NTSB Identification: MKC87LA096.
The docket is stored on NTSB microfiche number 33981.
Accident occurred Tuesday, April 28, 1987 in GERALD, MO
Probable Cause Approval Date: 05/27/1988
Aircraft: ROTORWAY EXECUTIVE, registration: N4891H
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 STU PIC WAS SOLO ON A X-COUNTRY FLT WHEN THE ENG BACKFIRED. THE STU ENTERED AUTOROTATION WITH LOW ROTOR RPM WHICH ACCELERATED THE DESCENT RATE. THE STU FLARED BEFORE TOUCHDOWN BUT DID NOT LEVEL THE HELO IN TIME TO LAND. THE TAILBOOM STRUCK THE GND AND THE HELO ROTATED ON ITS SIDE. THE STU STATED THAT THE LNDG SITE HE HAD CHOSEN CONSISTED OF SLOPING TERRAIN. THE STU STATED THAT HE FLARED AND THE TAILBOOM STRUCK THE UPSLOPING TERRAIN. THE STU STATED THAT HAD HE LEVELED OFF AT THE APPROPRIATE TIME HE PROBABLY WOULD HAVE BEEN SUCCESSFUL. THE ENG INSP REVEALED THAT THE ENG TIMING BELT HAD SLIPPED, EFFECTIVELY DISABLING THE ENG.

The National Transportation Safety Board determines the probable cause(s) of this accident to be:

IGNITION SYSTEM..LOOSE

The National Transportation Safety Board determines the probable cause(s) of this accident to be:

LEVEL OFF..IMPROPER..PILOT IN COMMAND



Contributing Factors

ROTOR RPM..NOT MAINTAINED..PILOT IN COMMAND


Contributing Factors

REMEDIAL ACTION..DELAYED..PILOT IN COMMAND


Contributing Factors

ENGINE ASSEMBLY..DISABLED

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