# NTSB GAA18CA245: Ayres S2R, N40170, Weipee, ID, April 18, 2018 - Type: NTSB accident investigation - Classification: Accident · No injuries · Data collection · Final report - Date: April 18, 2018, 16:00 local (23:00 UTC) - Place: Weipee, ID - Coordinates: 46.205276, -115.582496 (estimated) - Nearby events: https://openairdocs.org/map.md?lat=46.2053&lon=-115.5825&mi=10 - Phase of flight: [Takeoff](https://openairdocs.org/ntsb-phases/300) (OpenAirDocs' grouping) - Defining event: [Takeoff: Loss of control on ground](https://openairdocs.org/ntsb-events/230) - Highest injury: No injuries - Injuries: 1 uninjured - Status: Completed, report October 24, 2018 - Report: Approved by Office Director - NTSB office: General Aviation Accidents - Parties: FAA - NTSB case key (mKey): 97152 - NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=GAA18CA245 - NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/97152/pdf - NTSB docket: https://data.ntsb.gov/Docket?ProjectID=97152 - Page: https://openairdocs.org/ntsb/GAA18CA245 ## Probable cause The pilot’s failure to maintain directional control during the takeoff roll. ## 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: [Ayres S2R-T15, 3 cases](https://openairdocs.org/ntsb-findings/02063040/cases.md?model=0970105), [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: [Ayres S2R-T15, 1 case](https://openairdocs.org/ntsb-findings/01062020/cases.md?model=0970105), [All aircraft, 3,958 cases](https://openairdocs.org/ntsb-findings/01062020/cases.md) - [Object/animal/substance](https://openairdocs.org/ntsb-findings/03022000): Environmental issues › Physical environment · Contributed to outcome; cases with it: [Ayres S2R-T15, 1 case](https://openairdocs.org/ntsb-findings/03022000/cases.md?model=0970105), [All aircraft, 224 cases](https://openairdocs.org/ntsb-findings/03022000/cases.md) ## Sequence of events The events NTSB coded, in order, by phase of flight. The defining event best describes what happened. - [Takeoff: Loss of control on ground](https://openairdocs.org/ntsb-events/230) (defining event); cases with it: [Ayres S2R-T15, 1 case](https://openairdocs.org/ntsb-events/230/sequence.md?model=0970105), [All aircraft, 4,585 cases](https://openairdocs.org/ntsb-events/230/sequence.md) - [Takeoff: Runway excursion](https://openairdocs.org/ntsb-events/300); cases with it: [Ayres S2R-T15, 1 case](https://openairdocs.org/ntsb-events/300/sequence.md?model=0970105), [All aircraft, 3,643 cases](https://openairdocs.org/ntsb-events/300/sequence.md) - [Takeoff: Collision with terr/obj (non-CFIT) ](https://openairdocs.org/ntsb-events/470); cases with it: [Ayres S2R-T15, 3 cases](https://openairdocs.org/ntsb-events/470/sequence.md?model=0970105), [All aircraft, 10,189 cases](https://openairdocs.org/ntsb-events/470/sequence.md) ## Analysis According to the Federal Aviation Administration (FAA) aviation safety inspector, the pilot in the tailwheel-equipped airplane initiated a takeoff roll to perform an agricultural application flight. During the takeoff roll on the gravel airstrip, the airplane exited the right side of the runway and collided with a drainage culvert. The airplane sustained substantial damage to the left-wing spar. The FAA inspector did not travel to the accident site. ## Factual narrative According to the Federal Aviation Administration (FAA), Aviation Safety Inspector, the pilot in the tailwheel-equipped airplane initiated a takeoff roll to perform an agricultural application flight. During the takeoff roll on the gravel airstrip, the airplane exited the right side of the runway and collided with a drainage culvert. The airplane sustained substantial damage to the left-wing spar. Despite multiple attempts to contact the pilot by telephone and email, the pilot failed to contact the National Transportation Safety Board Investigator-in-charge. The FAA Inspector did not travel to the accident site. ## Aircraft - Registration: [N40170](https://openairdocs.org/aircraft/N40170), registered now, S/N T15-005, built 1979 (OpenAirDocs) - Reported make and model: AYRES CORPORATION S2R (T15) - Registry model: [Ayres S2R-T15](https://openairdocs.org/model/ayres-s2r-t15) (registry code 0970105) (OpenAirDocs) - Registry engine: [Pratt & Whitney Canada PT6A-60A](https://openairdocs.org/engine/pratt-whitney-canada-pt6a-60a) (registry code 52043, turbo-prop) (OpenAirDocs) - Category: Airplane - Serial number: T15-005 - Year built: 1979 - Engines: Pratt & Whitney PT6A-60A 600 horsepower reciprocating - Damage: Substantial damage - Flight: Aerial application, Part 137 - Operator: Moro Aircraft Leasing Inc - Registered owner: Moro Aircraft Leasing Inc - Airworthiness certificate: Special, Restricted (Special) - Departed: PVT, Weipee, ID - Destination: PVT, Weipee, ID - Airport: PVT, Private Airstrip - Equipment: Unknown ## Flight crew As NTSB recorded them. NTSB leaves out names. - Pilot; age 65; injuries: none; commercial; airplane ratings: single-engine land; medical: class 2, with waivers/limitations; flight hours: 25,000 total ## Weather - Conditions: Visual (VMC), Day - Wind: 10° at 4 knots - Temperature: 64 °F, dew point 32 °F - Altimeter: 30.10 inHg - Observed at: KP69, 4 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). - [Incident 20180418016859I](https://openairdocs.org/incident/20180418016859I), Apr 18, 2018: Ayres Corporation S2R-T15, Weippe, ID, Minor damage. On takeoff roll on a dirt road/runway, the pilot experienced a gusty quartering tailwind. Thi lifted the tail so that the prop impinged upon the ground. The… ## Docket (2 files) The files NTSB released with the investigation on September 17, 2018, on NTSB's docket system: https://data.ntsb.gov/Docket?ProjectID=97152. 189 KB in all. - Memorandum for Record – FAA Inspector (item 1, .PDF, 122 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=40466711&FileExtension=.PDF&FileName=Memorandum%20for%20Record%20%E2%80%93%20FAA%20Inspector-Master.PDF - Photo (item 2, .PDF, 67 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=40466712&FileExtension=.PDF&FileName=Photo-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.