Incident Overview
A pilot operating an IFR flight from Lancaster, Pennsylvania, encountered multiple instrument failures shortly after departure. The pilot had flown to Lancaster to pick up the best man for his wedding. After filing an IFR flight plan, the pilot departed in IFR conditions.
Sequence of Events
Approximately 15 minutes into the flight, the pilot reported to air traffic control that the horizon indicator had failed but stated an intention to continue to the destination. The controller issued a clearance to climb to 6,000 feet. Shortly after, the pilot commented, "...it's pretty hazy here but I know we're on top but I don't know if I want to go any higher." Subsequently, the pilot reported that the electric compass and turn-and-bank indicator had also failed.
Radar Data
According to radar data, the maximum altitude attained by the aircraft, registration N82718B, was 5,700 feet.
Post-Accident Examination
Post-accident examination of the airplane's vacuum system revealed no evidence of a pre-impact failure.
Toxicology Results
Toxicology tests detected a level of 1.1 mg/kg of antihistamine in the pilot's body.