What was found
CREW ENTRY DOOR SHOWED CLOSED AND LOCKED WITH HANDLE FULL DOWN AND DOOR LIGHT OUT. AIRCRAFT WOULD NOT PRESSURIZE. RTB, UPON INITAL INSP FOUND ROLLERS ON AFT SIDE OF DOOR NOT IN TRACKS ON THE UPPER AND LOWER TRACK. UNABLE TO OPEN DOOR. AFTER OFF LOAD VISUALLY INSPECTED DOOR AND FOUND AFT LOWER ROLLER OUT OF POSITION. RAISED DOOR HANDLE WITH MINIMAL PRESSURE AND DOOR OPENED. VISUALLY INSPECTED DOOR ROLLERS AND GUIDES NO PROBLEM NOTED. OPENED AND CLOSED DOOR A NUMBER OF TIMES WITH NO NOTICEABLE PROBLEMS OR EXCESS PRESSURE REQUIRED TO CLOSE DOOR.