Narrative:

Approximately 10-15 minutes after leveling off at FL300; I noticed the cabin altitude was at 8;700 ft and slowly climbing; 100 ft every 5-10 seconds. We accomplished the cabin altitude hi checklist; [advised] ATC; and descended to 10;000 ft. At 10;000; the pressurization seemed to work fine. We never lost pressurization and the highest the cabin altitude got to was 10;100. After contacting dispatch; we decided to continue to [destination] at 10;000 ft. We told ATC we had the problem under control and that we would like to continue. We had no further problems. Pack 1 had been just deferred prior to this flight.

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Original NASA ASRS Text

Title: ERJ-170 flight crew reported descending to an appropriate altitude when their pressurization system malfunctioned.

Narrative: Approximately 10-15 minutes after leveling off at FL300; I noticed the cabin altitude was at 8;700 ft and slowly climbing; 100 ft every 5-10 seconds. We accomplished the cabin altitude hi checklist; [advised] ATC; and descended to 10;000 ft. At 10;000; the pressurization seemed to work fine. We never lost pressurization and the highest the cabin altitude got to was 10;100. After contacting dispatch; we decided to continue to [destination] at 10;000 ft. We told ATC we had the problem under control and that we would like to continue. We had no further problems. Pack 1 had been just deferred prior to this flight.

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.