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NTSB Report
May 25, 1990 · Cessna 210A · N6697X
Palm Harbor, FL
Overview
Report Status
Probable Cause
Event Type
Accident
Date
May 25, 1990
Injury Outcomes
No injuries (3 uninjured)
Location
Palm Harbor, FL
Aircraft
Cessna 210A
Tail Number
N6697X
Operator
Heinz Charles D
Injuries
None
Aircraft Damage
Substantial
NTSB Number
MIA90LA133
ACCORDING TO THE PLT, THE FLT DEPARTED AFTER A NORMAL ENG RUN-UP WITH COWL FLAPS OPEN. DURING NORMAL CRUISE FLT, HE LEANED THE MIXTURE TO 50 DEGS RICH OF PEAK, BUT WHILE RETURNING TO LAND, HE OBSERVED THE EGT GAUGE INDICATE PAST THE MAXIMUM RED LINE LIMIT. HE FURTHER STATED THAT THE ENG BEGAN 'FALTERING.' HE PUSHED THE MIXTURE TO FULL RICH, REPOSITIONED THE FUEL SELECTOR, TURNED THE ELECTRIC BOOST PUMP SWITCH TO HIGH, AND REPOSITIONED THE MAG SWITCH FROM BOTH TO LEFT, RIGHT, THEN BACK TO BOTH WITH NEGATIVE RESULTS. AFTER TOUCHDOWN IN A FIELD DURING THE FORCED LANDING, THE ACFT WAS SUBSTANTIALLY DAMAGED. THE ENG OPERATED NORMALLY DURING THE POST-ACCIDENT ENG RUN. EACH MAGNETO WAS CORRECTLY TIMED. THE POSITION OF THE COWL FLAPS AT THE TIME OF DEPARTURE & PRIOR TO THE ENG FAILURE COULD NOT BE VERIFIED.
NTSB Probable Cause
THE IMPROPER LEANING OF THE FUEL/AIR MIXTURE RESULTING IN THE LOSS OF ENGINE POWER DUE TO EXCESSIVE INTERNAL ENGINE TEMPERATURE.
Full Narrative
ACCORDING TO THE PLT, THE FLT DEPARTED AFTER A NORMAL ENG RUN-UP WITH COWL FLAPS OPEN. DURING NORMAL CRUISE FLT, HE LEANED THE MIXTURE TO 50 DEGS RICH OF PEAK, BUT WHILE RETURNING TO LAND, HE OBSERVED THE EGT GAUGE INDICATE PAST THE MAXIMUM RED LINE LIMIT. HE FURTHER STATED THAT THE ENG BEGAN 'FALTERING.' HE PUSHED THE MIXTURE TO FULL RICH, REPOSITIONED THE FUEL SELECTOR, TURNED THE ELECTRIC BOOST PUMP SWITCH TO HIGH, AND REPOSITIONED THE MAG SWITCH FROM BOTH TO LEFT, RIGHT, THEN BACK TO BOTH WITH NEGATIVE RESULTS. AFTER TOUCHDOWN IN A FIELD DURING THE FORCED LANDING, THE ACFT WAS SUBSTANTIALLY DAMAGED. THE ENG OPERATED NORMALLY DURING THE POST-ACCIDENT ENG RUN. EACH MAGNETO WAS CORRECTLY TIMED. THE POSITION OF THE COWL FLAPS AT THE TIME OF DEPARTURE & PRIOR TO THE ENG FAILURE COULD NOT BE VERIFIED.
Flight
Event TypeAccident
Event Time15:05 EDT
Nearest Airport0nm N
Runway0
Runway Length0
Runway Width0
Flight Plan FiledNone
Aircraft FireNo
Aircraft ExplosionNo
Aircraft
AircraftCessna 210A
Tail NumberN6697X
Aircraft CategoryAir
DamageSubstantial
OperatorHeinz Charles D
Operating RulePart 91
Engines1
Engine TypeReciprocating
Engine DetailsContinental · IO-470-E · Reciprocating · 260
Seats4
People & Injuries
Injury SummaryNo injuries (3 uninjured)
Fatal0
Serious0
Minor0
Uninjured3
Total3
Crew 1Age 34 · Second Class
Conditions
ConditionsVMC
LightDaylight
Wind80° @ 10 kt
Visibility7 sm
CeilingNone
Temperature / Dew Point0 C / 0 C
Altimeter0
Observation Time18:50
Weather SourceWFAC