NTSB Identification: DCA82AA016
Scheduled 14 CFR Part 135: Air Taxi & Commuter
Accident occurred Sunday, February 21, 1982 in PROVIDENCE, RI
Probable Cause Approval Date: 02/21/1983
Aircraft: de Havilland DHC-6, registration: N127PM
Injuries: 1 Fatal,10 Serious,1 Minor.

APRX 15 MIN AFT TKOF, LGT ICG WAS NOTED ON THE WINDSHIELD. THE AIRCREW ACTIVATED THE WINDSHIELD WASHER/DEICE SYS WHICH USED ISOPROPYL ALCOHOL. HOWEVER, ONLY A LITTLE DEICING FLUID WAS NOTED ON EITHER SIDE. THE SYS WAS ACTIVATED AGAIN. AFT HLDG THE SW SVRL SECONDS, THE ODOR OF ALCOHOL WAS NOTED.DEICING PROC WAS STOPPED, BUT SHORTLY THEREAFTER, GRAY-WHITESMOKE BGN COMING FM BLO THE FLOOR. THE AIRCREW BGN DIVERTING. THICK SMOKE FILLED THE CABIN & FIRE BROKE OUT ON THE FLOORBTN THE PLTS AS THE ACFT DSCNDD BLO THE CLDS. THE CO-PLT TRIED TO USE 1 FIRE EXTINGUISHER, BUT IT WAS TOO HOT. NO ONE ATMTD TO USE THE CABIN EXTINGUISHER. CRSH LNDG WAS MADE ON A FRZN LAKE. ALL BUT 1 OCCUPANT WERE EVCUATED BFR THE PLANE WAS DESTROYED BY FIRE. AN INVESTIGATION REVEALED TYGON TUBING WAS USED IN THE DEICE SYS. AFT CONTACT WITH ALCOHOL, THE TUBING HARDENS, BCMS MISHAPED AT CONNECTION POINTS & OFTEN RESULTED IN LEAKS. LEAKS WERE REPAIRED BY RMVG ENDS & REATTACHING. A REPAIR WAS MADE ON 2/18/82 IAW DEHAVILLAND PROC. FIRE EXT LCTNS NOT SUF MARKED OR NOTED ON SEATBACK SAFETY CRDS.

The National Transportation Safety Board determines the probable cause(s) of this accident to be:

MAINTENANCE..INADEQUATE..COMPANY MAINTENANCE PERSONNEL

The National Transportation Safety Board determines the probable cause(s) of this accident to be:

SUPERVISION..INADEQUATE..COMPANY/OPERATOR MANAGEMENT

The National Transportation Safety Board determines the probable cause(s) of this accident to be:

ACFT/EQUIP,INADEQUATE AIRCRAFT COMPONENT..MANUFACTURER

The National Transportation Safety Board determines the probable cause(s) of this accident to be:

ANTI-ICE/DEICE SYSTEM,WINDSHIELD..BRITTLE FRACTURE

The National Transportation Safety Board determines the probable cause(s) of this accident to be:

ANTI-ICE/DEICE SYSTEM,WINDSHIELD..LEAK

The National Transportation Safety Board determines the probable cause(s) of this accident to be:

FUSELAGE,CREW COMPARTMENT..FIRE


Contributing Factors

FUSELAGE,CREW COMPARTMENT..SMOKE


Contributing Factors

FUSELAGE,CABIN..SMOKE


Contributing Factors

INSTRUCTIONS,WRITTEN/VERBAL..INADEQUATE


Contributing Factors

FIRE EXTINGUISHING EQUIPMENT..NOT IDENTIFIED..PASSENGER

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