EMB ERJ 145 ER/LR
Flight Crew Air Transport Pilot (ATP); Flight Crew Instrument; Flight Crew Multiengine
Troubleshooting
Aircraft Equipment Problem Critical; Flight Deck / Cabin / Aircraft Event Other / Unknown
General None Reported / Taken
Aircraft; Procedure
I have written the main cabin door on this airplane up four times. The Flight Attendant can't open it with anywhere close to normal force. I had the First Officer and Flight Attendant film the force required to open the door and they couldn't do it. It only opened after I put IMMENSE force on the handle. My hunch the entire time has been that the door gets stuck once we pressurize to high altitude cabin differential of around 7.5 PSID. This is a safety hazard because the door is the primary exit in the event of an emergency. Of the four times this door was forced open after it was written up; two of the write-ups were done with our own aircraft maintenance personnel on board and two I personally forced the door open with almost all of my strength and leverage.The airplane should be ferry flown to a maintenance base and undergo flight testing to determine what is causing the main cabin door to jam itself shut after flight.
Captain reported that the Flight Attendant could not open the main entry door and had written the door up four times with no corrective action.