As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
PDX FLIGHT NR 2196: ENGINE ADPT HEAT NR 1 CAUTION ANNC-ON DURING PUSH OUT OF THE GATE. AIRCRAFT RETURNED TO SERVICE. MAINTENANCE PERFORMED OPS TEST OF THE ENGINE AIR INTAKE ANIT-ICING IAW Q400 AMM TASK 30-21-00-710-801. NO DEFECTS NOTED. NO PARTS REPLACED. AIRCRAFT RETURNED TO SERVICE.