NTSB Identification: MIA89LA168.
The docket is stored on NTSB microfiche number 39734.
Accident occurred Sunday, June 04, 1989 in GULFPORT, MS
Probable Cause Approval Date: 09/05/1990
Aircraft: BEECH A24R, registration: N9700Q
Injuries: 3 Uninjured.

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

WHILE CRUISING IN VFR CONDS ON AN IFR FLT PLAN, THE ENG FAILED & THE PLT ELECTED TO LAND ON A ROAD. AS HE WAS MAKING AN APCH TO LAND, THE ACFT COLLIDED WITH A POWER LINE & A TREE. AN EXAM OF THE ENG REVEALED THE #2 CONNECTING ROD ASSEMBLY HAD FAILED & THE #2 CYLINDER HAD SUBSEQUENTLY SEPARATED. ACCORDING TO THE ACFT OWNER, THE ACFT HAD PREVIOUSLY BEEN INVOLVED IN A SUDDEN ENG STOPPAGE AFTER THE NOSE GEAR HAD COLLAPSED. THE ENG WAS THEN OVERHAULED. AFTER ABOUT ANOTHER 15 HRS OF OPN, THE NOSE GEAR COLLAPSED AGAIN. SUBSEQUENTLY, A DIE PENETRANT CHECK & RUNOUT OF THE CRANKSHAFT FLANGE WAS MADE. ACCORDING TO THE ENG MANUFACTURER, THE INSTALLED CONNECTING RODS & BEARINGS DID NOT CONFORM TO LYCOMING SVC BULLETING #439, DATED 2/17/79. THE ACFT HAD BEEN OPERATED SOME 200 TO 300 HRS SINCE THE LAST ENG OVERHAUL (FOLLOWING THE 1ST GEAR COLLAPSE).

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

FAILURE OF A #2 CONNECTING ROD ASSEMBLY, WHICH RESULTED IN SEPARATION OF THE #2 CYLINDER AND SUBSEQUENT LOSS OF ENGINE POWER. CONTRIBUTING FACTORS WERE: INADEQUATE MAINTENANCE, THE TRANSMISSION (POWER) LINE, AND TREES.

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