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 ,R STARTER CUTOUT AFTER STARTING RIGHT ENGINE.AC RETURNED TO THE GATE (BTB) AND MTX GROUNDED AC . TROUBLE SHOT AND PERFORMED CONTINUITY CHECK OF RH ENG PER WDM 80-11-11 FOUND VLV STUCK ELECTRICALLY, REMOVED AND REPLACED RH ENG STARTER CONTROL VALVE PER AMM 80-11-02. PERF RH ENG RUN PER AMM 71-00-00. OPS OK GOOD. A/C REAMAINS NO ETOPS.AND RETURNED AC TO SERVICE.