NTSB Identification: MKC83LA100.
The docket is stored on NTSB microfiche number 20644.
Accident occurred Wednesday, May 04, 1983 in CAPE GIRARDEAU, MO
Aircraft: CESSNA 172N, registration: N1996E
Injuries: 2 Minor.

NTSB investigators may not have traveled in support of this investigation and used data provided by various sources to prepare this aircraft accident report.

THE PILOTS WERE PARTICIPATING IN A GRAND PRIX AIR RACE. AFTER A NORMAL PREFLIGHT, THEY TOOK OFF & CROSSED OVER THE ARPT FOR RACE TIMING PURPOSES. A CLIMB WAS BEGUN ON COURSE, AND A SHORT TIME LATER, THE ENGINE BEGAN LOOSING POWER. THE AIRCREW TURNED BACK TOWARD THE ARPT, BUT THE ENGINE BEGAN TO RUN ROUGH, THEN QUIT. DURING A FORCED LANDING IN A MUDDY FIELD, THE NOSE GEAR COLLAPSED & THE ACFT STOPPED ABRUPTLY. AN EXAM OF THE ENGINE REVEALED THAT A CONNECTING ROD HAD FAILED & PUNCTURED THE CRANKCASE. BEARING DAMAGE WAS EVIDENT THRU-OUT THE ENGINE REFLECTING LACK OF LUBRICATION. TWO MAGNETO DRIVE CUSHIONS WERE FOUND BLOCKING THE OIL SYS PICK-UP TUBE. THESE WERE IN ADDITION TO THE TWO WHICH WERE PROPERLY INSTALLED IN THE MAGNETO DRIVE SYS. AN OPENING BETWEEN THE ACCESSORY SECTION & THE OIL SUMP WOULD ALLOW THE CUSHIONS TO ENTER THE OIL SUMP.

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

LUBRICATING SYSTEM,OIL TUBING..BLOCKED(PARTIAL)

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..STARVATION

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

ENGINE ASSEMBLY,CONNECTING ROD..FAILURE,TOTAL


Contributing Factors

TERRAIN CONDITION..SOFT


Contributing Factors

TERRAIN CONDITION..WET


Contributing Factors

LANDING GEAR,NOSE GEAR..OVERLOAD

Index for May1983 | Index of months