Incident Description
According to the pilot, while returning from a local flight, the engine experienced a loss of power. During the subsequent forced landing, the aircraft struck power lines. The pilot reported no prior flight control or mechanical problems before the power loss.
Post-Inspection Findings
A visual examination of the fuel tanks revealed a large quantity of dirt. Additionally, the fuel strainer and the carburetor fuel screen both contained dirt. The pilot did not report having completed a preflight inspection before the flight.
Preflight Procedures
The Cessna 172 owner's manual specifies that on the first flight of the day or after refueling, during the exterior inspection of the airplane, the fuel strainer should be drained to clear the fuel system of possible water and sediment. This procedure was not reported as being performed.