As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FLIGHT ATTENDANT REPORTS THAT L1 DOOR IS HARD TO OPEN NORMALLY. GROUNDED - YES. CONFIRMED L1 DOOR DIFFICULT TO OPEN FULLY. LUBRICATED L1 DOOR GUIDE TRACK & UPPER HINGE ATTACH POINT. WITH BMS 33 GREASE AS REQUIRED. DOOR OPENS & CLOSES SMOOTHLY WITH NO BINDING OR DIFFICULTY OPENING. REF AMM 52-11-00.