# NTSB WPR11CA414: Maule M-6-235, N6140B, Hailey, ID, August 29, 2011 - Type: NTSB accident investigation - Classification: Accident · No injuries · Data collection · Final report - Date: August 29, 2011, 13:36 local (19:36 UTC) - Place: Hailey, ID - Coordinates: 43.503887, -114.295555 (estimated) - Nearby events: https://openairdocs.org/map.md?lat=43.5039&lon=-114.2956&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 December 1, 2011 - Report: Approved by Office Director - NTSB office: Western Pacific Region - Parties: Federal Aviation Administratin - NTSB case key (mKey): 81626 - NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=WPR11CA414 - NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/81626/pdf - NTSB docket: https://data.ntsb.gov/Docket?ProjectID=81626 - Page: https://openairdocs.org/ntsb/WPR11CA414 ## Probable cause The pilot’s failure to maintain directional control during the landing rollout in a gusty, crosswind condition. ## Findings NTSB's coded findings; those marked are part of the probable cause. - [Wind: crosswind](https://openairdocs.org/ntsb-findings/03034040): Environmental issues › Conditions/weather/phenomena · Contributed to outcome; cases with it: [Maule M-6-235, 3 cases](https://openairdocs.org/ntsb-findings/03034040/cases.md?model=5460160), [All aircraft, 1,008 cases](https://openairdocs.org/ntsb-findings/03034040/cases.md) - [Wind: gusts](https://openairdocs.org/ntsb-findings/03034045): Environmental issues › Conditions/weather/phenomena · Contributed to outcome; cases with it: [Maule M-6-235, 1 case](https://openairdocs.org/ntsb-findings/03034045/cases.md?model=5460160), [All aircraft, 1,199 cases](https://openairdocs.org/ntsb-findings/03034045/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: [Maule M-6-235, 4 cases](https://openairdocs.org/ntsb-findings/01062020/cases.md?model=5460160), [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: [Maule M-6-235, 7 cases](https://openairdocs.org/ntsb-findings/02063040/cases.md?model=5460160), [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. - [Landing-landing roll: Loss of control on ground](https://openairdocs.org/ntsb-events/230) (defining event); cases with it: [Maule M-6-235, 5 cases](https://openairdocs.org/ntsb-events/230/sequence.md?model=5460160), [All aircraft, 4,585 cases](https://openairdocs.org/ntsb-events/230/sequence.md) - [Landing-landing roll: Collision with terr/obj (non-CFIT) ](https://openairdocs.org/ntsb-events/470); cases with it: [Maule M-6-235, 4 cases](https://openairdocs.org/ntsb-events/470/sequence.md?model=5460160), [All aircraft, 10,189 cases](https://openairdocs.org/ntsb-events/470/sequence.md) ## Analysis The automatic terminal information service reported that a crosswind existed with gusts up to 20 knots. The pilot said the air traffic controller confirmed the gusty wind conditions. The pilot stated that he approached and touched down using a left wing low wheel landing technique. Initially, the airplane was aligned with the runway’s centerline. After decreasing engine power and lowering the tailwheel, the pilot lost directional control. The right wing tip impacted the runway’s surface, and adjacent structural wing and aileron components were bent as the airplane veered off the runway and ground looped. The pilot reported that there were no mechanical anomalies that would have precluded normal operation. ## Factual narrative The pilot reported that the airport control tower provided wind information to him while he was in the traffic pattern for runway 31. The automatic terminal information service (ATIS) reported that the wind was from 270 degrees at 14 knots, with gusts to 20 knots. The pilot stated that he approached and touched down on the runway while using a left wing low wheel landing technique. Initially, the airplane was aligned with the runway’s centerline. After decreasing engine power and lowering the tailwheel, he lost directional control. The pilot opined that he encountered a wind gust. The right wing tip impacted the runway’s surface, and adjacent structural wing and aileron components were bent as the airplane veered off the runway and ground looped. ## Aircraft - Registration: [N6140B](https://openairdocs.org/aircraft/N6140B), registered now, S/N 7508C (OpenAirDocs) - Reported make and model: MAULE M-6-235 - Registry model: [Maule M-6-235](https://openairdocs.org/model/maule-m-6-235) (registry code 5460160) (OpenAirDocs) - Category: Airplane - Serial number: 7508C - Airframe hours: 1928 - Engines: Lycoming IO-540 235 horsepower reciprocating - Damage: Substantial damage - Flight: Personal, Part 91 - Airworthiness certificate: Standard, Normal - Last inspection: Annual, October 17, 2010, 51 hours before - Departed: MYL, McCall, ID - Destination: SUN, Hailey, ID - Airport: SUN, Friedman Memorial, runway 31, 7,550 × 100 ft, asphalt ## Flight crew As NTSB recorded them. NTSB leaves out names. - Pilot; age 55; injuries: none; private; airplane ratings: single-engine land; medical: class 3, with waivers/limitations; last flight review March 21, 2010; seat: left; flight hours: 1,728 total, 751 in this make and model, 1,625 as pilot in command, 20 in the last 90 days, 3 in the last 30 days, 0 in the last 24 hours ## Weather - Conditions: Visual (VMC), Day - Wind: 270° at 14 knots, gusting 20 - Visibility: 10 statute miles - Lowest ceiling: none - Temperature: 75 °F - Altimeter: 30.05 inHg - Observed at: SUN ## 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 20110829019039A](https://openairdocs.org/incident/20110829019039A), Aug 29, 2011: Maule M-6-235, Hailey, ID, Substantial damage. Gusty wind conditions prevailed at the time of landing, with three different reporting points on the field indicating wind directions varying as much as 100… ## Docket (4 files) The files NTSB released with the investigation on October 11, 2011, on NTSB's docket system: https://data.ntsb.gov/Docket?ProjectID=81626. 879 KB in all. - Pilot/Operator Aircraft Accident Report, NTSB Form 6120.1 (item 1, .PDF, 508 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=40354938&FileExtension=.PDF&FileName=Pilot%2FOperator%20Aircraft%20Accident%20Report,%20NTSB%20Form%206120.1-Redacted.PDF - Photo 1. Right wing, bottom view. FAA Photo (item 2, .PDF, 128 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=40354942&FileExtension=.PDF&FileName=Photo%201.%20Right%20wing,%20bottom%20view.%20FAA%20Photo-Master.PDF - Photo 2. Right wing, inboard view. FAA Photo (item 3, .PDF, 127 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=40354940&FileExtension=.PDF&FileName=Photo%202.%20%20Right%20wing,%20inboard%20view.%20%20FAA%20Photo-Master.PDF - Photo 3. Right wing, top view. FAA Photo (item 4, .PDF, 116 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=40354941&FileExtension=.PDF&FileName=Photo%203.%20%20Right%20wing,%20top%20view.%20%20FAA%20Photo-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.