As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING TAXI AFTER START R ENG BLEED LIGHT DID NOT EXTINGUISH NO DUCT PRESSURE INDICATED. EICAS MESSAGES "R ENG BLLED" AND "R PACK OFF"A/C RETURNED TO THE GATE (BTB) AND MTX GROUNDED A/C MTX PERFORMED GROUND TEST NR 3. IAW AMM 71-00-00 OPS TEST GOOD BOTH PACKS ON AND BLEED LIGHT EXTINGUISHED A/C REMAINS ETOPS 180