MONTEREY, CA, USA
N3824R
BEECH C24R
FIRE ERUPTED IN THE ENG COMPARTMENT DURING THE ENG RUN-UP. INVESTIGAITON REVEALED THAT 7 OF THE 8 NUTS SECURING THE EXHAUST MANIFOLD TO THE CYLINDERS WERE MISSING. THE ONLY NUT PRESENT WAS LOOSE BUT RETAINED THE #1 CYL EXHAUST TUBE. THE #2 CYL EXHAUST TUBE, THOUGH NOT SECURED, WAS IN PLACE. THE #3 & #4 CYL EXHAUST TUBES WERE UNRESTRAINED & HAD DROPPEDDOWN, ALLOWING EXHAUST GASES TO ESCAPE. HEAT DAMAGE ALONG THE LEFT SIDE OF THE ENG WAS MUCH WORSE THAT ON THE RIGHT SIDE, & THE FUEL PUMP FUEL LINE WAS BURNED ENOUGH TO ALLOW FUEL UNDER PRESSURE TO ESCAPE INTO THE ENG COMPARTMENT.
Source: NTSB Aviation Accident Database
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