As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
*SUPPLEMENTAL SDR* RT TANK 1400 LBS LESS THAN LT TANK AFTER 1 HOUR CRUISE FLT. SEE PREVIUOS FUEL WRITEUP. CTR TANK FUEL DID NOT INCREASE. REMOVED AND REPLACED CTR RH TANK DEFUEL VALVE IAW UPS B757-200 AMM 28-26-01. DEFUELING VALVE LEAK AND OPS CK GOOD PER MM 28-26-01