As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING TAXI, RH ENG START VALVE WOULD NOT GO TO COMMANDED POSITION. AIRCRAFT RETURNED TO BLOCKS (BTB). DEFERRED IAW ABX-80-00-2-1. REMOVED AND REPLACED RH ENGINE START VALVE IAW AMM 80-11-02. OPS CHECK GOOD. THIS CLEARS DI. A/C REMAINS NO ETOPS. A/C RETURNED TO SERVICE.