As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FLT#1675, FLL-KIN. AIRCRAFT PERFORMED AN AIR TURN-BACK TO FLL. LEFT WING ANTI ICE FAIL EICAS WHEN CONDUCTING TEST ABOVE 10K FEET. AIR RETURN FLL. DID NOT LAND OVER WEIGHT; REMOVED AND REPLACED WING ANTI-ICE VALVE IAW AMP J30-12-01 LEAK AND OPS OK REQUIRES FUNCTION TEST SEE LOG 4335418 ITEM 1(ACCOMPLISHED GROUND TEST OF L/H WING ANTI-ICE AS PER REF AMP J30-12-00-01AAA-320A-A. NO FAULTS NOTED ON EICAS. A/C OK FOR SERVICE).