Narrative:

This is the first flight of the day. The aircraft was dispatched with an MEL; the right pack is inop. We were flying at FL240 near ZZZ VOR; and were given instructions by ATC to proceed direct to ZZZZ intersection for the arrival into ZZZ; at this point; the in-range checklist-to-the-line was already completed. The warning message 'left bleed duct' then appeared on the EICAS; we followed standard procedures to cancel and identify; I was in control of the aircraft and have the radio; the captain referenced the epc and QRH; which instructed us to don our oxygen mask and emergency descent to 10;000 ft. We then [advised ATC]; and were given direct to airport; with vectors to final approach for visual runway xxr. Meanwhile the captain continued the procedures; and communicates with the cabin crew and company ops. We landed normally on runway xxr; and exited to the left on taxiway; and came to a complete stop as advised from tower. The firefighters came on frequency and asked if we need to evacuate the aircraft; the captain then called the cabin crew; and we discover that cabin is filled with smoke; and I notice a faint burnt smell; we decided to emergency evacuate. We stayed onboard the aircraft and completed the evacuation and shutdown checklist. The only item we did not do on the emergency evacuation is to arm the APU; right engine and left engine fire squib; because everyone on board was already evacuated; firefighters are already on the scene; and we have no indication of engine fire.

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Original NASA ASRS Text

Title: While preparing to descend to the destination airport; regional jet crew experienced a 'Left Bleed Duct' warning annunciation. An emergency descent was accomplished and direct routing to the destination was facilitated by ATC. Upon landing the Captain elected to evacuate the aircraft due to considerable smoke in the cabin.

Narrative: This is the first flight of the day. The aircraft was dispatched with an MEL; the right PACK is inop. We were flying at FL240 near ZZZ VOR; and were given instructions by ATC to proceed direct to ZZZZ intersection for the arrival into ZZZ; at this point; the in-range checklist-to-the-line was already completed. The warning message 'L Bleed Duct' then appeared on the EICAS; we followed standard procedures to cancel and identify; I was in control of the aircraft and have the radio; the captain referenced the EPC and QRH; which instructed us to don our oxygen mask and emergency descent to 10;000 ft. We then [advised ATC]; and were given direct to airport; with vectors to final approach for visual runway XXR. Meanwhile the captain continued the procedures; and communicates with the cabin crew and company Ops. We landed normally on runway XXR; and exited to the left on taxiway; and came to a complete stop as advised from tower. The firefighters came on frequency and asked if we need to evacuate the aircraft; the captain then called the cabin crew; and we discover that cabin is filled with smoke; and I notice a faint burnt smell; we decided to emergency evacuate. We stayed onboard the aircraft and completed the evacuation and shutdown checklist. The only item we did not do on the emergency evacuation is to arm the APU; R Engine and L Engine fire squib; because everyone on board was already evacuated; firefighters are already on the scene; and we have no indication of engine fire.

Data retrieved from NASA's ASRS site and automatically converted to unabbreviated mixed upper/lowercase text. This report is for informational purposes with no guarantee of accuracy. See NASA's ASRS site for official report.