What was found
DURING FLIGHT INSPECTION MISSION, LOST GPS UPDATING (HONEYWELL) AND SHORTLY THEREAFTER NOTICED A BURNING ELECTRICAL SMELL. ALL THREE CREW NOTICED THE SMELL. SMELL SOON DISSIPATED. PULLED GPS BREAKER ON AFT BREAKER PANEL AND TURNED OFF MISSION POWER. LANDED UNEVENTFULLY AND WROTE UP DISCREPANCY. IN HANGAR ON GPU POWER, OPERATED ALL ELECTRICAL SYSTEMS. VERIFIED OPERATION OF ALL COOLING FANS IN THE AFIS RACK, IRU BLOWER, AND EFIS BLOWER. FOUND WEAK AIR FLOW TO AFIS CDU. REPAIRED RESTRICTED HOSE. CHECKED ALL COMPONENTS FOR EVIDENCE OF OVERHEATING. FOUND NO FURTHER PROBLEMS. RETURNED AIRCRAFT TO SERVICE.