NTSB Identification: MKC83FA084.
The docket is stored on NTSB microfiche number 21851.
Accident occurred Thursday, March 31, 1983 in HIAWATHA, KS
Aircraft: CASSUTT III M SPORT, registration: N1790
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.

WHILE EN ROUTE AT 5500 FT MSL, THE PLT NOTICED AN OIL FILM START TO COVER THE WINDSHIELD OF THE HOME BUILT ACFT. AT THAT TIME, HE WAS APPROACHING HIAWATH, KS, SO HE DIVERTED TO THE HIAWATHA ARPT. BY THE TIME HE ENTERED THE TRAFFIC PATTERN TO LAND, THE OIL RESTRICTED HIS FORWARD VISIBILITY. ON FINAL APPROACH, THE PLT S-TURNED TO KEEP HIMSELF ORIENTED WITH THE RWY. AFTER TOUCHDOWN, THE ACFT VEERED OFF THE RWY & THE GEAR COLLAPSED. AN INVESTIGATION REVEALED THE CRANKSHAFT PLUG, LYCOMING PN STD-1211, WAS LOOSE & DISTORTED, THUS ALLOWING OIL TO EXIT THE ENG AT THE PROPELLER. THE PLT STATED THAT AN OIL LEAK HAD PREVIOUSLLY DEVELOPED. HE SAID A MECHANIC USED A HAMMER TO RESEAT THE PLUG. AN EXAM OF THE PLUG REVEALED AN OFF-CENTERED INDENTATION ON THE PLUG'S FACE & DRIED SILICONE ADHESIVE AROUND ITS OUTER CIRCUMFERENCE.

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

LUBRICATING SYSTEM..LOOSE

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

MAINTENANCE..IMPROPER..OTHER MAINTENANCE PERSONNEL

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

FLUID,OIL..LEAK

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

WINDOW,FLIGHT COMPARTMENT WINDOW/WINDSHIELD..DIRTY(FOGGY)


Contributing Factors

PRECAUTIONARY LANDING..PERFORMED..PILOT IN COMMAND


Contributing Factors

LANDING GEAR..OVERLOAD


Contributing Factors

WEATHER CONDITION..CROSSWIND


Contributing Factors

DIRECTIONAL CONTROL..NOT MAINTAINED..PILOT IN COMMAND


Contributing Factors

GROUND LOOP/SWERVE..UNCONTROLLED..PILOT IN COMMAND


Contributing Factors

VISUAL LOOKOUT..REDUCED

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