NTSB Identification: LAX90DUK01.
The docket is stored on NTSB microfiche number 42275.
Accident occurred Sunday, March 25, 1990 in HALFMOON BAY, CA
Probable Cause Approval Date: 02/12/1993
Aircraft: Kolb Company TWINSTAR, registration: N287PH
Injuries: 2 Serious.

THE PILOT STATED HE WAS DESCENDING IN A 270 DEGREE RIGHT TURN TO LAND ON TOP OF A HILL WHEN HE LET HIS AIRSPEED DROP TOO MUCH. THE AIRCRAFT COLLIDED WITH THE HILL ON THE UPSLOPE SIDE. THE AIRCRAFT HAD NO REGISTRATION OR AIRWORTHINESS CERTIFICATE. THERE WAS FUEL ON BOARD AT THE TIME AND EVIDENCE INDICATED THE ENGINE WAS OPERATING BEFORE THE ACCIDENT.

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

FAILURE OF THE PILOT TO MAINTAIN ADEQUATE AIRSPEED AND ALTITUDE.

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