Accident Beechcraft C24R N3824R, Friday 25 November 1983

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Date:	Friday 25 November 1983
Time:	21:30 LT
Type:	Beechcraft C24R
Owner/operator:	California Aviation Services
Registration:	N3824R
MSN:	MC 741
Year of manufacture:	1980
Total airframe hrs:	876 hours
Engine model:	Lycoming IO-360-A1B6
Fatalities:	Fatalities: 0 / Occupants: 1
Other fatalities:	0
Aircraft damage:	Substantial
Category:	Accident
Location:	Monterey, CA - United States of America
Phase:	Standing
Nature:	Unknown
Departure airport:
Destination airport:
Investigating agency:	NTSB
Confidence Rating:	Accident investigation report completed and information captured

Narrative:
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.

Probable Cause:

Accident investigation: