What was found
CLT - FLT 799 - SHORTLY AFTER TAKEOFF FROM ORD, EN ROUTE TO CLT, THE NR 1 GENERATOR BUS OFF LIGHT ILLUMINATED. CREW PLACED THE NR 1 GENERATOR BACK ON LINE, WHERE IT STAYED FOR A COUPLE OF MINUTES, BEFORE DROPPING OFF LINE AGAIN. FREQUENCY AND VOLTS WERE NORMAL. CREW STARTED AND USED THE APU. THEN, THE NR 1 GENERATOR OPERATED NORMAL. FLIGHT CONTINUED ONTO CLT. UPON LANDING INTO CLT, THE NR 1 GENERATOR DROPPED OFF LINE AGAIN. THE COCKPIT WENT DARK ON THE LEFT SIDE AND THE CREW WAS UNABLE TO RESTORE ANY POWER. MAINTENANCE FOUND THE NR 1 GENERATOR CONTROL UNIT UNLATCHED AND DISCONNECTED. RESET THE NR 1 GENERATOR CONTROL UNIT. RAN ENGINE. OPERATIONAL CHECK GOOD. (M)