What was found
A/C IN PAYLOAD MODE. CTR TANK FUEL 100# AT ENG START. STEADILY INCREASE DURING FLT + 1 HR AFTER T/O 700LBS +2 HRS=1000LBS +3HR+1250LBS CTR TANK. AT ENG. SHUTDOWN 1260 REVERSED MEL 28-28-26-1-1 AFTER REMOVAL AND REPLACEMENT OF CGCC IAW AMM 31-46-11 AND REMOVAL AND REPLACEMENT OF REFUEL/DEFUEL VALVE (11QU) (24QU) LEFT INNER FUEL TANK AND CENTER FUEL TANK ACT. IAW AMM 28-25-12/401 REPLACED RELAY (FIN83QU) AND (FIN 74QU) IAW ESPM 20-46-50 AS A PRECAUTIONARY PER TECH SUPPORT. PERFORMED OPERATIONAL TEST FOR CGCS AS PER AMM 31-46-00 P. BLOCK 501 AND 28-25-08-03C ITEM #30 AND #70 31-46-08-02 ITEM #10 THIS CLEARS CENTER GRAVITY CONTROL SYSTEM DEFERRAL (BC# T3F18E0060807) PLACARD REMOVED.