As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AIRCRAFT WAS GROUNDED. ACCOMPLISHED FIM 28-99-01-610-803, FOUND FUEL TRANSFER FROM RIGHT TANK TO LEFT, 100 LBS WITHIN 5 MINUTES WITH CROSSFEED CLOSED. FOUND BOTH CROSSFEED VALVES LEAKING FROM WING TO CENTER TANK. ACCOMPLISHED AFT CROSSFEED VALVE ALIGNMENT CHECK PER AMM 28-22-02, NO UNWANTED TRANSFER NOTED. (SEE AALA201708089031 FOR FORWARD VALVE)