What happened
The pilot reported that the engine lost power approximately 10 miles short of the intended destination. In response to the emergency, the pilot executed a forced landing on a nearby highway. During the rollout phase of the landing, the aircraft struck a road sign, resulting in damage to the airframe.
The investigation
A post-accident examination of the aircraft revealed that the fuel tanks were completely empty. Prior to the incident, the pilot had stopped en route and purchased 5.1 gallons of fuel, which was insufficient for the remaining distance to the destination.
Findings
The primary factor contributing to the accident was fuel exhaustion. The pilot's decision to continue flight with inadequate fuel reserves led to the loss of engine power in flight. The subsequent emergency landing on a highway and impact with a road sign were direct consequences of this mechanical failure due to lack of fuel.