Regional Jet 900 (CRJ900)
Flight Crew Instrument; Flight Crew Multiengine; Flight Crew Air Transport Pilot (ATP)
Situational Awareness
Aircraft Equipment Problem Less Severe; Flight Deck / Cabin / Aircraft Event Smoke / Fire / Fumes / Odor; Ground Event / Encounter Other / Unknown
General Physical Injury / Incapacitation; General Evacuated
Aircraft
After starting the right engine; we received an R RARV FAULT status message. I contacted Maintenance Control; discussed the situation and decided to return to the gate to attempt the system reset. Once at the gate; I again contacted Maintenance Control and we together performed the system reset procedure. At the completion of the procedure and after turning the packs back on; [Flight Attendant 1] reported smoke in the cabin. [Flight Attendant 1] then initiated an evacuation using the main cabin door and jet bridge. The FO (First Officer) and I completed the evacuation checklist. I was initially not aware of any injuries. However; while I was deadheading back to base; I was informed that [Flight Attendant 2] had a bruise on his chest from the event. I was also informed that he had notified in flight management of the injury. I am not aware of any injured passengers.
CRJ-900 Captain reported smoke in the cabin related to an air conditioning pack issue resulting in an evacuation.