As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FLIGHT NR 8960 FROM PIT TO CLE. IN ROUTE, AIRCREW RECEIVED THE LT AIR VALVE LIGHT, LIGHT WAS ON AND STEADY. AIRCREW RETURNED TO PIT. WHEN MAINT. GOT TO THE A/C THEY FOUND THE LT ANTI-ICE START BLEED VALVE WAS BAD. REMOVED AND REPLACED VALVE A/C RETURNED TO SERVICE WITH NO FURTHER INCIDENT.