As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AIRCRAFT WAS GROUNDED: #1 ENGINE COWL ANTI-ICE LIGHT FLICKERING IN CLIMB OUT OF MIA. FLIGHT DECLARED AN EMERGENCY; RETURNED TO MIA LANDING SAFELY. REPLACED #1 ENGINE ANTI ICE PRESSURE SENSOR SWITCH PER AMM 30-21-21. ACCOMPLISHED SATISFACTORY TEST.