What was found
DURING CRUISE FLIGHT, CREW NOTICED ALL LIGHTS IN COCKPIT, RADAR SCREEN, AND GPS SCREEN WOULD FLASH ON AND OFF EVERY FEW MINUTES. KILOWATTS ON THE NR 1 WOULD SPIKE TO 25 TO 30 KILOWATTS. NR 2 GENERATOR WOULD DO THE SAME THING. BTB ILLUMINATED. COULD NOT BRING NR 2 GEN ON-LINE. DURING DESCENT, CREW WAS AWARE OF STRONG ELEC SMOKE IN COCKPIT. REMOVED AND REPLACED NR 1 AND NR 2 GENERATORS, 3 VOLTAGE REGULATORS. ON NR 2 GEN FOUND FIELD WIRE TERMINALS LOOSE. CHECKED WIRING BEHIND ELEC RACK. FOUND NO DEFECTS. RAN ALL 3 ENG IN-FLIGHT MODE WITH ALL EQUIP ON. NO DEFECTS. NOTED: PERFORMED OPER CHK OF ACFT AC AND DC GEN PER MM 24-20-0, PAGES 501 TO 504. REF OPER CNTRL NR EISA98178, AND, NR 98ZZZX2878.