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NTSB Report
April 27, 1991 · Donald L Hedeman Sonerai-Ii · N4FD
Jacksonville, FL
Overview
Report Status
Probable Cause
Event Type
Accident
Date
April 27, 1991
Injury Outcomes
1 injury (1 fatality)
Location
Jacksonville, FL
Aircraft
Donald L Hedeman Sonerai-Ii
Tail Number
N4FD
Operator
Millhof Gerald N
Injuries
Fatal
Aircraft Damage
Substantial
NTSB Number
MIA91LA128
WITNESSES STATED ENG DID NOT SOUND AS IF IT WAS PRODUCING FULL POWER ON TAKEOFF. SHORTLY AFTER TAKEOFF THE ENG QUIT. AS THE PLT ATTEMPTED A FORCED LANDING ON AN ALLEY THE ACFT TOUCHED DOWN HARD IN A RIGHT SLIP. THE ACFT THEN BOUNCED INTO THE AIR, TRAVELED 80 FEET, COLLIDED WITH A TELEPHONE POLE, AND CAME TO REST. AFTER THE ACCIDENT A LARGE AMOUNT OF AUTOMOTIVE FUEL LEAKED FROM THE RUPTURED FUEL TANK AND LINES. EXAM OF THE ENG AFTER THE ACCIDENT REVEALED THE SPARK PLUGS, PISTONS, AND CYLINDERS HAD EXCESSIVE BLACK SOOT DEPOSITS. THE CARB IDLE ADJUSTING SCREW WAS STRIPPED AND THE MIXTURE CONTROL SCREW HAD RECENT TOOLING MARKS ON IT. WITNESSES STATED THAT THE ENGINE HAD BEEN OPERATING WITH A RICH FUEL MIXTURE AND THAT THE PILOT HAD BEEN ATTEMPTING TO ADJUST IT TO THE PROPER SETTING.
NTSB Probable Cause
THE PILOT'S IMPROPER ADJUSTMENT OF THE CARBURETOR.
Full Narrative
WITNESSES STATED ENG DID NOT SOUND AS IF IT WAS PRODUCING FULL POWER ON TAKEOFF. SHORTLY AFTER TAKEOFF THE ENG QUIT. AS THE PLT ATTEMPTED A FORCED LANDING ON AN ALLEY THE ACFT TOUCHED DOWN HARD IN A RIGHT SLIP. THE ACFT THEN BOUNCED INTO THE AIR, TRAVELED 80 FEET, COLLIDED WITH A TELEPHONE POLE, AND CAME TO REST. AFTER THE ACCIDENT A LARGE AMOUNT OF AUTOMOTIVE FUEL LEAKED FROM THE RUPTURED FUEL TANK AND LINES. EXAM OF THE ENG AFTER THE ACCIDENT REVEALED THE SPARK PLUGS, PISTONS, AND CYLINDERS HAD EXCESSIVE BLACK SOOT DEPOSITS. THE CARB IDLE ADJUSTING SCREW WAS STRIPPED AND THE MIXTURE CONTROL SCREW HAD RECENT TOOLING MARKS ON IT. WITNESSES STATED THAT THE ENGINE HAD BEEN OPERATING WITH A RICH FUEL MIXTURE AND THAT THE PILOT HAD BEEN ATTEMPTING TO ADJUST IT TO THE PROPER SETTING.
Flight
Event TypeAccident
Event Time12:42 EDT
Nearest AirportCraig Municipal (1nm SW)
Runway23
Runway Length4001 ft
Runway Width100 ft
Flight Plan FiledNone
Aircraft FireNo
Aircraft ExplosionNo
Aircraft
AircraftDonald L Hedeman Sonerai-Ii
Tail NumberN4FD
Aircraft CategoryAir
DamageSubstantial
OperatorMillhof Gerald N
Operating RulePart 91
Engines1
Engine TypeReciprocating
Engine DetailsVolkswagen · 1860 · Reciprocating · 110
Seats1
People & Injuries
Injury Summary1 injury (1 fatality)
Fatal1
Serious0
Minor0
Uninjured0
Total1
Crew 1Age 55 · Third Class
Conditions
ConditionsVMC
LightDaylight
Wind170° @ 7 kt
Visibility7 sm
CeilingBroken clouds 25000 ft
Altimeter29.00 inHg
Observation Time16:46
Weather SourceWFAC