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NTSB Report
December 6, 1989 · Cessna 150D · N4390U
Inyokern, CA
Overview
Report Status
Probable Cause
Event Type
Accident
Date
December 6, 1989
Injury Outcomes
No injuries (1 uninjured)
Location
Inyokern, CA
Aircraft
Cessna 150D
Tail Number
N4390U
Operator
Anderson Aviation
Injuries
None
Aircraft Damage
Substantial
NTSB Number
LAX90LA049
THE PILOT REPORTED THAT HE WAS CONDUCTING AN AERIAL SURVEILLANCE OF HIKING TRAILS FROM ABOUT 200' AGL AND THAT HE WAS USING A SLOW CRUISE POWER SETTING OF 2000 RPM. THE PILOT STATED THAT THE OUTSIDE AIR TEMPERATURE WAS 35 DEGREES FAHRENHEIT AND THE NEAREST WEATHER REPORTING FACILITY LOCATED ABOUT 7 MILES EAST OF THE ACCIDENT SITE REPORTED THE DEW POINT AT 28 DEGREES FAHRENHEIT. AFTER FLYING AT SLOW CRUISE FOR SEVERAL MINUTES, THE AIRCRAFT'S ENGINE LOST POWER AND THE PILOT EXECUTED A FORCED LANDING. THE AIRCRAFT WAS OPERATING IN CONDITIONS CONDUCIVE TO CARBURETOR ICING.
NTSB Probable Cause
THE PILOT'S FAILURE TO USE CARBURETOR HEAT WHEN CLIMATIC CONDITIONS WERE CONDUCIVE TO THE FORMATION OF CARBURETOR ICE.
Full Narrative
THE PILOT REPORTED THAT HE WAS CONDUCTING AN AERIAL SURVEILLANCE OF HIKING TRAILS FROM ABOUT 200' AGL AND THAT HE WAS USING A SLOW CRUISE POWER SETTING OF 2000 RPM. THE PILOT STATED THAT THE OUTSIDE AIR TEMPERATURE WAS 35 DEGREES FAHRENHEIT AND THE NEAREST WEATHER REPORTING FACILITY LOCATED ABOUT 7 MILES EAST OF THE ACCIDENT SITE REPORTED THE DEW POINT AT 28 DEGREES FAHRENHEIT. AFTER FLYING AT SLOW CRUISE FOR SEVERAL MINUTES, THE AIRCRAFT'S ENGINE LOST POWER AND THE PILOT EXECUTED A FORCED LANDING. THE AIRCRAFT WAS OPERATING IN CONDITIONS CONDUCIVE TO CARBURETOR ICING.
Flight
Event TypeAccident
Event Time08:05 PST
Nearest Airport0nm N
Runway0
Runway Length0
Runway Width0
Flight Plan FiledNone
Aircraft FireNo
Aircraft ExplosionNo
Aircraft
AircraftCessna 150D
Tail NumberN4390U
Aircraft CategoryAir
DamageSubstantial
OperatorAnderson Aviation
Operating RulePart 91
Engines1
Engine TypeReciprocating
Engine DetailsContinental · O-200-A · Reciprocating · 100
Seats2
People & Injuries
Injury SummaryNo injuries (1 uninjured)
Fatal0
Serious0
Minor0
Uninjured1
Total1
Crew 1Age 42 · Second Class
Conditions
ConditionsVMC
LightDaylight
WindCalm
Visibility50 sm
CeilingNone
Temperature / Dew Point36 C / 28 C
Altimeter0
Observation Time16:00
Weather SourcePILO