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NTSB Report
March 25, 1990 · Kolb Twinstar · N287PH
Halfmoon Bay, CA
Overview
Report Status
Probable Cause
Event Type
Accident
Date
March 25, 1990
Injury Outcomes
2 injuries (2 serious injuries)
Location
Halfmoon Bay, CA
Aircraft
Kolb Twinstar
Tail Number
N287PH
Injuries
Serious
Aircraft Damage
Substantial
NTSB Number
LAX90DUK01
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.
NTSB Probable Cause
FAILURE OF THE PILOT TO MAINTAIN ADEQUATE AIRSPEED AND ALTITUDE.
Full Narrative
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.
Flight
Event TypeAccident
Event Time13:15 PST
Nearest Airport0nm N
Runway0
Runway Length0
Runway Width0
Flight Plan FiledNone
Aircraft FireNo
Aircraft ExplosionNo
Aircraft
AircraftKolb Twinstar
Tail NumberN287PH
Aircraft CategoryAir
DamageSubstantial
Operating RulePart 91
Engines1
Engine TypeReciprocating
Engine DetailsRotax · 503 · Reciprocating · 50
Seats2
People & Injuries
Injury Summary2 injuries (2 serious injuries)
Fatal0
Serious2
Minor0
Uninjured0
Total2
Crew 1Age 37 · None
Conditions
ConditionsVMC
LightDaylight
Wind330° @ 9 kt, gusting 12 kt
Visibility20 sm
CeilingBroken clouds 1200 ft
Temperature / Dew Point50 / 0 C
Altimeter0
Observation Time13:00
Weather SourceWIT