As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
GROUND CREW AND F/A'S REPORT THAT THE AFT SERVICE DOOR CANNOT BE OPENED. INVESTIGATION FOUND FWD AND AFT LIFT AND LATCH TORQUE TUBE SUPPORT BEARINGS CORRODED. REPLACED BEARINGS, AND PERFORMED LIFT AND LATCH MECHANISM RIGGING. C/W FUNCTIONAL TEST OF THE AFT SERVICE DOOR IAW AMM TASK 52-41-00-720-801. FUNCTIONAL TEST GOOD.RETURNED TO SERVICE.