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NTSB Report
March 25, 1991 · Cessna 150M · N704SN
Crystal River, FL
Overview
Report Status
Probable Cause
Event Type
Accident
Date
March 25, 1991
Injury Outcomes
1 injury (1 minor injury), 1 uninjured
Location
Crystal River, FL
Aircraft
Cessna 150M
Tail Number
N704SN
Operator
Crystal River Aero Group
Injuries
Minor
Aircraft Damage
Substantial
NTSB Number
MIA91LA109
THE PILOT STATED THAT WHILE IN CRUISE FLIGHT THE ENGINE OIL PRESSURE STARTED TO DROP FOLLOWED BY A LOSS OF POWER. THE PILOT EXECUTED A FORCED LANDING INTO THE TREES. EXAMINATION REVEALED THAT THE ENGINE OIL SCREEN AND PUMP WERE CONTAMINATED AND DAMAGED BY METAL PARTICLES SIMILAR TO STARTER CLUTCH NEEDLE BEARINGS. THE LAST TIME A CLUTCH WAS REPLACED ON THIS ENGINE WAS BEFORE THE CURRENT OWNER HAD KNOWLEDGE OF IT.
NTSB Probable Cause
THE LOSS OF POWER BECAUSE OF OIL PUMP FAILURE DUE TO CONTAMINATION. UNKNOWN MAINTENANCE PERSONNEL PERFORMED A COMPONENT CHANGE WITHOUT USING APPROPRIATE PUBLICATIONS AND PROCEDURES AND FAILED TO CLEAN CONTAMINANTS FROM THE ENGINE.
Full Narrative
THE PILOT STATED THAT WHILE IN CRUISE FLIGHT THE ENGINE OIL PRESSURE STARTED TO DROP FOLLOWED BY A LOSS OF POWER. THE PILOT EXECUTED A FORCED LANDING INTO THE TREES. EXAMINATION REVEALED THAT THE ENGINE OIL SCREEN AND PUMP WERE CONTAMINATED AND DAMAGED BY METAL PARTICLES SIMILAR TO STARTER CLUTCH NEEDLE BEARINGS. THE LAST TIME A CLUTCH WAS REPLACED ON THIS ENGINE WAS BEFORE THE CURRENT OWNER HAD KNOWLEDGE OF IT.
Flight
Event TypeAccident
Event Time18:09 EST
Nearest AirportCrystal River (1nm E)
Runway0
Flight Plan FiledNone
Aircraft FireNo
Aircraft ExplosionNo
Aircraft
AircraftCessna 150M
Tail NumberN704SN
Aircraft CategoryAir
DamageSubstantial
OperatorCrystal River Aero Group
Operating RulePart 91
Engines1
Engine TypeReciprocating
Engine DetailsContinental · O-200-A · Reciprocating · 100
Seats2
People & Injuries
Injury Summary1 injury (1 minor injury), 1 uninjured
Fatal0
Serious0
Minor1
Uninjured1
Total2
Crew 1Age 25 · Third Class
Conditions
ConditionsVMC
LightDaylight
Wind110° @ 5 kt
Visibility7 sm
CeilingNone
Temperature / Dew Point0 C
Altimeter0
Observation Time22:55
Weather SourceWFAC