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NTSB Report
March 4, 1986 · Beech BE-90 · N861K
Mount Pleasant, TN
Overview
Report Status
Preliminary report
Event Type
Accident
Date
March 4, 1986
Injury Outcomes
No injuries (9 uninjured)
Location
Mount Pleasant, TN
Aircraft
Beech BE-90
Tail Number
N861K
Operator
Stevens Aviation
Injuries
None
Aircraft Damage
Substantial
NTSB Number
ATL86FA085
ON FINAL APPROACH THE CREW TURNED THE AIRCRAFT CABIN ENVIRONMENTAL CONTROL FROM THE AUTO MODE TO THE OFF POSITION. SHORTLY THEREAFTER, THE COCKPIT AND CABIN BEGAN TO FILL WITH SMOKE. THE OCCUPANT OF THE COPILOTS SEAT FELT HEAT AROUND HIS FEET. A NORMAL LANDING WAS MADE AND THE PASSENGERS AND CREW EXITED THE AIRCRAFT WITH OUT INJURY. EXAMINATION SHOWED THAT THE FIBERGLASS DUCTING ON TOP OF THE HEATER PELEUM CHAMBER HAD CAUGHT FIRE. A HOLE WAS BURNED THROUGHT THE PRESSURE BULKHEAD INTO THE AVIONICS COMPARTMENT.
Full Narrative
ON FINAL APPROACH THE CREW TURNED THE AIRCRAFT CABIN ENVIRONMENTAL CONTROL FROM THE AUTO MODE TO THE OFF POSITION. SHORTLY THEREAFTER, THE COCKPIT AND CABIN BEGAN TO FILL WITH SMOKE. THE OCCUPANT OF THE COPILOTS SEAT FELT HEAT AROUND HIS FEET. A NORMAL LANDING WAS MADE AND THE PASSENGERS AND CREW EXITED THE AIRCRAFT WITH OUT INJURY. EXAMINATION SHOWED THAT THE FIBERGLASS DUCTING ON TOP OF THE HEATER PELEUM CHAMBER HAD CAUGHT FIRE. A HOLE WAS BURNED THROUGHT THE PRESSURE BULKHEAD INTO THE AVIONICS COMPARTMENT.
Flight
Event TypeAccident
Event Time07:35 CST
Nearest AirportMaury County Airport (0nm N)
Runway23
Runway Length5003 ft
Runway Width75 ft
Flight Plan FiledIFR
Aircraft FireBoth
Aircraft ExplosionNo
Aircraft
AircraftBeech BE-90
Tail NumberN861K
Aircraft CategoryAir
DamageSubstantial
OperatorStevens Aviation
Operating RulePart 135
Engines2
Engine TypeTurboprop
Engine DetailsP&W · PT6 A-20 · Turboprop · 550
Seats10
People & Injuries
Injury SummaryNo injuries (9 uninjured)
Fatal0
Serious0
Minor0
Uninjured9
Total9
Crew 1Age 38 · First Class
Conditions
ConditionsVMC
LightDaylight
Wind290° @ 6 kt
Visibility5 sm
CeilingOvercast 4000 ft
Temperature / Dew Point39 C / 0 C
Altimeter30.00 inHg
Observation Time12:46
Weather SourceWFAC