Tuesday, June 12, 2018

Loss of Control in Flight: Trendak Tercel, N640BE, accident occurred June 11, 2018 in Cokeville, Lincoln County, Wyoming

The National Transportation Safety Board did not travel to the scene of this accident.

Additional Participating Entity: 

Federal Aviation Administration / Flight Standards District Office; Salt Lake City, Utah

Aviation Accident Final Report - National Transportation Safety Board: https://app.ntsb.gov/pdf


Investigation Docket - National Transportation Safety Board: https://dms.ntsb.gov/pubdms


Aviation Accident Data Summary - National Transportation Safety Board: https://app.ntsb.gov/pdf

http://registry.faa.gov/N640BE


Location: Cokeville, WY
Accident Number: CEN18LA219
Date & Time: 06/11/2018, 0715 MDT
Registration: N640BE
Aircraft: ASTON KINSEY TERCEL
Aircraft Damage: Substantial
Defining Event: Loss of control in flight
Injuries: 2 None
Flight Conducted Under: Part 91: General Aviation - Personal

Analysis 

The sport pilot reported that, while performing maneuvers in the gyrocopter south of the private airstrip, he felt no response when he applied left cyclic, and the gyrocopter "was stuck in a moderate right turn." The pilot initiated an emergency descent back to the private airstrip. During the approach, the pilot was unable to regain control of the gyrocopter, and it impacted terrain while sliding to the right. The gyrocopter rolled over and came to rest on its right side. Postaccident examination of the gyrocopter revealed no evidence of preimpact mechanical malfunctions or failures that would have precluded normal operation.

Probable Cause and Findings

The National Transportation Safety Board determines the probable cause(s) of this accident to be:
The loss of gyrocopter control for reasons that could not be determined because postaccident examination of the gyrocopter revealed no mechanical malfunctions or failures that would have precluded normal operation.

Findings

Aircraft
Performance/control parameters - Not attained/maintained (Cause)

Not determined
Not determined - Unknown/Not determined (Cause)

Factual Information 

On June 11, 2018, at 0715 mountain daylight time, an Aston Kinsey Tercel gyrocopter, N640BE, impacted terrain during landing at a private airstrip near Cokeville, Wyoming. The sport pilot and passenger were not injured, and the gyrocopter sustained substantial damage. The gyrocopter was registered and operated by a private individual as a Title 14 Code of Federal Regulations Part 91 personal flight. Visual meteorological conditions prevailed at the time of accident, and a flight plan had not been filed. The local flight departed the private airstrip at 0700.

According to the pilot, while performing maneuvers south of the private airstrip, he felt no response when he applied left cyclic, and the gyrocopter "was stuck in a moderate right turn." The pilot initiated an emergency descent back to the private airstrip. During the approach, the pilot was unable to regain control of the gyrocopter, and it impacted terrain while sliding to the right. The gyrocopter rolled over to the right and came to rest on its right side.

Post accident examination of the gyrocopter by Federal Aviation Administration inspectors revealed the gyrocopter sustained substantial damage to the main rotor blades, fuselage structure, vertical stabilizers, and horizontal stabilizer. A cyclic push/pull tube was fractured consistent with damage sustained during the impact; no additional anomalies were noted with the flight control systems. The examination revealed no evidence of mechanical malfunctions or failures that would have precluded normal operation. 

History of Flight

Maneuvering
Miscellaneous/other

Landing
Off-field or emergency landing
Loss of control in flight (Defining event)
Collision with terr/obj (non-CFIT) 

Pilot Information

Certificate: Sport Pilot
Age: 42, Male
Airplane Rating(s): None
Seat Occupied: Right
Other Aircraft Rating(s): Gyroplane
Restraint Used: 3-point
Instrument Rating(s): None
Second Pilot Present: No
Instructor Rating(s): None
Toxicology Performed:No 
Medical Certification: Sport Pilot Without Waivers/Limitations
Last FAA Medical Exam:
Occupational Pilot: No
Last Flight Review or Equivalent: 02/17/2018
Flight Time: 95 hours (Total, all aircraft), 90 hours (Total, this make and model), 77 hours (Pilot In Command, all aircraft), 70 hours (Last 90 days, all aircraft), 35 hours (Last 30 days, all aircraft) 

Aircraft and Owner/Operator Information

Aircraft Make: ASTON KINSEY
Registration: N640BE
Model/Series: TERCEL NO SERIES
Aircraft Category: Gyroplane
Year of Manufacture: 2015
Amateur Built: Yes
Airworthiness Certificate: Experimental Light Sport
Serial Number: T&SG20815S
Landing Gear Type: Tricycle
Seats: 2
Date/Type of Last Inspection: 09/14/2017, 100 Hour
Certified Max Gross Wt.: 1322 lbs
Time Since Last Inspection: 79 Hours
Engines: 1 Reciprocating
Airframe Total Time: 130 Hours at time of accident
Engine Manufacturer: Rotax
ELT: Not installed
Engine Model/Series: 912UL
Registered Owner: On file
Rated Power: 125 hp
Operator: On file
Operating Certificate(s) Held: None

Meteorological Information and Flight Plan

Conditions at Accident Site: Visual Conditions
Condition of Light: Day
Observation Facility, Elevation: AFO, 6220 ft msl
Distance from Accident Site: 40 Nautical Miles
Observation Time: 0715 MDT
Direction from Accident Site: 360°
Lowest Cloud Condition: Clear
Visibility:  10 Miles
Lowest Ceiling: Broken / 9500 ft agl
Visibility (RVR):
Wind Speed/Gusts: Calm /
Turbulence Type Forecast/Actual: / None
Wind Direction:  
Turbulence Severity Forecast/Actual:
Altimeter Setting: 30.11 inches Hg
Temperature/Dew Point: 0°C / -2°C
Precipitation and Obscuration: No Precipitation
Departure Point: Cokeville, WY
Type of Flight Plan Filed: None
Destination: Cokeville, WY
Type of Clearance: None
Departure Time: 0700 MDT
Type of Airspace: Class E 

Wreckage and Impact Information

Crew Injuries: 1 None
Aircraft Damage: Substantial
Passenger Injuries: 1 None
Aircraft Fire: None
Ground Injuries: N/A
Aircraft Explosion: None
Total Injuries: 2 None
Latitude, Longitude: 42.082778, -110.955278 (est)

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