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NTSB Report
December 8, 1990 · Beech 23C · N5147M
Dunlap, TN
Overview
Report Status
Probable Cause
Event Type
Accident
Date
December 8, 1990
Injury Outcomes
No injuries (3 uninjured)
Location
Dunlap, TN
Aircraft
Beech 23C
Tail Number
N5147M
Operator
Winchester John L
Injuries
None
Aircraft Damage
Substantial
NTSB Number
ATL91LA027
WHILE CRUISING AT 4000 FEET, THE ENGINE QUIT. THE PILOT ATTEMPTED TO RESTART THE ENGINE, BUT FAILED. THE AIRPLANE CRSHED IN A ROCK PIT WHERE IT SUSTAINED MAJOR STRUCTURAL DAMAGE TO THE UNDERCARRIAGE. FUEL WAS IN BOTH TANKS WHEN EXAMINED AT THE ACCIDENT SITE. THE AIRPLANE EXAMINATION ALSO FAILED TO DISCLOSE ANY MECHANICAL PROBLEM WHICH WOULD HAVE PREVENTED NORMAL OPERATION. THE ENGINE OPERATED NORMALLY DURING THE FUNCTIONAL EXAMINATION. HOWEVER, THE ICING PROBABILITY CURVE INDICATED THE POSSIBILITY OF CARBURETOR ICE FORMATION. THE AIRPLANE WAS EQUIPPED WITH AN OPERATIONAL CARBURETOR HEAT SYSTEM.
NTSB Probable Cause
THE PILOT'S FAILURE TO USE THE CARBURETOR HEAT PROPERLY, WHICH RESULTED IN THE FORMATION OF CARBURETOR ICE, FOLLOWED BY A COMPLETE LOSS OF ENGINE POWER. FACTORS TO THIS ACCIDENT WERE CARBURETOR ICING CONDITIONS AND THE ROUGH AND UNEVEN TERRAIN AT THE CRASH SITE.
Full Narrative
WHILE CRUISING AT 4000 FEET, THE ENGINE QUIT. THE PILOT ATTEMPTED TO RESTART THE ENGINE, BUT FAILED. THE AIRPLANE CRSHED IN A ROCK PIT WHERE IT SUSTAINED MAJOR STRUCTURAL DAMAGE TO THE UNDERCARRIAGE. FUEL WAS IN BOTH TANKS WHEN EXAMINED AT THE ACCIDENT SITE. THE AIRPLANE EXAMINATION ALSO FAILED TO DISCLOSE ANY MECHANICAL PROBLEM WHICH WOULD HAVE PREVENTED NORMAL OPERATION. THE ENGINE OPERATED NORMALLY DURING THE FUNCTIONAL EXAMINATION. HOWEVER, THE ICING PROBABILITY CURVE INDICATED THE POSSIBILITY OF CARBURETOR ICE FORMATION. THE AIRPLANE WAS EQUIPPED WITH AN OPERATIONAL CARBURETOR HEAT SYSTEM.
Flight
Event TypeAccident
Event Time17:23 EST
Nearest Airport0nm N
Runway0
Runway Length0
Runway Width0
Flight Plan FiledIFR
Aircraft FireNo
Aircraft ExplosionNo
Aircraft
AircraftBeech 23C
Tail NumberN5147M
Aircraft CategoryAir
DamageSubstantial
OperatorWinchester John L
Operating RulePart 91
Engines1
Engine TypeReciprocating
Engine DetailsLycoming · O-360-A4K · Reciprocating · 180
Seats4
People & Injuries
Injury SummaryNo injuries (3 uninjured)
Fatal0
Serious0
Minor0
Uninjured3
Total3
Crew 1Age 49 · First Class
Conditions
ConditionsVMC
LightDusk
Wind135° @ 8 kt
Visibility15 sm
CeilingNone
Temperature / Dew Point52 / 12 C
Altimeter0
Observation Time21:52
Weather SourceWFAC