What was found
RETURNING TO BASE AFTER A PREFLIGHT, ONCE ESTABLISHED ON LOCAL AIRPORT GPS PRACTICE APPROACH, AT A DISTANCE OF ABOUT 5 NM, ANNOUNCED THAT NO AIR COMING OUT OF AFT A/C CABIN BLOWERS. DETECTED AN ELECTRICAL ODOR IN CABIN. TROUBLESHOT BY TURNING A/C OFF & SWITCHED TO FAN & ODOR DISSIPATED. NO SMOKE, FUMES OR INDICATIONS OF FIRE OBSERVED & NORMAL PARAMETERS FROM ENGINE & FLIGHT INSTRUMENTS CONFIRMED, COMPLETED APPROACH & LANDED WITH NO FURTHER ISSUES. TROUBLESHOT A/C SYSTEM, DETERMINED AFT EVAP BLOWER MOTOR WAS INOPERATIVE, & BRUSHES WORN COMPLETELY DOWN. BLOWER MOTOR & CHANGED IAW EC130-200M-1 REV.5. FUNCTIONAL CHECK CONFIRMED PROBLEM FIXED.