Accident Summary
During departure from runway 17, smoke was observed coming from the right engine. The pilot confirmed a loss of power and initiated a right turn back toward the runway, then reported that both engines had been lost. The aircraft subsequently made a landing on rough, rocky terrain approximately 1/4 mile southwest of the runway threshold, sustaining extensive damage. The passenger was seriously injured, and the pilot was killed.
Background
The aircraft had recently changed ownership. During a pre-purchase inspection in Florida, metal particles were found in the oil screens of both engines. The oil was changed and flushed, but metal particles were again found after another engine run. In May 1989, the right engine was replaced with an engine from another aircraft. The aircraft was then flown to Oakland, California, where it was painted and a new interior was installed. A local mechanic noted metal particles in the oil screens of both engines and recommended an oil analysis, but the ferrying pilot refused. After a flight to Hawaii, no oil stain was observed on the fuselage before the flight on September 9, 1989.
Investigation Findings
Examination of the wreckage revealed that both engines failed from detonation. Heavy oil streaks were found behind the right engine, and some streaks of oil were found behind the left engine. The right engine's crankshaft and rod bearing surface measured 0.010 inches under standard, but the rod bearings were of standard size.
Probable Cause
The official probable cause is: Inadequate maintenance, and operation by the pilot with known deficiencies in the aircraft. Factors related to the accident were: excessive wear in both engines, improper use of powerplant controls by the pilot, subsequent overtemperature/detonation in both engines, improper emergency procedures by the pilot (including premature gear extension and/or failure to properly reduce drag on the aircraft after loss of engine power), and the pilot's lack of experience in multi engine and this make and model of aircraft.