What was found
ON FLIGHT 3218, CREW REPORTED AFTER PUSH BACK DURING NR 1 ENGINE START PFD NR 1 WENT BLANK. COCKPIT FILLED WITH FUMES AND ELECT SMOKE. EVACUATION PASSENGERS WITHOUT INCIDENT. CFR CALLED. CFR DEPT DISCONNECT BATTERIES AND DID CABIN INSPECTION. AIRCRAFT REMOVED FROM SERVICE. REMOVED AND REPLACED NR 1 CAPTAINS PFD IAW AMM CH 24-34-02 TEST GOOD. CONFIRMED ODOR WAS FROM DISPLAY UNIT AND RECONNECTED BATTERIES IAW AMM CH 24-30-00. AIRCRAFT RETURNED TO SERVICE.