A321
Flight Crew Instrument; Flight Crew Multiengine; Flight Crew Air Transport Pilot (ATP)
Situational Awareness
Aircraft Equipment Problem Less Severe
Flight Crew Landed As Precaution; Flight Crew Diverted; General Maintenance Action
Aircraft; Procedure
Coming off the layover we met the inbound plane; Maintenance was already on board saying the previous mechanics improperly complied with a MEL for the avionics cooling. Maintenance signed off their work and we proceeded as normal. On the takeoff roll we received a caution message for a skin air vent fault at around 95 knots. We continued the takeoff and addressed the ECAM (Electronic Centralized Aircraft Monitor) message immediately after completing the 'after take-off' checklist. I was pilot flying and working the radios as the Captain ran the ECAM and QRH follow up. Since the ECAM told us to depressurize the cabin and not exceed 10;000 ft; the decision was made to divert to [a nearby alternate]. At this time we were over are landing weight; but the abnormal situation did not warrant an overweight landing. On our way to [our alternate] we experienced MCDU (Multifunction Control Display unit) Overheat messages followed by the MCDU's blanking out. At one point both MCDUs were blank for a minute or two. Also I remember seeing 'GPS Primary Lost' on the Captain's ND (Navigation Display). Since the problem seemed like it was escalating and we were operating with a degraded form of navigation; the decision was made to divert to [a closer alternate]. Before landing we ran the Overweight Landing checklist and had ARFF (Airport Rescue and Firefighting) standing by in case of a hot brake situation. During all of this we had another company Captain in the jump-seat who was included in the conversation and decision making.
A321 First Officer reported diverting to an alternate airport after experiencing multiple systems failures related to loss of equipment cooling.