DA40 flight school instructor and student reported a dual ECU failure and diversion to nearby airport.
Synopsis
DA40 flight school instructor and student reported a dual ECU failure and diversion to nearby airport.
Narrative
Upon climb from Runway XX in ZZZ; after performing after takeoff checklist at 1;900' MSL heading 180; ECU B annnciation flashed briefly then extinguished to then be illuminated again throughout the duration of the flight. Both myself and Instructor noticed; he took control of the aircraft and I ran the ECU A OR B failure in flight checklist. He called ZZZ Departure and requested direct routing to ZZZ1. After performing the checklist; the ECU B failure persisted and I followed the QRH to then run ENGINE TROUBLESHOOTING IN FLIGHT checklist. That too was to no avail. We were given routing to ZZZ1 and began a climb in the event of engine failure to guarantee landing to ZZZ1 Runway XY. We did not declare an emergency. As we began descent into ZZZ1; ECU A also failed. I then ran the BOTH ECU A AND B FAILURE IN FLIGHT checklist; again to no avail. We landed safely at ZZZ1 with no injuries or further damage to the aircraft. After landing; calling Maintenance; the chief; and Dispatch; we were advised to try to troubleshoot on the ground via QRH for ECU failure on the ground. This time; after running the checklist; it was ECU A that illuminated without B showing failure. According to the checklist with that annunciation still illuminated we are directed to terminate flight. Aircraft is parked and secured at ZZZ1. Thank you for the robust emergency training at our school.
Second reporter narrative
Filled for ZZZZZ and took off Runway XX. After appropriate SOP checklist; approximately 1;900 feet MSL; ECU B annunciation flashed and eventually remained permanent. I immediately took controls and had my student run the appropriate ECU failure checklist while I flew the aircraft and assisted. I continued to climb the aircraft to maintain altitude in case in any emergencies that would be a result of the failure. I talked to Departure and let them know I would like vectors to ZZZ1 due to engine troubleshooting issues. They provided vectors and allowed me to change frequencies. I did not declare an emergency. We proceeded direct ZZZ1. I remained high and let ZZZ1 traffic know our location / altitude / and intentions. ECU B remained and ECU A also annunciated approximately 3.7 NM away from ZZZ1. Proceeded to slip a landing and enter left base / left downwind for XY. ZZZ1 traffic and ZZZ1 facilities were a great help with communication and made sure the issue was resolved and that we were okay. Once landed; called Maintenance / Operations for a brief discussion. Went back to the aircraft to try and resolve ECU issue on the ground and was not able to fix issue.
Source: NASA Aviation Safety Reporting System (public domain). Reports are voluntary submissions and are not verified by NASA.