What was found
FLT#1926, LGW-BOS. (ETOPS) 'FUEL ACT XFR FAULT WITH 4460 LBS I ACT 1 AND 2 ( AUTO TRANSFER SYSTEM (ACT) 1), 2) ADDITIONAL CENTER TANK(S) (ACT) ); PER AMM 28-51-00-740-801A AND TSM 28-51-00-810-808A SUSPECT FUEL IMPROPERLY FUELED. CHECK SYSTEM OK CLEARED MEL AND MDDR.