# NTSB WPR09CA456: Aviat A-1C, N82PL, McArthur, CA, September 18, 2009 - Type: NTSB accident investigation - Classification: Accident · No injuries · Data collection · Final report - Date: September 17, 2009, 19:00 local (Sep 18, 2009, 02:00 UTC) - Place: McArthur, CA - Coordinates: 41.456665, -120.622497 (estimated) - Nearby events: https://openairdocs.org/map.md?lat=41.4567&lon=-120.6225&mi=10 - Phase of flight: [Landing](https://openairdocs.org/ntsb-phases/550) (OpenAirDocs' grouping) - Defining event: [Landing-landing roll: Wildlife encounter (non-bird)](https://openairdocs.org/ntsb-events/310) - Highest injury: No injuries - Injuries: 2 uninjured - Status: Completed, report December 29, 2009 - Report: Approved by Office Director - NTSB office: Western Pacific Region - Parties: Federal Aviation Administration FSDO - NTSB case key (mKey): 74755 - NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=WPR09CA456 - NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/74755/pdf - NTSB docket: https://data.ntsb.gov/Docket?ProjectID=74755 - Page: https://openairdocs.org/ntsb/WPR09CA456 ## Probable cause The pilot's failure to maintain aircraft control during landing due to animals unexpectedly running onto the runway. ## 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: [Aviat A-1C-200, 9 cases](https://openairdocs.org/ntsb-findings/01062020/cases.md?model=2210411), [All aircraft, 3,958 cases](https://openairdocs.org/ntsb-findings/01062020/cases.md) - [Object/animal/substance: animal(s)/bird(s)](https://openairdocs.org/ntsb-findings/03022045): Environmental issues › Physical environment · Effect on operation (probable cause); cases with it: [Aviat A-1C-200, 1 case](https://openairdocs.org/ntsb-findings/03022045/cases.md?model=2210411), [All aircraft, 358 cases](https://openairdocs.org/ntsb-findings/03022045/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: Wildlife encounter (non-bird)](https://openairdocs.org/ntsb-events/310) (defining event); cases with it: [Aviat A-1C-200, 1 case](https://openairdocs.org/ntsb-events/310/sequence.md?model=2210411), [All aircraft, 107 cases](https://openairdocs.org/ntsb-events/310/sequence.md) - [Landing-landing roll: Nose over/nose down](https://openairdocs.org/ntsb-events/096); cases with it: [Aviat A-1C-200, 7 cases](https://openairdocs.org/ntsb-events/096/sequence.md?model=2210411), [All aircraft, 2,287 cases](https://openairdocs.org/ntsb-events/096/sequence.md) ## Analysis The pilot, who was located in the front seat of the tail wheel equipped airplane, had just completed two uneventful full stop landings at the private grass airstrip. The pilot in the rear seat then took the controls, and departed with the intention of performing a full stop landing. The rear seated pilot stated that during the landing, cattle ran from behind a line of trees, and onto the runway. He did not have enough separation from the cattle to perform a go-around, so he aggressively applied the brakes. The airplane subsequently nosed over causing substantial damage to the wings. ## Factual narrative The pilot, who was located in the front seat of the tail wheel equipped airplane, had just completed two uneventful full stop landings at the private grass airstrip. The pilot in the rear seat then took the controls, and departed with the intention of performing a full stop landing. The rear seated pilot stated that during the landing, cattle ran from behind a line of trees, and onto the runway. He did not have enough separation from the cattle to perform a go-around, so he aggressively applied the brakes. The airplane subsequently nosed over causing substantial damage to the wings. ## Aircraft - Registration: [N82PL](https://openairdocs.org/aircraft/N82PL), registered now, S/N 3047, built 2008 (OpenAirDocs) - Reported make and model: AVIAT AIRCRAFT INC A-1C - Registry model: [Aviat A-1C-200](https://openairdocs.org/model/aviat-a-1c-200) (registry code 2210411) (OpenAirDocs) - Registry engine: [Lycoming IO-360-A1D6](https://openairdocs.org/engine/lycoming-io-360-a1d6) (registry code 41822, reciprocating) (OpenAirDocs) - Category: Airplane - Serial number: 3047 - Airframe hours: 236 - Engines: Lycoming IO-360 200 horsepower reciprocating - Damage: Substantial damage - Flight: Personal, Part 91 - Airworthiness certificate: Standard, Normal - Last inspection: Annual, December 18, 2008 - Departed: PVT, McArthur, CA - Destination: PVT, McArthur, CA - Airport: PVT, Oilar Private Airstrip, runway 24, 1,100 × 40 ft, grass/turf ## Flight crew As NTSB recorded them. NTSB leaves out names. - Pilot; age 27; injuries: none; commercial; airplane ratings: single-engine land; instrument ratings: airplane; medical: class 2, without waivers/limitations; last flight review February 28, 2008; seat: rear; flight hours: 2,160 total, 51 in this make and model, 300 in the last 90 days, 50 in the last 30 days, 0 in the last 24 hours - Co-pilot; age 45; injuries: none; private; airplane ratings: single-engine land; medical: class 3, without waivers/limitations; seat: front; flight hours: 0 total, 0 in this make and model ## Weather - Conditions: Visual (VMC), Day - Wind: 10° at 4 knots - Visibility: 10 statute miles - Lowest ceiling: none - Temperature: 77 °F, dew point 32 °F - Altimeter: 30.07 inHg - Observed at: AAT, 50 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 20090917016769A](https://openairdocs.org/incident/20090917016769A), Sep 17, 2009: Skyint A1C200, Fall River Mil, CA, Substantial damage. During the landing roll out on his private strip, a cow unexpectedly ran in front of aircraft. Pilot applied the brakes heavily to avoid hitting the cow.… ## Docket (1 files) The files NTSB released with the investigation on October 23, 2009, on NTSB's docket system: https://data.ntsb.gov/Docket?ProjectID=74755. 647 KB in all. - Pilot/Operator Aircraft Accident Report, NTSB Form 6120.1 (item 1, .PDF, 647 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=40320312&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.