What was found
DURING TAXI OUT R HYD SYS PRESS, QTY LIGHT, RH FLUID LO STATUS MESSAGE ALL ILLUMINATTED AFTER STARTING THE R ENGINE. R HYD QTY DRAINED TO "O.OO RF".A/C RETURNED TO THE GATE (BTB) AND MTX GROUNDED A/C . LARGE HYD LEAK OVER RIGHT MAIN GEAR ,FOUND ANTISKID MODULE "A" HYD FUSE LEAKING. R&R IAW B767 AMM 32-42-02. SERVICED R HYD SYSTEM FROM 0.20 TO 1.00 IAW AMM 12-12-01. PERFORMED LEAK CHECK AND OPS CHECK. NO LEAKS OR DEFECTS NOTED. A/C OK FOR SERVICE