# NTSB GAA17CA176: Stump Great Lakes 2T 1A, N305Y, Monongahela, PA, February 22, 2017 - Type: NTSB accident investigation - Classification: Accident · No injuries · Data collection · Final report - Date: February 22, 2017, 10:00 local (15:00 UTC) - Place: Monongahela, PA - Coordinates: 40.208889, -79.833885 (estimated) - Nearby events: https://openairdocs.org/map.md?lat=40.2089&lon=-79.8339&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 20, 2017 - Report: Approved by Office Director - NTSB office: General Aviation Accidents - Parties: FAA - NTSB case key (mKey): 94831 - NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=GAA17CA176 - NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/94831/pdf - NTSB docket: https://data.ntsb.gov/Docket?ProjectID=94831 - Page: https://openairdocs.org/ntsb/GAA17CA176 ## Probable cause The pilot’s failure to maintain directional control of the airplane during the landing roll with crosswind conditions. ## 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: [Stump Great Lakes 2T-1A-E, 1 case](https://openairdocs.org/ntsb-findings/01062020/cases.md?model=39122BD), [All aircraft, 3,958 cases](https://openairdocs.org/ntsb-findings/01062020/cases.md) - [Use of equip/info: aircraft control](https://openairdocs.org/ntsb-findings/02063040): Personnel issues › Task performance · Pilot (probable cause); cases with it: [Stump Great Lakes 2T-1A-E, 1 case](https://openairdocs.org/ntsb-findings/02063040/cases.md?model=39122BD), [All aircraft, 9,295 cases](https://openairdocs.org/ntsb-findings/02063040/cases.md) - [Wind: crosswind](https://openairdocs.org/ntsb-findings/03034040): Environmental issues › Conditions/weather/phenomena · Effect on operation; cases with it: [Stump Great Lakes 2T-1A-E, 1 case](https://openairdocs.org/ntsb-findings/03034040/cases.md?model=39122BD), [All aircraft, 1,008 cases](https://openairdocs.org/ntsb-findings/03034040/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: [Stump Great Lakes 2T-1A-E, 1 case](https://openairdocs.org/ntsb-events/230/sequence.md?model=39122BD), [All aircraft, 4,585 cases](https://openairdocs.org/ntsb-events/230/sequence.md) ## Analysis The pilot of a tailwheel-equipped airplane reported that the airplane veered to the right and then left. He corrected the veer to the right but "didn't get on it quick enough to stop the turn." The airplane continued to the left and ground looped. A postaccident examination revealed that the airplane sustained substantial damage to the right wing. The pilot reported that there were no preaccident mechanical failures or malfunctions with the airplane that would have precluded normal operation. The automated weather observation station on the airport reported that, about the time of the accident, the wind was from 190° at 6 knots. The pilot landed on runway 26. ## Factual narrative The pilot of a tailwheel-equipped airplane reported that, the airplane veered to the right and then left. He corrected the veer to the right, but "didn't get on it quick enough to stop the turn." The airplane continued to the left and ground looped. A postaccident examination revealed that, the airplane sustained substantial damage to the right wing. The pilot reported that there were no preaccident mechanical failures or malfunctions with the airplane that would have precluded normal operation. The automated weather observation station on the airport, about the time of the accident, reported that, the wind was from 190° at 6 knots. The pilot landed on runway 26. ## Aircraft - Registration: [N305Y](https://openairdocs.org/aircraft/N305Y), registered now, S/N 6825A-358, built 1973 (OpenAirDocs) - Reported make and model: STUMP GREAT LAKES 2T 1A (E) - Registry model: [Stump Great Lakes 2T-1A-E](https://openairdocs.org/model/stump-great-lakes-2t-1a-e) (registry code 39122BD) (OpenAirDocs) - Registry engine: [Franklin 6V 350 series](https://openairdocs.org/engine/franklin-6v-350-series) (registry code 27043, reciprocating) (OpenAirDocs) - Category: Airplane, amateur-built - Serial number: 6825A-358 - Year built: 1973 - Airframe hours: 464.6 - Engines: Franklin 6A-350-C2 215 horsepower reciprocating - Damage: Substantial damage - Flight: Personal, Part 91 - Airworthiness certificate: Standard, Aerobatic; Special, Experimental (Special) - Last inspection: Condition, February 22, 2017 - Departed: FWQ, Monongahela, PA - Destination: FWQ, Monongahela, PA - Airport: FWQ, Rostraver, runway 26, 4,002 × 75 ft, asphalt - Equipment: Unknown ## Flight crew As NTSB recorded them. NTSB leaves out names. - Pilot; age 77; injuries: none; airline transport, commercial, flight instructor; airplane ratings: single-engine land, multi-engine land; instrument ratings: airplane, helicopter; medical: class 1, with waivers/limitations; last flight review August 16, 2016; seat: rear; restraint: 4-point; flight hours: 20,330 total, 100 in this make and model, 17,500 as pilot in command, 26 in the last 90 days ## Weather - Conditions: Visual (VMC), Day - Wind: 190° at 6 knots - Visibility: 10 statute miles - Lowest ceiling: 7,000 ft overcast - Temperature: 57 °F, dew point 39 °F - Altimeter: 29.95 inHg - Observed at: KAGC, 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 20170222006489A](https://openairdocs.org/incident/20170222006489A), Feb 22, 2017: Stump Great Lakes 2T-1A-E, Rostraver, PA, Substantial damage. After landing and setting the tail wheel down the pilot had no forward view of the runway, side reference only. Pilot lost effective control of the rudder, the… ## Other investigations on N305Y (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 NYC73DGM34](https://openairdocs.org/ntsb/NYC73DGM34), Jun 5, 1973: Great Lakes 2T-1AE (N305Y), Saltsburg, PA, substantial damage ## Docket (2 files) The files NTSB released with the investigation on July 6, 2017, on NTSB's docket system: https://data.ntsb.gov/Docket?ProjectID=94831. 4.6 MB in all. - Pilot/Operator Aircraft Accident Report, NTSB Form 6120.1 (item 1, .PDF, 4.1 MB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=40453998&FileExtension=.PDF&FileName=Pilot%2FOperator%20Aircraft%20Accident%20Report,%20NTSB%20Form%206120.1-Master.PDF - Accident Photo (Courtesy of FAA) (item 2, .PDF, 1 photo, 504 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=40453999&FileExtension=.PDF&FileName=Accident%20Photo%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.