As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
NR 1 ENGINE START VALVE OPEN LIGHT ILLUMINATED IN FLIGHT AT FL370, PERFORMED QRH. ACFT GROUNDED. TROUBLESHOT NR 1 ENGINE START VALVE. R & R THE START VALVE. OPS & LEAK CHECKED OK IAW AMM 80-10-03 PB 401. GROUND VERIFICATION CHECKED OK.