As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
SERVICE DOOR STEP PLATE HAS CORROSION ON THE BOTTOM OF THE PLATE. LOCATED HOLES AND INSTALLED NEW NUTPLATES ON NEW STEP PLATE IAW SRM 51-40-11-001-001-A01, 51-42-06-001-001-A01. DISCARDED UNSERVICEABLE STEP PLATE, REFER TO MWC 81513710, OP 539 FOR REMOVAL AND REINSTALLATION OF STEP PLATE.