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April 10, 1988 · Cessna 172XP · N736KG
Walla Walla, WA
Overview
Report Status
Preliminary report
Event Type
Accident
Date
April 10, 1988
Injury Outcomes
No injuries (3 uninjured)
Location
Walla Walla, WA
Aircraft
Cessna 172XP
Tail Number
N736KG
Operator
Tom Acree
Injuries
None
Aircraft Damage
Substantial
NTSB Number
SEA88LA071
DURING DESCENT FOR LANDING THE PILOT NOTED A SURGE COMING FROM THE ENGINE AREA, ACCOMPANIED BY AN INCREASE IN RPM'S. BOTH THE OIL TEMPERATURE AND THE OIL PRESSURE GAUGES WERE READING ZERO. THE CYLINDER HEAD TEMPERATURE HAD REACHED 500 DEGREES AND SMOKE WAS COMING FROM THE ENGINE AREA. THE PILOT THEN SHUT DOWN THE ENGINE. LANDING WAS ACCOMPLISHED ONTO A SOFT COW PASTURE. DURING LANDING ROLL THE AIRCRAFT NOSED OVER INVERTED. METALLURGICAL EXAMINATION REVEALED HEAT DAMAGE AND OVERSTRESS FRACTURES OF THE COMPONENTS EXAMINED. THE OIL PUMP DRIVE KEY WAS FOUND TO HAVE SHEARED.
Full Narrative
DURING DESCENT FOR LANDING THE PILOT NOTED A SURGE COMING FROM THE ENGINE AREA, ACCOMPANIED BY AN INCREASE IN RPM'S. BOTH THE OIL TEMPERATURE AND THE OIL PRESSURE GAUGES WERE READING ZERO. THE CYLINDER HEAD TEMPERATURE HAD REACHED 500 DEGREES AND SMOKE WAS COMING FROM THE ENGINE AREA. THE PILOT THEN SHUT DOWN THE ENGINE. LANDING WAS ACCOMPLISHED ONTO A SOFT COW PASTURE. DURING LANDING ROLL THE AIRCRAFT NOSED OVER INVERTED. METALLURGICAL EXAMINATION REVEALED HEAT DAMAGE AND OVERSTRESS FRACTURES OF THE COMPONENTS EXAMINED. THE OIL PUMP DRIVE KEY WAS FOUND TO HAVE SHEARED.
Flight
Event TypeAccident
Event Time11:10 PDT
Nearest Airport0nm N
Runway0
Flight Plan FiledNone
Aircraft FireNo
Aircraft ExplosionNo
Aircraft
AircraftCessna 172XP
Tail NumberN736KG
Aircraft CategoryAir
DamageSubstantial
OperatorTom Acree
Operating RulePart 91
Engines1
Engine TypeReciprocating
Engine DetailsContinental · IO-360-K · Reciprocating · 195
Seats4
People & Injuries
Injury SummaryNo injuries (3 uninjured)
Fatal0
Serious0
Minor0
Uninjured3
Total3
Crew 1Age 36 · Third Class
Conditions
ConditionsVMC
LightDaylight
WindCalm
Visibility50 sm
CeilingNone
Temperature / Dew Point55 / 0 C
Altimeter30.00 inHg
Weather SourcePILO