EMB ERJ 145 ER/LR
Flight Crew Air Transport Pilot (ATP)
Troubleshooting; Workload; Time Pressure; Distraction
Aircraft Equipment Problem Critical
Flight Crew Landed in Emergency Condition; General Maintenance Action
Aircraft
We had PACK 2 Overload and fail at FL250 with PACK 1 already on MEL causing the cabin to rise rapidly. We [advised ATC] to get ATC priority to 10;000 ft. We ran the associated checklists and decided ZZZ was the closest suitable airport. Landed in ZZZ.PACK 2 overload with Pack 1 on MEL.
[Report narrative contained no additional information.]
EMB-145 flight crew reported a loss of cabin pressure due to a PACK 2 failure with PACK 1 on MEL.