Narrative:

Upon takeoff aircraft started making a very loud and rattling noise; it felt as if it was coming from the right side of the airplane. All indications on the EICAS were nominal; but I noticed that the cabin pressure wasn't climbing and the differential pressure was also 0. We were initially instructed to turn 250 and climb to 7;000 ft. After completing the after takeoff checklist I called for QRH-non message cabin pressure and I told ATC we were stopping the climb at 5;000 ft to troubleshoot an issue; we requested vectors and told them we would be returning. First officer read the checklist but I wanted to double-check since it called for the emergency depressurization of the cabin. I gave him the controls and radios and I followed the QRH after advising dispatch and briefing my flight attendants. After about 15 minutes; we were set up and returned for a normal landing. Requested priority handling to the field.

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Original NASA ASRS Text

Title: CRJ-900 Captain reported a return to departure airport after the aircraft failed to pressurize.

Narrative: Upon takeoff aircraft started making a very loud and rattling noise; it felt as if it was coming from the right side of the airplane. All indications on the EICAS were nominal; but I noticed that the cabin pressure wasn't climbing and the differential pressure was also 0. We were initially instructed to turn 250 and climb to 7;000 FT. After completing the After Takeoff checklist I called for QRH-Non Message Cabin Pressure and I told ATC we were stopping the climb at 5;000 FT to troubleshoot an issue; we requested vectors and told them we would be returning. FO read the checklist but I wanted to double-check since it called for the Emergency Depressurization of the cabin. I gave him the controls and radios and I followed the QRH after advising Dispatch and briefing my flight attendants. After about 15 minutes; we were set up and returned for a normal landing. Requested priority handling to the field.

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.