What was found
DURING TAXI OUT, FLT CREW RECEIVED A 'TAIL TANK TRANSFER' FAULT. FLIGHT CREW ELECTED TO RETURN TO GATE FOR MAINTENANCE. A/C RETURNED TO GATE WITHOUT FURTHER INCIDENT AS NOTED ON LOGPAGE NR 87916. MAINTENANCE PERSONNEL UNABLE TO DUPLICATE FAULT. RECYCLED THE TAIL TANK NR 1 FILL VALVE, AND PERFORMED A RETURN TO SERVICE TEST OF FUEL SYSTEM WITH NO FAULTS NOTED. SUSPECT EVENT WAS A SPURIOUS DIGITAL SIGNAL. A/C RETURNED TO SERVICE. (M)