What was found
YEG - FLIGHT 2515 - AFTER ENGINE START AND PUSHBACK APU DOOR DISPLAYS 4 AMBER DASHES AND ECU FAIL MESSAGE RECEIVED. RETURNED TO THE GATE. MAINTENANCE REPLACED THE ECU AS A PRECAUTION. AIRCRAFT RETURNED TO SERVICE.
As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
YEG - FLIGHT 2515 - AFTER ENGINE START AND PUSHBACK APU DOOR DISPLAYS 4 AMBER DASHES AND ECU FAIL MESSAGE RECEIVED. RETURNED TO THE GATE. MAINTENANCE REPLACED THE ECU AS A PRECAUTION. AIRCRAFT RETURNED TO SERVICE.