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NTSB Report
August 18, 1989 · Beech V35B · N699T
Concord, AR
Overview
Report Status
Probable Cause
Event Type
Accident
Date
August 18, 1989
Injury Outcomes
No injuries (2 uninjured)
Location
Concord, AR
Aircraft
Beech V35B
Tail Number
N699T
Operator
Graebner Walter D
Injuries
None
Aircraft Damage
Substantial
NTSB Number
MKC89LA187
THE PILOT/OWNER SAID THAT WHILE CLIMBING THROUGH 9000 FT MSL FOR 10,000 FT MSL, ON AN IFR FLIGHT PLAN, HE SMELLED AN ELECTRICAL ODOR. THE CABIN BEGAN TO FILL WITH DENSE SMOKE, SO HE SHUT OFF ALL ELECTRICAL SWITCHES. AN EMERGENCY DESCENT WAS MADE. DURING THE DESCENT, THE SMOKE WAS SUBSTANTIALLY CLEARED FROM THE CABIN. THE LANDING GEAR WAS EXTENDED BY USING EMERGENCY PROCEDURES. WHILE LANDING ON ROLLING TERRAIN, THE GEAR COLLAPSED & THE ACFT WAS DAMAGED. THERE WAS NO CONTINUATION OF FIRE ON THE GROUND. A POST-ACDNT INVESTIGATION REVEALED THE OWNER HAD IMPROPERLY INSTALLED AN ALTERNATOR WIRING HARNESS, WHICH RUBBED ON THE NOISE SUPPRESSOR. AFTER IT RUBBED THRU THE INSULATION, AN ELECTRICAL FIRE ERUPTED.
NTSB Probable Cause
IMPROPER INSTALLATION OF THE ALTERNATOR WIRING HARNESS BY THE PILOT/OWNER WHICH RESULTED IN CHAFED WIRING AND A SUBSEQUENT ELECTRICAL FIRE. THE UNEVEN TERRAIN WAS A CONTRIBUTING FACTOR.
Full Narrative
THE PILOT/OWNER SAID THAT WHILE CLIMBING THROUGH 9000 FT MSL FOR 10,000 FT MSL, ON AN IFR FLIGHT PLAN, HE SMELLED AN ELECTRICAL ODOR. THE CABIN BEGAN TO FILL WITH DENSE SMOKE, SO HE SHUT OFF ALL ELECTRICAL SWITCHES. AN EMERGENCY DESCENT WAS MADE. DURING THE DESCENT, THE SMOKE WAS SUBSTANTIALLY CLEARED FROM THE CABIN. THE LANDING GEAR WAS EXTENDED BY USING EMERGENCY PROCEDURES. WHILE LANDING ON ROLLING TERRAIN, THE GEAR COLLAPSED & THE ACFT WAS DAMAGED. THERE WAS NO CONTINUATION OF FIRE ON THE GROUND. A POST-ACDNT INVESTIGATION REVEALED THE OWNER HAD IMPROPERLY INSTALLED AN ALTERNATOR WIRING HARNESS, WHICH RUBBED ON THE NOISE SUPPRESSOR. AFTER IT RUBBED THRU THE INSULATION, AN ELECTRICAL FIRE ERUPTED.
Flight
Event TypeAccident
Event Time14:00 CDT
Nearest Airport0nm N
Runway0
Runway Length0
Runway Width0
Flight Plan FiledIFR
Aircraft FireIflt
Aircraft ExplosionNo
Aircraft
AircraftBeech V35B
Tail NumberN699T
Aircraft CategoryAir
DamageSubstantial
OperatorGraebner Walter D
Operating RulePart 91
Engines1
Engine TypeReciprocating
Engine DetailsContinental · IO-520-B/BA · Reciprocating · 285
Seats4
People & Injuries
Injury SummaryNo injuries (2 uninjured)
Fatal0
Serious0
Minor0
Uninjured2
Total2
Crew 1Age 64 · Second Class
Conditions
ConditionsVMC
LightDaylight
Wind210° @ 5 kt
Visibility5 sm
CeilingBroken clouds 8000 ft
Temperature / Dew Point0 C
Altimeter0
Weather SourcePILO