Crj-200 captain reported a pressurization problem during climb that resulted in a return to land.

Attributes
ACN	1689658
Time
Date	201910
Local Time Of Day	0001-0600
Place
Locale Reference	ZZZ.Airport
State Reference	US
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Make Model Name	Regional Jet 200 ER/LR (CRJ200)
Operating Under FAR Part	Part 121
Flight Phase	Initial Climb
Flight Plan	IFR
Component
Aircraft Component	Exterior Pax/Crew Door
Person 1
Function	Captain
Qualification	Flight Crew Air Transport Pilot (ATP)
Events
Anomaly	Aircraft Equipment Problem Critical

Narrative:

After takeoff; an extremely loud buffeting noise started. I talked to the flight attendant and could hear it was much louder in the cabin via the interphone. Flight attendant said it was coming from the main cabin door. I told the first officer to level out; we stopped around 6;000 feet. Around that time I noticed the cabin climb rate was 2;500 FPM. I assumed that the door seal had blown. I notified maintenance and dispatch that I would be returning to ZZZ. We landed overweight at about 48.6. Landing was extremely light (greased on). We'll guesstimate 01 FPM. No passengers complained of pressure issues.

Original NASA ASRS Text

Title: CRJ-200 Captain reported a pressurization problem during climb that resulted in a return to land.

Narrative: After takeoff; an extremely loud buffeting noise started. I talked to the Flight Attendant and could hear it was much louder in the cabin via the interphone. Flight Attendant said it was coming from the main cabin door. I told the First Officer to level out; we stopped around 6;000 feet. Around that time I noticed the cabin climb rate was 2;500 FPM. I assumed that the door seal had blown. I notified Maintenance and Dispatch that I would be returning to ZZZ. We landed overweight at about 48.6. Landing was extremely light (greased on). We'll guesstimate 01 FPM. No passengers complained of pressure issues.

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.