What was found
L1 DOOR VERY DIFFICULT TO OPEN. GROUNDED - YES. OPERATED L1 DOOR. CONFIRMED IT IS VERY DIFFICULT TO OPEN. INBOUND CREW SAID IT TOOK 2 FLIGHT ATTENDANTS TO OPEN. APPEARS THE GUIDE ARM ROLLER BINDS IN THE GUIDE PLATES. REPLACED GUIDE ARM ASSY PER AMM 52-11-26. RIG CHECK GOOD. DOOR STILL BINDS AT GUIDE ARM ROLLER. ADDED 1EA WASHER TO UPPER HINGE ARM. READJUSTED GUIDE ARM PER AMM 52-11-00-820-801. VERIFIED DOOR RIG WITHIN LIMITS PER AMM 52-11-00-820-801. DOOR OPS TEST GOOD PER AMM 52-11-00-700-804.