As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
LEFT ENGINE ANTI-ICE AIR VALVE LIGHT ILUMINATED SHORTLY AFTER TURNING ENGINE ANTI-ICE SWITCH ON. QRH WAS COMPLETED WITH NO CHANGE. MAINTENANCE REPLACED LEFT BLEED AIR AND SHUTOFF VALVE AND LEFT AIR VALVE PN 6058T80P03. GROUND RAN AIRCRAFT FOR 20 MINUTES, ALL WORK DONE IAW GE MM. ALL CHECKS GOOD.