NTSB Identification: FTW04LA131.
The docket is stored in the Docket Management System (DMS). Please contact Records Management Division
Accident occurred Saturday, May 15, 2004 in Willis, TX
Probable Cause Approval Date: 10/28/2004
Aircraft: Cooke Rotorway Exec, registration: N319RC
Injuries: 1 Uninjured.
NTSB investigators may not have traveled in support of this investigation and used data provided by various sources to prepare this aircraft accident report.
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.
The National Transportation Safety Board determines the probable cause(s) of this accident to be: 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. Full narrative available
Index for May2004 | Index of months