NTSB Identification: CHI89LA029.
The docket is stored on NTSB microfiche number 38204.
Accident occurred Monday, November 28, 1988 in FRANKFORT, IL
Probable Cause Approval Date: 11/24/1989
Aircraft: MCDONNELL DOUGLAS 269C, registration: N1098P
Injuries: 1 Minor,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 HELICOPTER EXPERIENCED A TREE STRIKE WITH THE MAIN ROTOR BLADES AND THEN ROLLED OVER WHEN IT STRUCK THE GROUND DURING A PRECAUTIONARY LANDING ATTEMPT. THE HELICOPTER HAD BEEN CONDUCTING CONTRACT POWER LINE PATROL WHEN THE PIC NOTED AN APPARENT PARTIAL POWER LOSS DURING A LOW ALTITUDE, LOW AIRSPEED TURN. THE PIC HAD NOTED ENGINE RPM BETWEEN 2500-2600 WITH NO NEEDLE SPLIT WHEN HE ELECTED TO ATTEMPT THE LANDING. THE ENG OPERATED NORMALLY AFTERWARD.

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

IN-FLIGHT PLANNING/DECISION..POOR..PILOT IN COMMAND

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

AIRCRAFT PERFORMANCE,HELICOPTER HOVER PERFORMANCE..EXCEEDED

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

CLEARANCE..MISJUDGED..PILOT IN COMMAND

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