As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
LEFT ENG AI COWL VALVE WOULD CYCLE BRIGHT THEN THE LIGHT WOULD GO OUT COMPLETELY. REPLACED NR 1 ENG COWL TAI VALVE PER MM 30 21 11. NR 1 ENG COWL VALVE OPEN LIGHT DIMMER THAN NR 2 IN DIM MODE. REPLACED ENGINE AND WING ANTI ICE PANEL REF MM 30 11 11. PANEL OPS NML REF MM 30 11 41 AND PERFORMED 1&2 ENG RUN ENG ANTI ICE VALVE ANN OFF BRIGHT DIM OPS NML.