As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FLT#623, JFK-LAX. (ETOPS) FUEL ACT TRANSFER FAULT ( AUTO TRANSFER SYSTEM (ACT) 1), 2) ADDITIONAL CENTER TANK(S) (ACT) ); REMOVED AND REPLACED ACT VENT-VALVE ACTUATOR (91QH) IAW AMM 28-28-72. ALL OPS TEST OK. NO FAULTS NOTED. MDDR CLEARED. MX-4 UPDATED. PLACARD REMOVED. MCC NOTIFIED.