- Date
- June 11, 2018, 07:15 local (13:15 UTC)
- Place
- Cokeville, WY
- Injuries
- 2 uninjured
- Damage
- Substantial damage
- Phase of flight
- Landing
- Aircraft
- N640BEAston Kinsey Tercel
- Defining event
- Landing: Loss of control in flight
- Weather
- Visual (VMC) · Day
- Status
- Completed · report February 5, 2019
- Report
- Approved by Office Director
- NTSB office
- Central Region
- Parties
- Federal Aviation Administration
- FAA report
- 20180611007579A
- Case key
- 97441
From the NTSB’s public API. By law, NTSB reports can’t be used as evidence in lawsuits over the accident.
On this page
Probable cause
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 · 2
NTSB’s coded findings. Those marked are part of the probable cause; the rest are factors or other findings. Under each, the cases with the same finding.
Sequence of events
The events NTSB coded, in order, by phase of flight. The defining event is the one that best describes the accident. Under each, the cases with the same event anywhere in their sequence.
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.
Factual narrative
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.
Aircraft
- Registration
- N640BE
- Reported as
- Aston Kinsey Tercel (NO SERIES)
- Category
- Gyroplane
- Serial number
- T&SG20815S
- Built
- 2015
- Airframe hours
- 130
- Engine
- Rotax 912UL, 125 horsepower, reciprocating
- Damage
- Substantial damage
- Flight
- Personal · Part 91
- Airworthiness certificate
- Special, Experimental light sport (Special)
- Last inspection
- 100 hour · September 14, 2017 · 79 hours before
- Departed
- Cokeville, WY
- Destination
- Cokeville, WY
- Equipment
- Unknown
Matched to the registry by N-number and the event date; the registry’s history has gaps, so older matches can be wrong. Compare the reported make and model.
Flight crew
As NTSB recorded them. NTSB leaves out names.
- Role
- Pilot
- Age
- 42
- Injuries
- None
- Certificate
- Sport Pilot
- Medical
- Sport pilot, Without waivers/limitations
- Last flight review
- February 17, 2018
- Seat
- Right
- Restraint
- 3-point
- Flight hours
- 95 total · 90 in this make and model · 77 as pilot in command · 70 in the last 90 days · 35 in the last 30 days
Weather
- Conditions
- Visual (VMC) · Day
- Wind
- Calm
- Visibility
- 10 statute miles
- Lowest ceiling
- 9,500 ft broken
- Temperature
- 32 °F, dew point 28 °F
- Altimeter
- 30.11 inHg
- Observed at
- AFO, 40 nm away
Docket · 2
The files NTSB released with the investigation on June 21, 2018, on NTSB’s docket system: statements, records, photos and specialists’ reports. 1.5 MB in all.
FAA reports on this event · 1
The FAA’s own accident and incident reports, matched to the aircraft by N-number and date.