Regional Jet 700 ER/LR (CRJ700)
Flight Crew Air Transport Pilot (ATP); Flight Crew Instrument; Flight Crew Multiengine
Aircraft Equipment Problem Less Severe
Air Traffic Control Issued New Clearance; Flight Crew Requested ATC Assistance / Clarification; Flight Crew Landed As Precaution; Flight Crew Diverted
Aircraft
Prior to the emergency we received the PAX DR OUT HNDL caution message twice in flight which was associated with [a] maintenance write up. Approximately 10-15 minutes later; we received the R BLEED DUCT (warning) message and immediately referenced the QRH. While looking through the QRH an associated BLEED DUCT (caution) message appeared just as the QRH had described. While trying to resolve the BLEED DUCT (caution) message we received the CABIN ALT (caution) message appeared. Shortly after the CABIN ALT (warning) message appeared. We [then] received a CABIN ALT (warning) message [and] immediately donned our oxygen masks and established communications. The First Officer was the pilot flying but transferred the controls to me as the PIC; and he immediately asked ATC for an emergency descent to 10;000 feet. After getting that clearance the PIC flew the plane down as quickly and safely as I could while the First Officer continued to monitor the radios; also made sure that the flight attendants and passengers were okay and were not harmed. We leveled at 10;000 feet and agreed that everything had stabilized so we agreed to stop using oxygen. We agreed that [a nearby alternate] was the nearest airport; we were about 115-120NM (around 20 minutes) away. We requested direct and landed safely; parked at the gate and deplaned passengers normally via main cabin door.
[Report narrative contained no additional information.]
CRJ-700 flight crew reported cabin depressurization related to a pneumatic bleed duct issue led to a diversion.