What was found
FLT#2104, BOS-LGW. (ETOPS) 'PIREP: PERSISTENT FUEL ACT XFR FAULT. ( AUTO TRANSFER SYSTEM (ACT) 1), 2) ADDITIONAL CENTER TANK(S) (ACT). REF TSM 28-46-15, ASM 28-46-01 AND AWM 28-46-19, REMOVED AND REPLACED AFMC (FIN 2QN) IAW 28-51-35 AND HI LVL SNSR ACT1 SEL SW (FIN72QJ1) IAW ESMP 20-45-21. AS A PRECAUTIONARY /T/SHOOTING PER LEADERSHIP REQUEST. TEST OF THE HI LVL SNSRS ACCOMPLISHED IAW 28-46-00, ALL OPS CHK OKAY.