NTSB Identification: LAX86LA199.
The docket is stored on NTSB microfiche number 31183.
Accident occurred Tuesday, April 29, 1986 in PLACERVILLE, CA
Aircraft: CESSNA 177RG, registration: N34020
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.

WHILE ENROUTE TO SAN FRANCISCO, CA THE ENGINE BEGAN TO OVERSPEED & THE PROP GOV CONTROL WAS NOT EFFECTIVE IN ARRESTING/CONTROLLING THE OVERSPEED CONDITION. SHORTLY THEREAFTER THE ENGINE OIL PRESSURE DEPLETED TO ZERO. THE PILOT ELECTED TO LAND IN THE ICE HOUSE RESERVOIR. THE PLT & PAX WERE RESCUED BY LOCAL BOATERS. EXAMINATION OF THE ENGINE DISCLOSED THE GOVERNOR OIL PRESSURE LINE WAS CHAFFING AGAINST THE ENGINE CRANKCASE AND FRACTURED. THE LINE WAS NOT SECURED WITH CLAMPS AS REQUIRED BY THE AVCO LYCOMING MAINTENANCE MANUAL. A 100-HOUR INSPECTION WAS PERFORMED ON THE ACFT THE DAY BEFORE THE ACCIDENT.

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

MAINTENANCE,100-HOUR INSPECTION..INADEQUATE..COMPANY MAINTENANCE PERSONNEL


Contributing Factors

LUBRICATING SYSTEM,OIL LINE..CHAFED


Contributing Factors

LUBRICATING SYSTEM,OIL LINE..CRACKED

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