As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING TAXI OUT, NO AIR OFF OF RIGHT ENGINE AFTER ENGINE START,.A/C RETURNED TO GATE (BTB). MTX GROUNDED A/C MTX PERFORMED FIM 36-11 TREE 837, REMOVED AND REPLACED PRC/PRVC IAW B767 AMM 36-11-19 OPS TEST GOOD A/C RELEASED NO ETOPS. AND RETURNED A/C TO SERVICE.