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NTSB Report
April 17, 1993 · Air Tractor AT-401 · N7316L
Fort Pierce, FL
Overview
Report Status
Probable Cause
Event Type
Accident
Date
April 17, 1993
Injury Outcomes
1 injury (1 minor injury)
Location
Fort Pierce, FL
Aircraft
Air Tractor AT-401
Tail Number
N7316L
Operator
Southeastern Aircraft
Injuries
Minor
Aircraft Damage
Destroyed
NTSB Number
MIA93LA104
THE AGRICULTURAL FLIGHT HAD DEPARTED THE AIRSTRIP AND WAS EN ROUTE TO SPRAY A FIELD WHEN THE ENGINE BEGAN TO RUN ROUGH, SMOKE, AND LOSE POWER. THE PILOT ATTEMPTED TO RETURN TO THE AIRSTRIP BUT THE ENGINE DID NOT PRODUCE ADEQUATE POWER. HE INITIATED A FORCED LANDING TO A DRAINAGE DITCH. DURING THE LANDING THE AIRPLANE HIT A SPRINKLER SYSTEM AND BURST INTO FLAMES. THE NO. 2 CYLINDER WAS FOUND TO BE CRACKED ACROSS THE DOME FROM SPARKPLUG HOLE TO SPARKPLUG HOLE. NO RECORDS WERE FOUND TO DETERMINE THE SERVICE HISTORY OF THE CYLINDER.
NTSB Probable Cause
FAILURE OF THE NO. 2 CYLINDER IN FATIGUE FOR UNDETERMINED REASONS, OVER UNSUITABLE TERRAIN. THE LACK OF SUITALE TERRAIN FOR THE FORCED LANDING WAS A FACTOR.
Full Narrative
THE AGRICULTURAL FLIGHT HAD DEPARTED THE AIRSTRIP AND WAS EN ROUTE TO SPRAY A FIELD WHEN THE ENGINE BEGAN TO RUN ROUGH, SMOKE, AND LOSE POWER. THE PILOT ATTEMPTED TO RETURN TO THE AIRSTRIP BUT THE ENGINE DID NOT PRODUCE ADEQUATE POWER. HE INITIATED A FORCED LANDING TO A DRAINAGE DITCH. DURING THE LANDING THE AIRPLANE HIT A SPRINKLER SYSTEM AND BURST INTO FLAMES. THE NO. 2 CYLINDER WAS FOUND TO BE CRACKED ACROSS THE DOME FROM SPARKPLUG HOLE TO SPARKPLUG HOLE. NO RECORDS WERE FOUND TO DETERMINE THE SERVICE HISTORY OF THE CYLINDER.
Flight
Event TypeAccident
Event Time06:53 EDT
Nearest Airport0nm N
Runway0
Flight Plan FiledNone
Aircraft FireGrd
Aircraft ExplosionNo
Aircraft
AircraftAir Tractor AT-401
Tail NumberN7316L
Aircraft CategoryAir
DamageDestroyed
OperatorSoutheastern Aircraft
Operating RulePart 137
Engines1
Engine TypeReciprocating
Engine DetailsP&W · 1340-AN1 · Reciprocating · 600
Seats1
People & Injuries
Injury Summary1 injury (1 minor injury)
Fatal0
Serious0
Minor1
Uninjured0
Total1
Crew 1Age 61 · Second Class
Conditions
ConditionsVMC
LightDaylight
Wind310° @ 5 kt
Visibility10 sm
CeilingNone
Temperature / Dew Point0 C / 0 C
Altimeter29.00 inHg
Observation Time10:55
Weather SourceWFAC