NTSB Identification: BFO85FA041.
The docket is stored on NTSB microfiche number 31879.
Accident occurred Monday, April 29, 1985 in STEVENSVILLE, MD
Aircraft: MOONEY M20F, registration: N9107V
Injuries: 1 Uninjured.

NTSB investigators either traveled in support of this investigation or conducted a significant amount of investigative work without any travel, and used data obtained from various sources to prepare this aircraft accident report.

THE PLT STATED THAT WHEN IN NORMAL CURISE AT 3000 FT OVER CASTLE MARINA ARPT HE NOTICED EXCESSIVE OIL AND CYLINDER HEAD TEMPS. A CONCURRENT SMALL AMOUNT OF SMOKE WAS EMANATING FROM THE INSTRUMENT PANEL WHICH PROMPTED THE PLT TO EXECUTE A PRECAUTIONARY LNDG AT CASTLE MARINA. WHILE TAXIING FROM LDG, THE SMOKE FROM THE INSTRUMENT PANEL THICKENED. THE PLT SHUT DOWN THE SYSTEMS AND ENGINE (WHICH HAD CONTINUED TO RUN NORMALLY), AND EVACUATED THE AIRPLANE. FLAMES THEN ENGULFED AND DESTROYED THE CABIN AREA AND INST PNL. A MECHANIC DISCOVERED A CRACKED OIL PRESSURE GAGE LINE. THIS LINE IS SITUATED ABOVE THE TAIL PIPE AND IS ADJACENT TO A WIRE BUNDLE THAT POWERS THE ENGINE INSTRUMENTS. THE CRACK OCCURRED UNDER THE REDUCTION FITTING NUT, AND METALLURGICAL EXAMINATION REVEALED EVIDENCE OF OVERTIGHTENING.

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

LUBRICATING SYSTEM,OIL LINE..CRACKED

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

LUBRICATING SYSTEM,OIL LINE..OVERTORQUE

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

FLUID,OIL..LEAK

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