What was found
IN FLIGHT, WHILE ON APPROACH TO BASE HELIPAD BOTH FRONT AND BACK AIR CONDITIONER BLOWER MOTORS STOPPED WORKING. MED CREW NOTICED A "FUNNY SMELL". CONTINUED TO LAND AND LAND AND PERFORMED NORMAL SHUT DOWN AT HOME BASE WITH NO FURTHER ISSUES. MECHANICS PERFORMED TROUBLESHOOTING OF AC SYSTEM. AFT EVAPORATOR BLOWER MOTOR FAILED CONTRIBUTING TO THE "FUNNY SMELL" AND TRIPPING THE EVAPORATOR BLOWER MOTOR CIRCUIT BREAKER CAUSING ALL BLOWER MOTORS TO CEASE OPERATION IN FLIGHT.