# NTSB SEA08CA153: Hammond MH1, N234MH, McCall, ID, June 19, 2008 - Type: NTSB accident investigation - Classification: Accident · No injuries · Data collection · Final report - Date: June 19, 2008, 09:30 local (15:30 UTC) - Place: McCall, ID - Coordinates: 44.888889, -116.101943 - Nearby events: https://openairdocs.org/map.md?lat=44.8889&lon=-116.1019&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: 2 uninjured - Status: Completed, report July 30, 2008 - Report: Approved by Office Director - NTSB case key (mKey): 68257 - NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=SEA08CA153 - NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/68257/pdf - Page: https://openairdocs.org/ntsb/SEA08CA153 ## Probable cause The pilot's failure to maintain directional control during the landing roll, resulting in a inadvertent ground loop. Contributing to the accident were variable winds that resulted in a landing tailwind, and rough terrain. ## Findings NTSB's coded findings; those marked are part of the probable cause. - [Wind: variable wind](https://openairdocs.org/ntsb-findings/03034025): Environmental issues › Conditions/weather/phenomena · Contributed to outcome (probable cause); cases with it: [Hammond Mark O MH 1, 1 case](https://openairdocs.org/ntsb-findings/03034025/cases.md?model=056068U), [All aircraft, 113 cases](https://openairdocs.org/ntsb-findings/03034025/cases.md) - [Wind: tailwind](https://openairdocs.org/ntsb-findings/03034015): Environmental issues › Conditions/weather/phenomena · Contributed to outcome (probable cause); cases with it: [Hammond Mark O MH 1, 1 case](https://openairdocs.org/ntsb-findings/03034015/cases.md?model=056068U), [All aircraft, 594 cases](https://openairdocs.org/ntsb-findings/03034015/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: [Hammond Mark O MH 1, 1 case](https://openairdocs.org/ntsb-findings/01062020/cases.md?model=056068U), [All aircraft, 3,958 cases](https://openairdocs.org/ntsb-findings/01062020/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: [Hammond Mark O MH 1, 1 case](https://openairdocs.org/ntsb-events/230/sequence.md?model=056068U), [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: [Hammond Mark O MH 1, 1 case](https://openairdocs.org/ntsb-events/470/sequence.md?model=056068U), [All aircraft, 10,189 cases](https://openairdocs.org/ntsb-events/470/sequence.md) ## Analysis The pilot was landing his experimental tail wheel airplane in winds that were continually changing direction. Just prior to touchdown, the winds changed to a tailwind, and during the landing roll the pilot failed to maintain directional control, which resulted in a ground loop. As the airplane departed the runway, it encountered rough terrain, and sustained structural damage to the right wing and the fuselage. ## Factual narrative The pilot was landing his experimental tail wheel airplane in winds that were continually changing direction. Just prior to touchdown, the winds changed to a tailwind, and during the landing roll the pilot failed to maintain directional control, which resulted in a ground loop. As the airplane departed the runway, it encountered rough terrain, and sustained structural damage to the right wing and the fuselage. ## Aircraft - Registration: [N234MH](https://openairdocs.org/aircraft/N234MH), registered now, S/N 001 (OpenAirDocs) - Reported make and model: Hammond MH1 - Registry model: [Hammond Mark O MH 1](https://openairdocs.org/model/hammond-mark-o-mh-1) (registry code 056068U) (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: 001 - Engines: Lycoming IO-540 reciprocating - Damage: Substantial damage - Flight: Personal, Part 91 - Registered owner: Mark O. Hammond - Airworthiness certificate: Special, Experimental (Special) - Departed: 1JY2, Silver Lake, OR - Destination: KMYL, McCall, ID - Airport: KMYL, McCall Municipal Airport, runway 34, 6,108 × 75 ft, asphalt ## Flight crew As NTSB recorded them. NTSB leaves out names. - Pilot; age 61; private; airplane ratings: single-engine land, single-engine sea; medical: class 3; flight hours: 1,437 total, 228 in this make and model, 7 in the last 90 days, 5 in the last 30 days ## Weather - Conditions: Visual (VMC), Day - Visibility: 10 statute miles - Lowest ceiling: none - Temperature: 64 °F ## 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 20080619838549A](https://openairdocs.org/incident/20080619838549A), Jun 19, 2008: Hammon MH1, Mc Call, ID, Substantial damage. (-23) During landing at mccall, ID, the pilot lost directional control of the aircraft and ground looped, causing damage to the right main landing gear and the… 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.