As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
NR 1 ENGINE ON START SWITCH CUTOUT BUT START VALVE LIGHT STAYED ON. RAN QRH AND DID NOT RESOLVE. GROUNDED - YES. PER CREW LIGHT EXTINGUISHED ON RETURN TO GATE. GVI OF STARTER & VALVE OK. ACCOMPLISHED ENG. 1 RUN START VALVE LIGHT OPS NORMAL. REF AMM 71-00-00&80-11-01.