As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING FLIGHT, THE CREW REPORTED THE RT AUX PUMP AUTO FUNCTION DID NOT STOP THE PUMP, RT NO AUX TRANSFER ILLUMINATED WHEN PUMP WAS IN AUTO FUNCTION. BETWEEN MX AND OPS, IT WAS DECIDED AN AIR-TURN-BACK WAS THE BEST OPTION. MX INSPECTED THE SYSTEM BUT COULD NOT DUPLICATE THE PROBLEM. MX TRANSFERRED 100 POUNDS OF FUEL WITH NO DISCREPANCIES. THE AC WAS RETURNED TO SERVICE. (K)