As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING TAXI OUT STOPPED AND AFTER SETTING BRAKE FOR CROSSBLEED START "RF" APPEARED NEAR RIGHT HYD QUANTITY INDICATOR ON LOWER EICAS A/C RETURNED TO GATE AND MTX GROUNDED A/C . INSPECTED AND VERIFIED NO EXTERNAL HYDRAULIC LEAKS IAW AMM 29-11-00 AND SERVICED RIGHT HAND SYSTEM TO FULL . IAW B 767 AMM 12-12-01 AND A/C DEPARTED.