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NTSB Report
February 27, 1992 · Cessna 150L · N11568
Mulino, OR
Overview
Report Status
Probable Cause
Event Type
Accident
Date
February 27, 1992
Injury Outcomes
No injuries (2 uninjured)
Location
Mulino, OR
Aircraft
Cessna 150L
Tail Number
N11568
Operator
Kay Smith
Injuries
None
Aircraft Damage
Substantial
NTSB Number
SEA92LA052
DURING A PLEASURE FLIGHT, THE AIRPLANE WAS IN CRUISE FLIGHT WHEN THE ENGINE RPM DROPPED. THE PLT APPLIED CARBURETOR HEAT AND THE RPM INCREASED. THE PLT TURNED OFF THE CARBURETOR HEAT AND THE RPM DROPPED. THE PLT CONTINUED TO TURN ON AND OFF THE CARBURETOR HEAT UNTIL THE ENGINE WAS UNABLE TO PRODUCE SUFFICIENT POWER TO MAINTAIN ALTITUDE. THE PILOT INITIATED AN EMERGENCY LANDING IN AN OPEN FIELD WHERE DURING THE LANDING ROLL, THE AIRPLANE NOSED OVER. POST CRASH EXAMINATION OF THE ENGINE DID NOT REVEAL ANY MECHANICAL FAILURES OR MALFUNCTIONS. EXISTING METEOROLOGICAL CONDITIONS AT THE TIME OF THE ACCIDENT WERE WITHIN RANGE OF PROBABLE CARBURETOR ICING CONDITIONS.
NTSB Probable Cause
CARBURETOR ICE AND IMPROPER USE OF THE CARBURETOR HEAT. FACTORS TO THE ACCIDENT WERE: CARBURETOR ICING CONDITIONS AND AN INADEQUATE WEATHER EVALUATION.
Full Narrative
DURING A PLEASURE FLIGHT, THE AIRPLANE WAS IN CRUISE FLIGHT WHEN THE ENGINE RPM DROPPED. THE PLT APPLIED CARBURETOR HEAT AND THE RPM INCREASED. THE PLT TURNED OFF THE CARBURETOR HEAT AND THE RPM DROPPED. THE PLT CONTINUED TO TURN ON AND OFF THE CARBURETOR HEAT UNTIL THE ENGINE WAS UNABLE TO PRODUCE SUFFICIENT POWER TO MAINTAIN ALTITUDE. THE PILOT INITIATED AN EMERGENCY LANDING IN AN OPEN FIELD WHERE DURING THE LANDING ROLL, THE AIRPLANE NOSED OVER. POST CRASH EXAMINATION OF THE ENGINE DID NOT REVEAL ANY MECHANICAL FAILURES OR MALFUNCTIONS. EXISTING METEOROLOGICAL CONDITIONS AT THE TIME OF THE ACCIDENT WERE WITHIN RANGE OF PROBABLE CARBURETOR ICING CONDITIONS.
Flight
Event TypeAccident
Event Time09:00 PST
Nearest Airport0nm N
Runway0
Flight Plan FiledNone
Aircraft FireNo
Aircraft ExplosionNo
Aircraft
AircraftCessna 150L
Tail NumberN11568
Aircraft CategoryAir
DamageSubstantial
OperatorKay Smith
Operating RulePart 91
Engines1
Engine TypeReciprocating
Engine DetailsContinental · O-200 · Reciprocating · 100
Seats2
People & Injuries
Injury SummaryNo injuries (2 uninjured)
Fatal0
Serious0
Minor0
Uninjured2
Total2
Crew 1Age 25 · Third Class
Conditions
ConditionsVMC
LightDaylight
Wind160°
Visibility40 sm
CeilingNone
Temperature / Dew Point61 F / 0 C
Altimeter0
Weather SourcePILO