# NTSB GAA15CA194: Air Tractor AT 402B, N402KN, Monte Vista, CO, July 22, 2015 - Type: NTSB accident investigation - Classification: Accident · No injuries · Data collection · Final report - Date: July 22, 2015, 14:00 local (19:00 UTC) - Place: Monte Vista, CO - Coordinates: 37.52861, -106.045829 (estimated) - Nearby events: https://openairdocs.org/map.md?lat=37.5286&lon=-106.0458&mi=10 - Phase of flight: [Landing](https://openairdocs.org/ntsb-phases/550) (OpenAirDocs' grouping) - Defining event: [Landing-flare/touchdown: Abnormal runway contact](https://openairdocs.org/ntsb-events/090) - Highest injury: No injuries - Injuries: 1 uninjured - Status: Completed, report September 30, 2015 - Report: Approved by Office Director - NTSB office: General Aviation Accidents - Parties: Federal Aviation Administration - NTSB case key (mKey): 91610 - NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=GAA15CA194 - NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/91610/pdf - NTSB docket: https://data.ntsb.gov/Docket?ProjectID=91610 - Page: https://openairdocs.org/ntsb/GAA15CA194 ## Probable cause The pilot's failure to maintain directional control during the landing, which resulted in a runway excursion and collision with objects. ## Findings NTSB's coded findings; those marked are part of the probable cause. - [Use of equip/info: aircraft control](https://openairdocs.org/ntsb-findings/02063040): Personnel issues › Task performance · Pilot (probable cause); cases with it: [Air Tractor AT-402B, 7 cases](https://openairdocs.org/ntsb-findings/02063040/cases.md?model=0390208), [All aircraft, 9,295 cases](https://openairdocs.org/ntsb-findings/02063040/cases.md) - [Performance/control parameters: directional control](https://openairdocs.org/ntsb-findings/01062020): Aircraft › Aircraft oper/perf/capability · Not attained/maintained (probable cause); cases with it: [Air Tractor AT-402B, 4 cases](https://openairdocs.org/ntsb-findings/01062020/cases.md?model=0390208), [All aircraft, 3,958 cases](https://openairdocs.org/ntsb-findings/01062020/cases.md) - [Object/animal/substance: ground vehicle](https://openairdocs.org/ntsb-findings/03022025): Environmental issues › Physical environment · Contributed to outcome; cases with it: [Air Tractor AT-402B, 1 case](https://openairdocs.org/ntsb-findings/03022025/cases.md?model=0390208), [All aircraft, 132 cases](https://openairdocs.org/ntsb-findings/03022025/cases.md) ## Sequence of events The events NTSB coded, in order, by phase of flight. The defining event best describes what happened. - [Landing-flare/touchdown: Abnormal runway contact](https://openairdocs.org/ntsb-events/090) (defining event); cases with it: [Air Tractor AT-402B, 1 case](https://openairdocs.org/ntsb-events/090/sequence.md?model=0390208), [All aircraft, 1,506 cases](https://openairdocs.org/ntsb-events/090/sequence.md) - [Landing-aborted after touchdown: Attempted remediation/recovery](https://openairdocs.org/ntsb-events/060); cases with it: [Air Tractor AT-402B, 3 cases](https://openairdocs.org/ntsb-events/060/sequence.md?model=0390208), [All aircraft, 1,422 cases](https://openairdocs.org/ntsb-events/060/sequence.md) - [After landing: Loss of control on ground](https://openairdocs.org/ntsb-events/230); cases with it: [Air Tractor AT-402B, 4 cases](https://openairdocs.org/ntsb-events/230/sequence.md?model=0390208), [All aircraft, 4,585 cases](https://openairdocs.org/ntsb-events/230/sequence.md) - [Landing-landing roll: Runway excursion](https://openairdocs.org/ntsb-events/300); cases with it: [Air Tractor AT-402B, 4 cases](https://openairdocs.org/ntsb-events/300/sequence.md?model=0390208), [All aircraft, 3,643 cases](https://openairdocs.org/ntsb-events/300/sequence.md) - [After landing: Ground collision](https://openairdocs.org/ntsb-events/200); cases with it: [Air Tractor AT-402B, 1 case](https://openairdocs.org/ntsb-events/200/sequence.md?model=0390208), [All aircraft, 618 cases](https://openairdocs.org/ntsb-events/200/sequence.md) ## Analysis The pilot stated that during the landing roll, the airplane became airborne after encountering a wind gust. He reported that the airplane bounced as it settled back to the runway, veered to the right, and departed the runway. During the runway excursion, the airplane impacted several vehicles. The airplane sustained substantial damage to both wings and the fuselage. The pilot reported that there were no pre-impact mechanical failures or malfunctions that would have precluded normal operation. ## Factual narrative The pilot stated that during the landing roll, the airplane became airborne after encountering a wind gust. He reported that the airplane bounced as it settled back to the runway, veered to the right, and departed the runway. During the runway excursion, the airplane impacted several vehicles. The airplane sustained substantial damage to both wings and the fuselage. The pilot reported that there were no pre-impact mechanical failures or malfunctions that would have precluded normal operation. ## Aircraft - Registration: [N402KN](https://openairdocs.org/deregistered/N402KN-2021-11-10), registration cancelled 2021-11-10, S/N 402B-1159, built 2005 (OpenAirDocs) - Reported make and model: AIR TRACTOR INC AT 402B (B) - Registry model: [Air Tractor AT-402B](https://openairdocs.org/model/air-tractor-at-402b) (registry code 0390208) (OpenAirDocs) - Registry engine: [Pratt & Whitney PT6A series](https://openairdocs.org/engine/pratt-whitney-pt6a-series) (registry code 52034, reciprocating) (OpenAirDocs) - Category: Airplane - Serial number: 402B-1159 - Year built: 2005 - Airframe hours: 1599.7 - Engines: Pratt & Whitney PT6-34AG 750 horsepower turbo prop - Damage: Substantial damage - Flight: Aerial application, Part 137 - Airworthiness certificate: Special, Restricted (Special) - Last inspection: Annual, January 24, 2015, 100 hours before - Departed: MVI, Monte Vista, CO - Destination: MVI, Monte Vista, CO - Airport: MVI, Monte Vista Municipal, runway 34, 2,300 × 30 ft, dirt - Equipment: Stall warning system ## Flight crew As NTSB recorded them. NTSB leaves out names. - Pilot; age 29; injuries: none; commercial; airplane ratings: single-engine land; medical: class 2, without waivers/limitations; last flight review April 18, 2014; seat: center; restraint: 4-point; flight hours: 1,300 total, 100 in this make and model, 1,100 as pilot in command, 100 in the last 90 days, 75 in the last 30 days ## Weather - Conditions: Visual (VMC), Day - Wind: 150° at 10 knots - Visibility: 10 statute miles - Lowest ceiling: none - Temperature: 77 °F, dew point 36 °F - Altimeter: 30.20 inHg - Observed at: KALS, 10 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 20150722012569A](https://openairdocs.org/incident/20150722012569A), Jul 22, 2015: Air Tractor Inc AT-402B, Monte Vista, CO, Substantial damage. On 07/22/2015 at approximately 1235 MDT, N402KN an Air tractor model AT-402B airplane was substantially damaged after impacting two parked vehicles at the… ## Docket (1 files) The files NTSB released with the investigation on September 11, 2015, on NTSB's docket system: https://data.ntsb.gov/Docket?ProjectID=91610. 59 KB in all. - Substantial damage to left side of airplane (Courtesy of FAA) (item 1, .PDF, 59 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=40431695&FileExtension=.PDF&FileName=Substantial%20damage%20to%20left%20side%20of%20airplane%20(Courtesy%20of%20FAA)-Master.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.