As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
L WING ANTI-ICE VALVE LIGHT REMAINED AMBER AFTER SELECTED ON DURING DESCENT. ASA TC MAX-30EA-24968, W/O 1936398. GROUNDED - YES. C/W INSPECTION OF LH INLET TUBE OF L WING ANTI ICE VALVE. NO DEFECTS NOTED. REF ASA T/C MAX-30EA-24968 AND B737-9 AMM 30-11-11.