What was found
REF DEFECT #60515379 #1 ENGINE COWL ANTI-ICE VALVE ON @ ROLLOUT. GROUNDED - YES. REMOVED & REPLACED #1 ENG ANTI ICE VLV PER B737-9 AMM 30-21-11-400-801.
As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
REF DEFECT #60515379 #1 ENGINE COWL ANTI-ICE VALVE ON @ ROLLOUT. GROUNDED - YES. REMOVED & REPLACED #1 ENG ANTI ICE VLV PER B737-9 AMM 30-21-11-400-801.