What was found
AT TAKEOFF FROM LBE ON AN IFR FLT PLAN EN ROUTE TO RDU. DURING CLIMB, APPROXIMATELY 5 MINUTES AFTER TAKEOFF, THE AIRPLANE’S ALT 1 ANNUNCIATOR ILLUMINATED NR 1 ALTERNATOR FAILED. NOTICED CIRCUIT BREAKER POPPED (ALT 1). NOTIFIED ATC OF NR 1 ALTERNATOR FAILURE. CLEARANCE GIVEN TO FLY DIRECT TO AIRPORT AND ADVISE WHEN AIRPORT IS IN SIGHT. NOTIFIED PAX OF ALTERNATOR FAILURE AND RETURN TO AIRPORT. ONCE TURNING DIRECTLY TO LBE SHUTDOWN ALL UNNECESSARY ELECTRICAL LOADS. ONCE ITEMS TURNED OFF, TURNED ALT 1 SWITCH OFF. BEGAN ABNORMAL CHECKLIST FOR ALTERNATOR FAILURE. RESET ALT 1 CIRCUIT BREAKER AND TURNED ALT 1 SWITCH BACK ON AND ALT 1 CIRCUIT BREAKER POPPING IMMEDIATELY. WITHIN 5 MINUTES HAD AIRPORT IN SIGHT A