As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING TAXI WHILE STARTING RH ENGINE START VALVE WILL NOT OPEN, A/C RETURNED TO GATE AND MTX GROUNDED A/C AND DEFERRED RH ENGINE START VALVE IAW MEL ABX 80-11-2-1. AND RETURNED A/C TO SERVICE. NEXT BASE REPLACED RH ENG. START VAL. IAW B767 AMM 80-11-02. OPSCHECK AND LEAK CHECK GOOD. O REACTIVATION PROCEDURES APPLIED PLACARDS REMOVED. A/C REMAINS NO ETOPS