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NTSB Report
June 12, 1991 · Cessna 172K · N79542
Jacksonville, FL
Overview
Report Status
Probable Cause
Event Type
Accident
Date
June 12, 1991
Injury Outcomes
No injuries (3 uninjured)
Location
Jacksonville, FL
Aircraft
Cessna 172K
Tail Number
N79542
Operator
Sheppard Willie J
Injuries
None
Aircraft Damage
Substantial
NTSB Number
MIA91LA161
DURING CRUISE FLT, THE PLT REPORTED THAT THE ENG RPM DROPPED & THE OIL PRESSURE WAS ZERO. DURING THE DESCENT FOR A FORCED LANDING, THE ENGINE SEIZED. AFTER TOUCHDOWN IN A FIELD, THE ACFT NOSED OVER. EXAM OF THE ENG REVEALED THAT THE OIL COOLER CASE WAS CRACKED DUE TO FATIGUE. THIS ALLOWED THE OIL SUPPLY TO BECOME EXHAUSTED.
NTSB Probable Cause
TOTAL LOSS OF ENGINE POWER DUE TO FATIGUE FAILURE OF THE OIL COOLER RESULTING IN OIL EXHAUSTION. CONTRIBUTING TO THE ACCIDENT WAS LACK OF SUITABLE TERRAIN.
Full Narrative
DURING CRUISE FLT, THE PLT REPORTED THAT THE ENG RPM DROPPED & THE OIL PRESSURE WAS ZERO. DURING THE DESCENT FOR A FORCED LANDING, THE ENGINE SEIZED. AFTER TOUCHDOWN IN A FIELD, THE ACFT NOSED OVER. EXAM OF THE ENG REVEALED THAT THE OIL COOLER CASE WAS CRACKED DUE TO FATIGUE. THIS ALLOWED THE OIL SUPPLY TO BECOME EXHAUSTED.
Flight
Event TypeAccident
Event Time14:15 EDT
Nearest Airport0nm N
Runway0
Flight Plan FiledNone
Aircraft FireNo
Aircraft ExplosionNo
Aircraft
AircraftCessna 172K
Tail NumberN79542
Aircraft CategoryAir
DamageSubstantial
OperatorSheppard Willie J
Operating RulePart 91
Engines1
Engine TypeReciprocating
Engine DetailsLycoming · O-320-E2D · Reciprocating · 150
Seats4
People & Injuries
Injury SummaryNo injuries (3 uninjured)
Fatal0
Serious0
Minor0
Uninjured3
Total3
Crew 1Age 44 · Second Class
Conditions
ConditionsVMC
LightDaylight
WindCalm
Visibility15 sm
CeilingNone
Temperature / Dew Point0 C / 0 C
Altimeter0
Weather SourcePILO