# NTSB DEN00LA077: Beech A36TC, N305MM, Monument Valley, UT, April 21, 2000 - Type: NTSB accident investigation - Classification: Accident · No injuries · Limited investigation · Final report - Date: April 21, 2000, 15:00 local (21:00 UTC) - Place: Monument Valley, UT - Coordinates: 37.080356, -110.250968 (estimated) - Nearby events: https://openairdocs.org/map.md?lat=37.0804&lon=-110.2510&mi=10 - Phase of flight: [Landing](https://openairdocs.org/ntsb-phases/550) (OpenAirDocs' grouping) - Highest injury: No injuries - Injuries: 1 uninjured - Status: Completed, report December 4, 2000 - Report: Approved by Office Director - NTSB case key (mKey): 49039 - NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=DEN00LA077 - NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/49039/pdf - Page: https://openairdocs.org/ntsb/DEN00LA077 ## Probable cause Failure by the pilot to maintain control of the aircraft during landing roll. Factors were a dust devil/whirlwind and the pilot's lack of landing currency. ## Sequence of events In NTSB's coding before 2008 (https://www.ntsb.gov/GILS/Documents/codman.pdf). - Loss of control - on ground/water, landing - roll - weather condition - dust devil/whirlwind (contributing factor) - aircraft control - not maintained, pilot in command (cause) - lack of recent experience in type operation, pilot in command (contributing factor) - Gear collapsed, landing - roll ## Analysis While on landing roll, a 'whirlwind' was encountered which turned the aircraft 90 degrees collapsing the landing gear, which caused substantial damage to the airframe. The pilot was not current in landings, and the National Weather Service had issued an alert bulletin forecasting turbulence for the area. ## Factual narrative On April 21, 2000, at 1500 mountain daylight time, a Beech A36TC, N305MM, sustained substantial damage when the main landing gear collapsed during landing roll at Monument Valley, Utah. The private pilot and his passenger were not injured. The flight was operating under Title 14 CFR Part 91 and no flight plan was filed. The flight departed Farmington, New Mexico, at 1300. According to the pilot, during landing roll a wind gust ("whirlwind") was encountered which turned the aircraft 90 degrees and the main landing gear collapsed. Although no weather reporting stations were located in the area where the accident occurred, the National Weather Service had issued an Alert Bulletin, stating that turbulence was forecast for the area. The pilot provided information that the wings, fuselage, propeller, and the landing gear sustained damage. According to the FAA inspector who examined the pilot's log after the accident, the pilot was not current in landings in the past 90 days. ## Aircraft - Registration: [N305MM](https://openairdocs.org/aircraft/N305MM), registered now, S/N EA-188, built 1980 (OpenAirDocs) - Reported make and model: Beech A36TC - Registry model: [Beech A36TC](https://openairdocs.org/model/beech-a36tc) (registry code 1151603) (OpenAirDocs) - Registry engine: [Continental TSIO-520 series](https://openairdocs.org/engine/continental-tsio-520-series) (registry code 17040, reciprocating) (OpenAirDocs) - Category: Airplane - Serial number: EA-188 - Airframe hours: 3200 - Engines: Continental TSIO-520-VB 300 horsepower reciprocating - Damage: Substantial damage - Flight: Personal, Part 91 - Registered owner: Marshall B. Segal - Airworthiness certificate: Standard, Utility - Last inspection: Annual, August 10, 1999, 70 hours before - Departed: FMN, FARMINGTON, NM - Destination: 71V - Airport: 71V, Monument Valley, runway 16, 4,000 × ft, asphalt ## Flight crew As NTSB recorded them. NTSB leaves out names. - Pilot; age 59; private; airplane ratings: single-engine land; instrument ratings: airplane; medical: class 3, valid medical--w/ waivers/lim; seat: left; flight hours: 2,242 total, 1,971 in this make and model, 2,100 as pilot in command, 12 in the last 90 days, 10 in the last 30 days, 6 in the last 24 hours ## Weather - Conditions: Visual (VMC), Day - Lowest ceiling: none - Temperature: 61 °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 20000421007119A](https://openairdocs.org/incident/20000421007119A), Apr 21, 2000: Beech A36TC, Monument Valley, UT, No damage. (-23) When landing at Monument Valley arpt, UT: as main gear touched ground a wind lifted the aircraft up and turned it 90 degrees clockwise, carried the… ## Other investigations on N305MM (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 CHI84IA404](https://openairdocs.org/ntsb/CHI84IA404), Sep 24, 1984: Beech A36TC (N305MM), Lafayette, IN, incident, minor damage 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.