NTSB Identification: CHI84LA116.
The docket is stored on NTSB microfiche number 23654.
Accident occurred Wednesday, February 22, 1984 in NEWPORT, MN
Aircraft: NAVION A, registration: N4893K
Injuries: 2 Minor.

NTSB investigators may not have traveled in support of this investigation and used data provided by various sources to prepare this aircraft accident report.

THE ACFT ENGINE FAILED WHEN THE PLT APPLIED CARBURATOR HEAT TO TRY TO 'CURE' A ROUGH RUNNING ENGINE. POST ACCIDENT INVESTIGATION REVEALED A HOLE IN THE LEFT MUFFLER AND SHROUD ALLOWING BURNT EXHAUST GASES TO ENTER THE CARBURETOR WHEN CARBURETOR HEAT WAS APPLIED.

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

EXHAUST SYSTEM,MUFFLER..BURNED

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

EXHAUST SYSTEM,MUFFLER..FAILURE,PARTIAL


Contributing Factors

TERRAIN CONDITION..NONE SUITABLE


Contributing Factors

OBJECT..WIRE,STATIC


Contributing Factors

LOWERING OF FLAPS..NOT PERFORMED..PILOT IN COMMAND


Contributing Factors

CARBURETOR HEAT..SELECTED..PILOT IN COMMAND

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