NTSB Identification: MIA84FA196.
The docket is stored on NTSB microfiche number 25756.
Accident occurred Saturday, June 30, 1984 in NICEVILLE, FL
Aircraft: PIPER PA-32-300, registration: N32538
Injuries: 1 Serious.
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 CRASHED INTO TREES SHORT OF THE RWY AFTER THE ENGINE QUIT ON FINAL APPROACH. THE ENGINE FAILED FROM INTERNAL FAILURE OF THE CRANKSHAFT GEAR RETENTION SYSTEM. A TEARDOWN REVEALED THAT THE CRANKSHAFT GEAR BOLT HAD BACKED OUT & THE BOLT HEAD WAS NOTED TO HAVE CONTACTED THE OIL PUMP DRIVE TANK. ALSO, THERE WAS EVIDENCE THAT FOREIGN MATERIAL HAD PASSED THRU THE GEAR SYS. THE SOURCE OF THE MATERIAL WAS FROM SEVERELY SPALLED TAPPETS. THE CRANKSHAFT GEAR DOWEL PIN WAS SHEARED. SEVERAL CAMSHAFT LOBES WERE WORN WITH CORRESPONDING TAPPET FACE SPALLING. THE INITIAL SOURCE OF THE FAILURE MODE WAS NOT DETERMINED.
The National Transportation Safety Board determines the probable cause(s) of this accident to be:ENGINE ASSEMBLY..UNDETERMINED
The National Transportation Safety Board determines the probable cause(s) of this accident to be:MAINTENANCE..IMPROPER..OTHER MAINTENANCE PERSONNEL
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