Incident Overview
An aircraft experienced a loss of power on the right engine, prompting the pilot to execute a forced landing. During the landing roll, the aircraft contacted livestock and a fence, and the landing gear collapsed. The pilot, who was the sole occupant, sustained minor injuries.
Pilot Actions
The pilot reported that after feathering the right engine propeller and lowering the landing gear, he observed that the auxiliary hydraulic system pressure gauge indicated zero.
Post-Accident Inspection Findings
A post-accident inspection revealed evidence of an oil leak from the left lower section of the right engine. Subsequent testing determined that the leak originated from the oil cooler pressure line, which had failed due to severe corrosion of the wire braid and deformation of the inner cover.
Auxiliary Hydraulic System
Testing of the auxiliary hydraulic pressure pump disclosed that the 35-ampere current limiter was blown, and 40 amperes were required to drive the pump motor.
Damage and Injuries
The aircraft contacted livestock and a fence, resulting in damage. During the landing roll, the landing gear collapsed. The pilot was slightly injured.