NTSB Identification: DEN85FTM04.
The docket is stored on NTSB microfiche number 27791.
Accident occurred Saturday, June 29, 1985 in GRAND JUNCTION, CO
Aircraft: KOKES SCORPION 133, registration: N45877
Injuries: 1 Uninjured.
NTSB investigators either traveled in support of this investigation or conducted a significant amount of investigative work without any travel, and used data obtained from various sources to prepare this aircraft accident report.
A GROUP OF PLTS WERE PREPARING FOR AN AIRSHOW FLYBY. AS A FORMATION OF AIRPLANES WERE BEING TAXIED TO RWY 29, THE PLT OF A HOME BUILT SCORPION 133 HELICOPTER, N45877, WAS CLEARED TO AIR TAXI ACROSS RWY 29 & PROCEED TO RWY 22. AS THE HELICOPTER PLT WAS APPROACHING RWY 22 & WAS IN A DESCENDING LEFT TURN, A HOME BUILT AIRPLANE WAS TAKING OFF ON THE SAME RWY (22). TO AVOID A POSSIBLE COLLISION, THE HELICOPTER PLT MADE A HARD LEFT TURN & 'PUSHED IT TO THE GROUND' BETWEEN RWY 22 & THE PARALLEL TAXIWAY. DURING TOUCHDOWN, THE HELICOPTER ROLLED OVER. THE PLT STATED THAT THE LANDING WAS NOT HARD. HE BELIEVED THAT GYROSCOPIC PRECESSION CAUSED THE HELICOPTER TO ROLL OVER.
The National Transportation Safety Board determines the probable cause(s) of this accident to be:AIRCRAFT HANDLING..NOT MAINTAINED..PILOT IN COMMAND
VISUAL LOOKOUT..INADEQUATE..PILOT IN COMMAND
LACK OF RECENT EXPERIENCE IN TYPE OF AIRCRAFT..PILOT IN COMMAND
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