Narrative:

Climbing through approximately FL270 we received a 'cabin' aural warning. No EICAS messages were displayed. The cabin pressure on the EICAS was over 10;000 ft and quickly rising toward 11;000 ft. We confirmed that the cabin was depressurizing and ran the memory items for rapid cabin decompression. We initiated an emergency descent since the cabin altitude continued to climb. Shortly after performing the memory items for the emergency descent I informed ATC that we needed lower and immediately afterward declared an emergency. Cabin pressure was still climbing; so we deployed the passenger oxygen masks. ATC gave us a descent down to 11;000 ft and finally 10;000 ft. During the descent we communicated with the flight attendant that she should make sure everyone had their masks on and that we would be giving an announcement soon. Once we leveled off and cleaned up the aircraft; we ran the rapid cabin decompression checklist; followed by emergency descent checklist. Cabin pressure was now stabilized below 10;000 ft and began to descend. We tried several times to contact a commercial radio service; but were unsuccessful until nearing our divert airport. ATC advised us that the airport was clear and since the cabin pressure was under control; we proceeded to the divert airport. Dispatch later agreed that it was a good diversion point and that we did not have enough fuel to get to our planned destination; and gave us numbers to divert. Passengers were made aware of our situation with frequent updates and the flight attendant kept everybody calm at all times.

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Original NASA ASRS Text

Title: A ERJ145 EICAS alerted 'CABIN' as the cabin climb through 10;000 FT; so the crew declared an emergency at FL270; descended below 10;000 FT; and diverted to an nearby airport.

Narrative: Climbing through approximately FL270 we received a 'CABIN' aural warning. No EICAS messages were displayed. The cabin pressure on the EICAS was over 10;000 FT and quickly rising toward 11;000 FT. We confirmed that the cabin was depressurizing and ran the memory items for rapid cabin decompression. We initiated an emergency descent since the cabin altitude continued to climb. Shortly after performing the memory items for the emergency descent I informed ATC that we needed lower and immediately afterward declared an emergency. Cabin pressure was still climbing; so we deployed the passenger oxygen masks. ATC gave us a descent down to 11;000 FT and finally 10;000 FT. During the descent we communicated with the flight attendant that she should make sure everyone had their masks on and that we would be giving an announcement soon. Once we leveled off and cleaned up the aircraft; we ran the rapid cabin decompression checklist; followed by emergency descent checklist. Cabin pressure was now stabilized below 10;000 FT and began to descend. We tried several times to contact a commercial radio service; but were unsuccessful until nearing our divert airport. ATC advised us that the airport was clear and since the cabin pressure was under control; we proceeded to the divert airport. Dispatch later agreed that it was a good diversion point and that we did not have enough fuel to get to our planned destination; and gave us numbers to divert. Passengers were made aware of our situation with frequent updates and the Flight Attendant kept everybody calm at all times.

Data retrieved from NASA's ASRS site as of April 2012 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.