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ASN Wikibase Occurrence # 177621
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Type:Silhouette image of generic EXEC model; specific model in this crash may look slightly different
Cooke Rotorway Exec
Registration: N319RC
MSN: 3195
Fatalities:Fatalities: 0 / Occupants: 1
Other fatalities:0
Aircraft damage: Substantial
Location:Willis, TX -   United States of America
Phase: Take off
Departure airport:Willis, TX (NONE)
Destination airport:
Investigating agency: NTSB
The 3,200-hour pilot reported that as he lifted the helicopter up to a hover from a boat dock, he started to move the helicopter over the water. Subsequently, the pilot heard a ratcheting sound followed by a partial loss of engine power. The right landing skid and the main rotor blades contacted the dock, and the helicopter came to rest upright in about 4-feet of water, adjacent to the dock. Examination of the engine revealed that the #1 cylinder exhaust valve keeper retaining clip has disengaged. The pilot stated that he had recently sent the #1 cylinder out for maintenance and reinstalled the cylinder approximately 10 hours prior to the flight.
Probable Cause: The partial loss of engine power due to the failure of the #1 cylinder valve retainer clip. A contributing factor was the lack of suitable terrain for the forced landing.




Revision history:

07-Jul-2015 13:30 Noro Added
21-Dec-2016 19:30 ASN Update Bot Updated [Time, Damage, Category, Investigating agency]
07-Dec-2017 18:01 ASN Update Bot Updated [Other fatalities, Departure airport, Source, Narrative]

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