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NTSB Report
July 12, 1993 · Cessna 404 · N37167
Cincinnati, OH
Overview
Report Status
Probable Cause
Event Type
Accident
Date
July 12, 1993
Injury Outcomes
No injuries (8 uninjured)
Location
Cincinnati, OH
Aircraft
Cessna 404
Tail Number
N37167
Operator
Bowman Aviation
Injuries
None
Aircraft Damage
Substantial
NTSB Number
BFO93LA121
WHILE IN CRUISE FLIGHT, THE AIRPLANE'S NUMBER TWO ENGINE FAILED AND CAUGHT FIRE. THE PILOT PUT THE AIRPLANE IN A DIVE AND EXTINGUISHED THE FIRE. THE FLIGHT DIVERTED TO THE NEAREST AIRPORT AND LANDED WITHOUT FURTHER INCIDENT. EXAMINATION OF THE AIRPLANE REVEALED THAT THE FIRE HAD BURNED THROUGH THE ENGINE COWLING AND DAMAGED THE RIGHT WING SPAR. EXAMINATION OF THE ENGINE REVEALED THAT THE NUMBER THREE CYLINDER HAD SEPARATED FROM THE CRANKCASE AND THE ASSOCIATED FUEL INJECTOR LINE WAS DISCONNECTED FROM ITS FITTING. METALLURGICAL EXAMINATIONS OF THE NUMBER THREE CYLINDER COMPONENTS REVEALED THAT THE NUMBER THREE CYLINDER HOLD DOWN BOLTS FAILED DUE TO FATIGUE.
NTSB Probable Cause
THE FAILURE OF A NUMBER THREE ENGINE CYLINDER HOLD DOWN BOLT DUE TO FATIGUE.
Full Narrative
WHILE IN CRUISE FLIGHT, THE AIRPLANE'S NUMBER TWO ENGINE FAILED AND CAUGHT FIRE. THE PILOT PUT THE AIRPLANE IN A DIVE AND EXTINGUISHED THE FIRE. THE FLIGHT DIVERTED TO THE NEAREST AIRPORT AND LANDED WITHOUT FURTHER INCIDENT. EXAMINATION OF THE AIRPLANE REVEALED THAT THE FIRE HAD BURNED THROUGH THE ENGINE COWLING AND DAMAGED THE RIGHT WING SPAR. EXAMINATION OF THE ENGINE REVEALED THAT THE NUMBER THREE CYLINDER HAD SEPARATED FROM THE CRANKCASE AND THE ASSOCIATED FUEL INJECTOR LINE WAS DISCONNECTED FROM ITS FITTING. METALLURGICAL EXAMINATIONS OF THE NUMBER THREE CYLINDER COMPONENTS REVEALED THAT THE NUMBER THREE CYLINDER HOLD DOWN BOLTS FAILED DUE TO FATIGUE.
Flight
Event TypeAccident
Event Time08:20 EDT
Nearest Airport0nm N
Runway0
Flight Plan FiledIFR
Aircraft FireIflt
Aircraft ExplosionNo
Aircraft
AircraftCessna 404
Tail NumberN37167
Aircraft CategoryAir
DamageSubstantial
OperatorBowman Aviation
Operating RulePart 135
Engines2
Engine TypeReciprocating
Engine DetailsContinental · GTSIO-520-M · Reciprocating · 375
Seats10
People & Injuries
Injury SummaryNo injuries (8 uninjured)
Fatal0
Serious0
Minor0
Uninjured8
Total8
Crew 1Age 45 · Second Class
Conditions
ConditionsVMC
LightDaylight
Wind160° @ 5 kt
Visibility10 sm
CeilingNone
Temperature / Dew Point70 F / 0 C
Altimeter0
Weather SourcePILO