What was found
(CAN) DURING CLIMB OUT ALL 4 CB`S POPPED FOR TANK 2 FUEL BOOST PUMPS, AIRCRAFT RETURNED TO AIRPORT. DETERMINED NR 3 GENERATOR VOLTAGE FLUCTUATING, (THE PUMP FAULT WAS ATTRIBUTED TO THE POWER FLUCTUATION WHICH WAS POWERING THE (ESSENTIAL POWER) AND THE (SYNC BUSS POWERING THESE PUMPS). INSPECTION OF NR 3 GENERATOR CB FOUND BURNED CONTACTS. CB REPLACED, CONTACTS CLEANED NO FURTHER REPORTS. (TC NR 20070213003)