What happened
The pilot was conducting a flight in a Piper PA-32R-300 when the aircraft experienced a complete loss of power during the climb phase. While climbing, the pilot activated the cabin heater. Immediately following this action, the windshield turned black, completely obscuring the view outside. At the same time, the pilot detected a pungent odor inside the cockpit.
In response to the visibility issue, the pilot retarded the throttle. The windshield began to clear as power was reduced. However, when the pilot advanced the throttle again to resume the climb, the engine began to run roughly and then failed to produce any further power. Air traffic control provided radar vectors toward a nearby airport, but the pilot reported being unable to judge his position relative to the destination due to the poor visibility conditions.
Attempting to navigate, the pilot made S-turns which resulted in premature altitude loss. The aircraft subsequently landed short of and parallel to the runway.
The investigation
The aircraft's engine was examined under the supervision of an FAA airworthiness inspector. Initial inspection noted that four spark plugs had been damaged in the area of the electrode. A subsequent teardown inspection revealed that the muffler had exploded, blocking the air induction system. This blockage prevented the engine from receiving necessary airflow, leading to the loss of power.
Findings
The primary factor contributing to the accident was the failure of the muffler, which obstructed the air intake. The pilot's inability to maintain situational awareness due to the obscured windshield further complicated the emergency response.