What was found
FLT 805 - DEN-SLC - AFTER DEPARTURE FROM DEN THE FLIGHT CREW NOTICED THE COCKPIT INSTRUMENTATION LIGHTING AND INDICATORS STARTED FLICKERING AND READING ERRATIC. THE A/C CROSSTIE LOCKOUT ILLUMINATED, NR 1 GENERATOR TRIPPED OFF LINE AND THE LEFT A/C BUS FAILED. THE APU WAS STARTED AND A/C POWER RESTORED. THE CREW DECLARED AN EMERGENCY AND RETURNED TO DEN. AN UNEVENTFUL LANDING WAS MADE. INVESTIGATION FOUND THE NR 1 GENERATOR NOT PRODUCING VOLTAGE. THE CSD WAS DISCONNECTED AND THE GENERATOR WAS DEFERRED PER THE MEL. THE AIRCRAFT WAS RETURNED TO SERVICE. (M)