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NTSB Report
September 17, 1989 · Aeronca 7AC · N83732
Semmes, AL
Overview
Report Status
Probable Cause
Event Type
Accident
Date
September 17, 1989
Injury Outcomes
No injuries (2 uninjured)
Location
Semmes, AL
Aircraft
Aeronca 7AC
Tail Number
N83732
Injuries
None
Aircraft Damage
Substantial
NTSB Number
ATL89LA215
AFTER AN ANNUAL INSPECTION WAS COMPLETED, THE PILOT ELECTED TO REPLACE A FUEL CAP GASKET THAT HE HAD PREVIOUSLY ORDERED. DURING THE REPLACEMENT, HE NOTICED THAT THE NEW GASKET WAS NOT EXACTLY LIKE THE ORIGINAL, BUT HE THOUGHT IT WOULD BE SATISFACTORY. HE THEN REFUELED THE AIRCRAFT AND MADE SEVERAL TAKEOFFS AND LANDINGS. AFTER ABOUT A 30 MINUTE FLIGHT, A PASSENGER BOARDED THE AIRCRAFT AND THE PILOT TOOK OFF AGAIN. DURING THE INITIAL CLIMB AFTER TAKEOFF, THE ENGINE LOST POWER. THE PILOT MADE AN EMERGENCY LANDING, BUT WAS UNABLE TO STOP THE AIRCRAFT BEFORE IT HIT TREES. AFTER THE ACCIDENT, THE PILOT DISCOVERED THAT THE FUEL CAP VENT HAD BECOME BLOCKED BY THE NEW GASKET. ALSO, HE NOTED THAT DURING THE LANDING SEQUENCE, THE FUEL CAP WAS DISLODGED ENOUGH TO ALLOW AIR BACK IN THE TANK AND THE ENGINE BEGAN RUNNING AGAIN.
NTSB Probable Cause
IMPROPER REPLACEMENT OF THE FUEL CAP GASKET BY THE PILOT, WHICH RESULTED IN A BLOCKED FUEL CAP VENT AND FUEL STARVATION. TREES IN THE EMERGENCY LANDING AREA CONTRIBUTED TO AIRCRAFT DAMAGE.
Full Narrative
AFTER AN ANNUAL INSPECTION WAS COMPLETED, THE PILOT ELECTED TO REPLACE A FUEL CAP GASKET THAT HE HAD PREVIOUSLY ORDERED. DURING THE REPLACEMENT, HE NOTICED THAT THE NEW GASKET WAS NOT EXACTLY LIKE THE ORIGINAL, BUT HE THOUGHT IT WOULD BE SATISFACTORY. HE THEN REFUELED THE AIRCRAFT AND MADE SEVERAL TAKEOFFS AND LANDINGS. AFTER ABOUT A 30 MINUTE FLIGHT, A PASSENGER BOARDED THE AIRCRAFT AND THE PILOT TOOK OFF AGAIN. DURING THE INITIAL CLIMB AFTER TAKEOFF, THE ENGINE LOST POWER. THE PILOT MADE AN EMERGENCY LANDING, BUT WAS UNABLE TO STOP THE AIRCRAFT BEFORE IT HIT TREES. AFTER THE ACCIDENT, THE PILOT DISCOVERED THAT THE FUEL CAP VENT HAD BECOME BLOCKED BY THE NEW GASKET. ALSO, HE NOTED THAT DURING THE LANDING SEQUENCE, THE FUEL CAP WAS DISLODGED ENOUGH TO ALLOW AIR BACK IN THE TANK AND THE ENGINE BEGAN RUNNING AGAIN.
Flight
Event TypeAccident
Event Time18:05 CDT
Nearest AirportGrimes Field (0nm N)
Runway5
Runway Length1800 ft
Runway Width100 ft
Flight Plan FiledNone
Aircraft FireNo
Aircraft ExplosionNo
Aircraft
AircraftAeronca 7AC
Tail NumberN83732
Aircraft CategoryAir
DamageSubstantial
Operating RulePart 91
Engines1
Engine TypeReciprocating
Engine DetailsContinental · C-90-8F · Reciprocating · 90
Seats2
People & Injuries
Injury SummaryNo injuries (2 uninjured)
Fatal0
Serious0
Minor0
Uninjured2
Total2
Crew 1Age 44 · Third Class
Conditions
ConditionsVMC
LightDaylight
Wind320° @ 5 kt
Visibility17 sm
CeilingNone
Temperature / Dew Point0 C
Altimeter0
Weather SourceWIT