What was found
ON A MISSION FROM FAI-HOM, DURING CRUISE, MEDICAL CREW IN AFT OF AIRCRAFT REPORTED SMELL OF ACRID SMOKE. FIGHT WAS DIVERTED TO ANC. MAINTENANCE CHECKED OUT ELECTRICAL SYSTEMS IN AIRCRAFT DUE TO NATURE OF STATED SMELL. THE ONLY SMELL NOTED DURING CHECKS WAS THE CABIN AUX HEATER. SYSTEM WAS RUN FOR ABOUT 10 MINUTES IN HANGAR AND NO FAULTS WERE FOUND. PERFORMED GROUND RUNS TO ENSURE NO BLEED AIR LEAKS WERE PRESENT, AND ALL CHECKED GOOD. AIRCRAFT WAS RELEASED FROM MAINTENANCE AND TAKEN ON A CHECK FLIGHT THAT PRODUCED SATISFACTORY RESULTS. NO SMOKE OR ACRID SMELL WAS PRESENT. AIRCRAFT WAS RETURNED TO SERVICE.