable cause The improper decision of the driver of the all-terrain vehicle to enter an active runway. ## Findings NTSB's coded findings; those marked are part of the probable cause. - [Object/animal/substance: ground vehicle](https://openairdocs.org/ntsb-findings/03022025): Environmental issues › Physical environment · Ability to respond/compensate; cases with it: [Cessna 172, 1 case](https://openairdocs.org/ntsb-findings/03022025/cases.md?model=2072402), [All aircraft, 132 cases](https://openairdocs.org/ntsb-findings/03022025/cases.md) - [Info processing/decision: decision making/judgment](https://openairdocs.org/ntsb-findings/02041520): Personnel issues › Action/decision · Other (probable cause); cases with it: [Cessna 172, 19 cases](https://openairdocs.org/ntsb-findings/02041520/cases.md?model=2072402), [All aircraft, 3,098 cases](https://openairdocs.org/ntsb-findings/02041520/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: Runway incursion veh/AC/person](https://openairdocs.org/ntsb-events/320) (defining event); cases with it: [Cessna 172, 1 case](https://openairdocs.org/ntsb-events/320/sequence.md?model=2072402), [All aircraft, 104 cases](https://openairdocs.org/ntsb-events/320/sequence.md) ## Analysis The pilot was landing on a gravel runway as part of an organized fly-in event. During the landing roll, an all-terrain vehicle (ATV) entered and proceeded down the runway, weaving from side to side. To avoid the ATV, the pilot pulled back on the control yoke. The airplane climbed and then drifted to the left, striking a tree on the edge of the runway; the airplane then turned left 180 degrees and came to rest in the brush alongside the runway. The airplane sustained substantial damage to the right aileron. The pilot noted that the accident might have been avoided if the organization that hosted the event had taken responsibility for securing the runway. ## Factual narrative The pilot was landing on a gravel runway as part of a organized fly-in event. During the landing roll an all-terrain vehicle (ATV) entered, and proceeded down the runway weaving from side-to-side. In an attempt to avoid the ATV he pulled back on the control yoke, and climbed the airplane over the ATV. The airplane drifted to the left, and struck a tree on the edge of the runway; it then turned left 180 degrees, and came to rest in the brush alongside the runway. The airplane sustained substantial damage to the right aileron. In the pilot’s written statement to the National Transportation Safety Board he noted that the accident might have been avoided if organizations which host these type of events took responsibility for securing the runway. ## Aircraft - Registration: [N5874A](https://openairdocs.org/aircraft/N5874A), registered now, S/N 28474, built 1956 (OpenAirDocs) - Reported make and model: CESSNA 172 - Registry model: [Cessna 172](https://openairdocs.org/model/cessna-172) (registry code 2072402) (OpenAirDocs) - Registry engine: [Continental 0-300 series](https://openairdocs.org/engine/continental-0-300-series) (registry code 17022, reciprocating) (OpenAirDocs) - Category: Airplane - Serial number: 28474 - Airframe hours: 3380 - Engines: CONT MOTOR O-300 SER 145 horsepower reciprocating - Damage: Substantial damage - Flight: Personal, Part 91 - Airworthiness certificate: Standard, Normal - Last inspection: Annual, February 24, 2012 - Departed: Z41, Anchorage, AK - Destination: Skwentna, AK - Airport: PASW, Skwentna ## Flight crew As NTSB recorded them. NTSB leaves out names. - Pilot; age 65; injuries: none; private; airplane ratings: single-engine land; medical: class 3, with waivers/limitations; last flight review March 3, 2012; seat: left; flight hours: 529 total, 420 in this make and model, 7 in the last 90 days, 5 in the last 30 days ## Weather - Conditions: Visual (VMC), Day - Wind: variable at 3 knots - Visibility: 30 statute miles - Lowest ceiling: 4,500 ft broken - Temperature: 66 °F, dew point 48 °F - Observed at: PASW, 8 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 20120616013169A](https://openairdocs.org/incident/20120616013169A), Jun 16, 2012: Cessna 172, Skwentna, AK, Substantial damage. This was a pleasure part 91 flight. There was one passenger. The pilot was flying to a Cessna 170 club event at eight mile gravel strip, located 8 miles south… ## Docket (1 files) The files NTSB released with the investigation on August 8, 2012, on NTSB's docket system: https://data.ntsb.gov/Docket?ProjectID=84027. 657 KB in all. - Pilot/Operator Aircraft Accident Report, NTSB Form 6120.1 (item 1, .PDF, 657 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=40374590&FileExtension=.PDF&FileName=Pilot%2FOperator%20Aircraft%20Accident%20Report,%20NTSB%20Form%206120.1-Redacted.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.