Flight Crew Air Transport Pilot (ATP)
Workload; Time Pressure
Aircraft Equipment Problem Less Severe; Deviation / Discrepancy - Procedural Maintenance; Deviation / Discrepancy - Procedural Published Material / Policy
Flight Crew Took Evasive Action; Flight Crew FLC complied w / Automation / Advisory; Flight Crew Diverted; General Maintenance Action
Aircraft; Procedure
From a brief conversation with the MX personnel he ran test and noted that all systems check good. He mentioned to us that the message could have come up as a result of a faulty indicator but was not sure.At Cruise altitude about 30 minutes from landing we were preparing for approach to landing. Preparing landing data and briefing the approach when we received a R BLEED DUCT warning message. We conducted the immediate action checklist. As we finished the checklist from memory; both valves closed within about 10 seconds. At this time we verified our work since it happened so fast to ensure we did the procedure from memory correctly and we had. As this was happening; the cabin was already loosing pressure at a rate of about 4700 FPM. We initiated a descent to 10;000 feet and declared an emergency. As this is happening we simultaneously conducted the immediate action checklist for loss of cabin pressure. Once that checklist was completed and we are making our emergency descent we proceeded to do the QRH for R Bleed Duct. When descending through approximately 20;000 feet the passenger oxygen mask deployed. At the same time we determined that the nearest suitable airport was the departure airport and decided to divert. On the ground we entered the discrepancy for R Bleed Duct warning and for oxygen mask deployed.We conducted the memory items from the immediate action checklist but we do believe that the 30 seconds mentioned in the QRH for the bleed to close was closer to about 5-7 seconds. We were left with no time to react to the situation on hand and made the decision to do an emergency descent based on the loss of cabin pressure.
A CRJ-700 EICAS alerted R BLEED DUCT at cruise altitude. The crew completed the immediate action checklist which closed both bleed valves and depressurized the cabin. The cabin oxygen masks deployed during descent to 10;000 feet and diversion to a nearby airport.