NTSB Identification: ATL83FKJ01
14 CFR Part 91: General Aviation
Accident occurred Wednesday, December 22, 1982 in CLANTON, AL
Probable Cause Approval Date: 12/22/1983
Aircraft: CESSNA 172N, registration: N609CW
Injuries: 1 Fatal.

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 ACFT WAS OBSERVED IN A HIGH SPEED GLIDE TO TOUCH DOWN BRIEFLY IN A PASTURE AT THE TOP OF A KNOLL. IT THEN DROPPED BELOW THE RISE & CRASHED IN A WOODED AREA ADJACENT TO THE PASTURE. EXAMINATION OF THE ENG SHOWED A CRACK EXTENDING FROM THE TOP FORWARD HOLD-DOWN BOLT ON THE RIGHT FRONT CYLINDER THROUGH THE PUSH ROD OPENING TO THE TOP OF THE CRANKCASE. THE TOP FORWARD HOLD-DOWN BOLT WAS SHEARED OFF & CAME LOOSE WHEN TOUCHED. THERE WAS ALSO A CRACK ON THE LEFT SIDE EXTENDING FROM APPROXIMATELY 1 INCH AFT OF THE FRONT CYLINDER HOLD-DOWN BOLT UPWARD BETWEEN THE PUSH ROD HOUSINGS TO THE TOP OF THE CRANKCASE. TEAR DOWN OF THE ENG REVEALED THE OIL PUMP DRIVE GEAR FAILED.

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

LUBRICATING SYSTEM,OIL PRESSURE PUMP..FAILURE,TOTAL

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

FLUID,OIL..STARVATION

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

ENGINE ASSEMBLY,CRANKCASE..CRACKED

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

AIRSPEED..MISJUDGED..PILOT IN COMMAND

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

ALTITUDE..MISJUDGED..PILOT IN COMMAND

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

DISTANCE..MISJUDGED..PILOT IN COMMAND


Contributing Factors

OBJECT..TREE(S)

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