As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
CROSSFEED VALVE OPENED, BUT WOULD NOT CLOSE IAW ETOPS REQUIREMENT. EVENTUALLY THE VALVE OPENED AFTER CROSSFEEDING, FUEL TEMP -20 DEGREES. ACFT GROUNDED. IAW AMM 28-22-21, PERFORMED OPS CHECK OF THE FUEL CROSSFEED VALVE IAW AMM 28-22-21. GROUND VERIFICATION CHECKED GOOD.