# NTSB WPR22LA328: Fall Martin Super CUB, N25MF, Stanley, ID, August 19, 2022 - Type: NTSB accident investigation - Classification: Accident · No injuries · Class 4 · Limited · Final report - Date: August 19, 2022, 16:30 local (22:30 UTC) - Place: Stanley, ID - Coordinates: 44.212199, -114.93347 - Nearby events: https://openairdocs.org/map.md?lat=44.2122&lon=-114.9335&mi=10 - Phase of flight: [Takeoff](https://openairdocs.org/ntsb-phases/300) (OpenAirDocs' grouping) - Defining event: [Takeoff: Loss of control in flight](https://openairdocs.org/ntsb-events/240) - Highest injury: No injuries - Injuries: 2 uninjured - Status: Completed - Report: Approved by Office Director - Investigation class: Class 4 - Basic report with no Prelim publish - NTSB office: Western Pacific Region - Parties: FAA-FSDO - NTSB case key (mKey): 105840 - NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=WPR22LA328 - NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/105840/pdf - NTSB docket: https://data.ntsb.gov/Docket?ProjectID=105840 - Page: https://openairdocs.org/ntsb/WPR22LA328 ## Probable cause The pilot’s failure to maintain airplane control during takeoff with a crosswind. ## 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: [Fall Martin CUB, 1 case](https://openairdocs.org/ntsb-findings/01062020/cases.md?model=05617GR), [All aircraft, 3,958 cases](https://openairdocs.org/ntsb-findings/01062020/cases.md) - [Wind: crosswind](https://openairdocs.org/ntsb-findings/03034040): Environmental issues › Conditions/weather/phenomena · Effect on operation; cases with it: [Fall Martin CUB, 1 case](https://openairdocs.org/ntsb-findings/03034040/cases.md?model=05617GR), [All aircraft, 1,008 cases](https://openairdocs.org/ntsb-findings/03034040/cases.md) - [Use of equip/info: aircraft control](https://openairdocs.org/ntsb-findings/02063040): Personnel issues › Task performance · Pilot (probable cause); cases with it: [Fall Martin CUB, 1 case](https://openairdocs.org/ntsb-findings/02063040/cases.md?model=05617GR), [All aircraft, 9,295 cases](https://openairdocs.org/ntsb-findings/02063040/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 in flight](https://openairdocs.org/ntsb-events/240) (defining event); cases with it: [Fall Martin CUB, 1 case](https://openairdocs.org/ntsb-events/240/sequence.md?model=05617GR), [All aircraft, 5,002 cases](https://openairdocs.org/ntsb-events/240/sequence.md) - [Takeoff: Ground collision](https://openairdocs.org/ntsb-events/200); cases with it: [Fall Martin CUB, 1 case](https://openairdocs.org/ntsb-events/200/sequence.md?model=05617GR), [All aircraft, 618 cases](https://openairdocs.org/ntsb-events/200/sequence.md) ## Analysis The pilot of the tailwheel equipped airplane reported that, the windsock indicated a left crosswind for runway 17. As the airplane lifted off, it experienced a “sudden and extreme right drift”. The pilot attempted corrective action however the drift was uncontrollable, so he turned to the right to avoid a collision with other parked aircraft. The pilot continued the takeoff, however the airplane settled and subsequently collided with terrain. The airplane sustained substantial damage to the fuselage and longerons. The pilot reported that there were no mechanical failures or malfunctions with the airplane that would have precluded normal operation. ## Aircraft - Registration: [N25MF](https://openairdocs.org/aircraft/N25MF), registered now, S/N 5 (OpenAirDocs) - Reported make and model: FALL MARTIN SUPER CUB - Registry model: [Fall Martin CUB](https://openairdocs.org/model/fall-martin-cub) (registry code 05617GR) (OpenAirDocs) - Registry engine: [Amateur-built UNKNOWN ENG](https://openairdocs.org/engine/amateur-built-unknown-eng) (registry code 99999) (OpenAirDocs) - Category: Airplane, amateur-built - Serial number: 5 - Year built: 2004 - Airframe hours: 255 - Engines: Smith/Martin Fall Martin Fall Cub 180 horsepower reciprocating - Damage: Substantial damage - Flight: Personal, Part 91 - Operator: Bud Sommerville - Registered owner: WILHITE LUCAS J/ Bud Sommerville - Airworthiness certificate: Special, Experimental (Special) - Last inspection: Annual, May 19, 2022 - Destination: Same as departure - Airport: 2U7, Stanley Airport, runway 17, 4,300 × 150 ft, dirt - Equipment: Electronic flight bag or handheld device, Electronic multifunction display ## Flight crew As NTSB recorded them. NTSB leaves out names. - Pilot; age 41; injuries: none; airline transport, commercial; airplane ratings: multi-engine land, single-engine land; instrument ratings: airplane, helicopter; medical: class 1, with waivers/limitations; last flight review July 11, 2022; seat: front; restraint: 3-point; flight hours: 3,940 total, 32 in this make and model, 1,108 as pilot in command ## Weather - Conditions: Visual (VMC), Day - Visibility: 10 statute miles - Observed at: N/A ## 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 20220819014769A](https://openairdocs.org/incident/20220819014769A), Aug 19, 2022: Fall Martin CUB, Stanley, ID, Substantial damage. The airman elected to takeoff during gusty crosswind conditions. Convective activity existed in the area at the time. During the takeoff roll he lost control… ## Other investigations on N25MF (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 CHI04LA245](https://openairdocs.org/ntsb/CHI04LA245), Aug 21, 2004: Fall Cub (N25MF), Rockville, IN, substantial damage. Probable cause: The fuel starvation encountered due to the builder's inadequate fuel system design and the subsequent loss of engine power during a maneuver for the landing approach. Factors were the tree and corn. ## Docket (2 files) The files NTSB released with the investigation on December 9, 2022, on NTSB's docket system: https://data.ntsb.gov/Docket?ProjectID=105840. 2.4 MB in all. - Pilot/operator aircraft accident report, NTSB form 6120.1 (item 1, PDF, 11 pages, 2.2 MB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=14544960&FileExtension=pdf&FileName=6120_Redacted-Rel.pdf - Photos of airplane (item 2, PDF, 2 pages, 222 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=14761535&FileExtension=pdf&FileName=Photos%20of%20Airplane-Rel.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.