Regional Jet 900 (CRJ900)
Flight Crew Air Transport Pilot (ATP)
Aircraft Equipment Problem Critical
Flight Crew FLC complied w / Automation / Advisory; Flight Crew Overcame Equipment Problem
Aircraft
At FL390 the aircraft had a Left Bleed Air Duct Master Warning. The Captain said 'Cancel; and Identify; I have the Controls and Radios; Reference the QRH for Bleed Air Duct Warning'. The Captain asked for a lower altitude of FL240; initially since we were flying on only one operative Pack. The First Officer referenced the QRH and completed the checklist. The Captain stated that he has had this scenario before; and stated that the other Bleed Air valve will close; we are going to be without pressurization. The flight crew both then donned our quick donning oxygen masks; in anticipation of losing both packs. The First Officer continued the QRH checklist; and the Captain then [advised] ATC and requested to descend down to 10;000 ft. Initially we were assigned a lower altitude of FL240; but the Captain requested 10;000 ft. We initiated an [expedited] descent down to FL240; then were given clearance down to 10;000 ft.; and about that time we lost both packs and pressurization in the aircraft was lost. Soon after we received a Cabin Altitude Warning Message and the oxygen masks were deployed in the cabin. We continued down with the descent and completed the checklists. Once arriving at 10;000 ft. we contacted Dispatch and all agreed to continue on to [destination] as planed at a cruising altitude of 10;000 ft. Before making the decision to continue; we reviewed and calculated all of our performance and fuel calculation; and deemed it was safe to continue on. We landed with 3100 LBS of fuel onboard. We then contacted Dispatch and Maintenance control and wrote up the aircraft.The [manual] should have a procedure where the bleeds are switched on to the operative side as soon as possible manually; to help prevent the working bleed valve from closing. This will help you by still giving you at least one operative pack so the chance of diverting are less; since we are able to operate with one pack at FL250.
CRJ-900 First Officer reported receiving a Left Bleed Air Duct master caution; followed by loss of both packs. An expedited descent was executed; and the flight continued to destination.