# NTSB GAA18CA091: Aviat A-1, N33HY, Phoenix, AZ, December 19, 2017 - Type: NTSB accident investigation - Classification: Accident · No injuries · Data collection · Final report - Date: December 19, 2017, 15:15 local (22:15 UTC) - Place: Phoenix, AZ - Coordinates: 33.688331, -112.082496 (estimated) - Nearby events: https://openairdocs.org/map.md?lat=33.6883&lon=-112.0825&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: 1 uninjured - Status: Completed, report July 5, 2018 - Report: Approved by Office Director - NTSB office: General Aviation Accidents - Parties: FAA - NTSB case key (mKey): 96516 - NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=GAA18CA091 - NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/96516/pdf - NTSB docket: https://data.ntsb.gov/Docket?ProjectID=96516 - Page: https://openairdocs.org/ntsb/GAA18CA091 ## Probable cause The pilot’s failure to maintain directional control of the airplane during the landing. ## 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: [Aviat A-1B, 33 cases](https://openairdocs.org/ntsb-findings/02063040/cases.md?model=2210406), [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: [Aviat A-1B, 21 cases](https://openairdocs.org/ntsb-findings/01062020/cases.md?model=2210406), [All aircraft, 3,958 cases](https://openairdocs.org/ntsb-findings/01062020/cases.md) - [Wind: gusts](https://openairdocs.org/ntsb-findings/03034045): Environmental issues › Conditions/weather/phenomena · Effect on operation; cases with it: [Aviat A-1B, 6 cases](https://openairdocs.org/ntsb-findings/03034045/cases.md?model=2210406), [All aircraft, 1,199 cases](https://openairdocs.org/ntsb-findings/03034045/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: [Aviat A-1B, 24 cases](https://openairdocs.org/ntsb-events/230/sequence.md?model=2210406), [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: [Aviat A-1B, 9 cases](https://openairdocs.org/ntsb-events/300/sequence.md?model=2210406), [All aircraft, 3,643 cases](https://openairdocs.org/ntsb-events/300/sequence.md) - [Landing-landing roll: Landing gear collapse](https://openairdocs.org/ntsb-events/094); cases with it: [Aviat A-1B, 2 cases](https://openairdocs.org/ntsb-events/094/sequence.md?model=2210406), [All aircraft, 1,787 cases](https://openairdocs.org/ntsb-events/094/sequence.md) ## Analysis According to the pilot of the tailwheel-equipped airplane, his intent was to perform a wheel landing, but during touchdown, the airplane bounced and a gust of wind lifted the left wing. The pilot applied left stick and right rudder to maintain directional control. The left wing settled, the nose of the airplane yawed to the right, and the tailwheel settled to the runway. The pilot applied aft stick and left rudder, but the left wing lifted again, and the nose yawed to the left. The right wing struck the ground and the airplane exited the runway to the left, where the right main landing gear collapsed. The airplane came to rest on the right wingtip and began leaking fuel. The airplane sustained substantial damage to the right-wing. The pilot reported that there were no preaccident mechanical malfunctions or failures with the airplane that would have precluded normal operation. ## Factual narrative According to the pilot in the tailwheel equipped airplane, his intent was to perform a wheel landing, but during touchdown, the airplane bounced, and a gust of wind lifted the left wing. The pilot applied left stick and right rudder to maintain directional control. The left wing settled, the nose of the airplane yawed to the right, and the tailwheel settled to the runway. The pilot applied aft stick and left rudder, but the left wing lifted again, and the nose yawed to the left. The right wing struck the ground and the airplane exited the runway to the left, where the right main landing gear collapsed. The airplane came to rest on the right wingtip and began leaking fuel. The airplane sustained substantial damage to the right-wing. The pilot reported that there were no preaccident mechanical malfunctions or failures with the airplane that would have precluded normal operation. ## Aircraft - Registration: [N33HY](https://openairdocs.org/aircraft/N33HY), registered now, S/N 2410, built 2007 (OpenAirDocs) - Reported make and model: AVIAT AIRCRAFT INC A-1 (B) - Registry model: [Aviat A-1B](https://openairdocs.org/model/aviat-a-1b) (registry code 2210406) (OpenAirDocs) - Registry engine: [Lycoming O-360-A1P](https://openairdocs.org/engine/lycoming-o-360-a1p) (registry code 42259, reciprocating) (OpenAirDocs) - Category: Airplane - Serial number: 2410 - Year built: 2007 - Airframe hours: 718 - Engines: LYCOMING O-360-A1P 180 horsepower reciprocating - Damage: Substantial damage - Flight: Personal, Part 91 - Airworthiness certificate: Standard, Normal - Last inspection: Annual, September 19, 2017 - Departed: DVT, Phoenix, AZ - Destination: DVT, Phoenix, AZ - Airport: DVT, Phoenix Deer Valley, runway 25L, 8,196 × 100 ft, asphalt - Equipment: Angle of attack indicator, Electronic flight bag or handheld device, Stall warning system ## Flight crew As NTSB recorded them. NTSB leaves out names. - Pilot; age 57; injuries: none; private; airplane ratings: single-engine land; medical: class 3, with waivers/limitations; last flight review April 21, 2016; seat: front; restraint: 4-point; flight hours: 247 total, 58 in this make and model, 138 as pilot in command, 12 in the last 90 days, 8 in the last 30 days, 1 in the last 24 hours ## Weather - Conditions: Visual (VMC), Day - Wind: calm - Visibility: 10 statute miles - Lowest ceiling: none - Temperature: 63 °F, dew point 34 °F - Altimeter: 30.15 inHg - Observed at: KDVT ## 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 20171219023739A](https://openairdocs.org/incident/20171219023739A), Dec 19, 2017: Aviat Aircraft Inc A-1B, Phoenix, AZ, Substantial damage. On December 19, 2017 at 1410 local, a huskey Aviat A1B, N33HY, operating on a local pleasure flight , departed the left side of runway 25L at deer valley AZ… ## Other investigations on N33HY (1) 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. - [NTSB WPR14CA151](https://openairdocs.org/ntsb/WPR14CA151), Mar 29, 2014: Aviat A 1B (N33HY), Eloy, AZ, substantial damage. Probable cause: The pilot's failure to maintain directional control during takeoff. ## Docket (2 files) The files NTSB released with the investigation on May 14, 2018, on NTSB's docket system: https://data.ntsb.gov/Docket?ProjectID=96516. 4.0 MB in all. - Pilot/Operator Aircraft Accident Report, NTSB Form 6120.1 (item 1, .PDF, 3.8 MB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=40463133&FileExtension=.PDF&FileName=Pilot%2FOperator%20Aircraft%20Accident%20Report,%20NTSB%20Form%206120.1-Master.PDF - Photo (Courtesy of FAA) (item 2, .PDF, 1 photo, 267 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=40463134&FileExtension=.PDF&FileName=Photo%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.