NTSB Identification: LAX87LA113.
The docket is stored on NTSB microfiche number 32507.
Accident occurred Sunday, February 08, 1987 in TUCSON, AZ
Probable Cause Approval Date: 03/21/1988
Aircraft: CESSNA 152, registration: N24317
Injuries: 2 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.

DURING A LOCAL DUAL INSTRUCTIONAL FLIGHT, THE PILOT REPORTED THAT THE AIRCRAFT DEVELOPED A VIBRATION AND A SUBSTANTIAL POWER LOSS. THE ACFT WAS FORCED TO LAND OFF THE ARPT IN THE HIGH VEGETATION. EXAMINATION OF THE AIRCRAFT REVEALED THAT THE #3 CYLINDER WAS NOT DEVELOPING COMPRESSION. THE PROPELLER WAS ROTATED AND THE PISTON WOULD NOT RESPOND. THE #3 CYLINDER ASSEMBLY AND PISTON WERE REMOVED AND FOUND THAT THE CONNECTING ROD BEARING WAS BADLY SCORED WITH NO APPARENT LUBRICATION VISIBLE. ONE CONNECTING ROD BOLT WAS FOUND SHEARED. A SAMPLE OF OIL WAS ANALYZED AND FOUND TO CONTAIN A SLIGHTLY HIGH CONTENT OF DIRT. A HIGH CONTENT OF ALUMINUM AND COPPER WERE ALSO NOTED.

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

FLUID,OIL..STARVATION


Contributing Factors

ENGINE ASSEMBLY,CONNECTING ROD..CHAFED


Contributing Factors

TERRAIN CONDITION..HIGH VEGETATION


Contributing Factors

MAINTENANCE,SERVICE OF AIRCRAFT/EQUIPMENT..POOR..COMPANY MAINTENANCE PERSONNEL

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