ASN Wikibase Occurrence # 287274
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| Date: | Sunday 4 November 2012 |
| Time: | 12:30 LT |
| Type: | Bailey-Moyes Dragonfly C |
| Owner/operator: | Central Ohio Dragonfly Club, LLC |
| Registration: | N667DF |
| MSN: | C-88 |
| Year of manufacture: | 2006 |
| Total airframe hrs: | 367 hours |
| Engine model: | Rotax 582 |
| Fatalities: | Fatalities: 0 / Occupants: 1 |
| Aircraft damage: | Substantial |
| Category: | Accident |
| Location: | Darbyville, Ohio -
 United States of America
|
| Phase: | Initial climb |
| Nature: | Unknown |
| Departure airport: | Darbyville, OH (KPVT) |
| Darbyville, OH (KPVT) | |
| Investigating agency: | NTSB |
| Confidence Rating: |  Accident investigation report completed and information captured |
The accident occurred during an aero-tow of a hang glider. The pilot reported that during initial climb, about 80 feet above the runway, the airplane experienced a sudden and total loss of engine power while it was in a climbing left turn. He stated that the airplane immediately entered an aerodynamic stall/spin following the loss of engine power. The pilot released the towed hang glider, but he was unable recover from the aerodynamic stall condition before the airplane impacted terrain. A postaccident examination of the two-cylinder engine revealed excessive piston scoring within one of the cylinder assemblies and excessive wear on the piston wrist-pin. The observed anomalies were consistent with a cold-seizure event. A cold-seizure event is a thermo-imbalance condition between the piston and cylinder, which results in an insufficient clearance between the piston and the cylinder. The cylinder thermo-imbalance condition is typically the result of an insufficient engine warm-up period before takeoff power is applied. However, the conditions that led to the cold-seizure event may not have been limited to the accident flight. The total loss of engine power during initial climb, while towing a hang glider, likely contributed to the aerodynamic stall/spin encountered at a low altitude. Additionally, the low altitude at which the aerodynamic stall/spin was encountered was likely insufficient to have allowed a recovery before the airplane impacted terrain.
Probable Cause: The total loss of engine power due to a cold-seizure event that occurred at a low altitude, which precluded the pilot's recovery from an inadvertent aerodynamic stall/spin.
Accident investigation:
 |
|
Sources:
NTSB CEN13LA055
Location
Revision history:
| Date/time | Contributor | Updates |
|---|---|---|
| 04-Oct-2022 09:14 | ASN Update Bot | Added |
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