Flight Crew Air Transport Pilot (ATP)
Aircraft Equipment Problem Critical
Flight Crew Returned To Departure Airport
Aircraft
Operating on the right pack only initially. During the climb out we received a right engine bleed air duct warning message. We ran the QRH. Realized that we would not have any pressurization or air conditioning systems with both PACKs being inoperative so we returned back to ZZZ.We returned due to losing our last PACK which caused us to not have any pressurization or air cooling.
CRJ-700 Captain reported loss of pressurization after takeoff.