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MIA84FA196

1984-06-30 · NICEVILLE, Florida, United States · Serious · 1 aircraft · Status: Completed

Airport FL17

Aircraft involved

Factual narrative

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. Source: NTSB Aviation Accident Database (Pre-2008 Archive) Retrieved: 2026-02-12

Verbatim from NTSB's published report. Source file NTSB_1984_MIA84FA196.txt. Findings + structured fields enriched from FAA avall.mdb. Full investigation docket on data.ntsb.gov ↗.

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