As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING TAXI, CREW RECEIVED R ENG BLEED OFF R PACK OFF NO R DUCT PRESSURE. CREW RETURNED TO THE GATE (BTB). MTX TROUBLE SHOT AND REMOVED AND REPLACED PRV CONTROLLER RH ENGINE IAW B767-300 AMM 36-11-19-004-001-002. OPS CHECK GOOD. PERFORMED RH ENG RUN PER AMM 71-00-00 OPS CHECK GOOD . AND RETURNED A/C TO SERVICE.