As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
EN ROUTE FROM PHL TO SFO, CREW REPORTED AN ACT 1 FUEL FAULT TRAPPING 5,200 POUNDS OF FUEL IN THE TANK. FLIGHT DESCENDED TO FL260 IAW QRH. FUEL WAS NOT ENOUGH TO CONTINUE TO SFO, SO THE FLIGHT WAS DIVERTED TO ORD. FLIGHT LANDED WITHOUT INCIDENT. R & R THE 5QH ACTUATOR VLV. R & R 6QH TWIN ACTUATOR. COMPLIED WITH OPERATIONS TEST OF AUTO TRANSFER & PRESS FUEL. OPERATIONS CHECKED GOOD IAW AMM 28-28-53 & 28 28-54.