As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
TYS - A/C IN FOR A C-CHECK WHEN INSPECTION FOUND THE LOWER AFT CORNER OF THE SERVICE DOOR CUTOUT CORRODED. MAINTENANCE REPAIRED THE LOWER AFT CORNER OF THE SERVICE DOOR CUTOUT BY USING A PIECE OF FRAME 22 MATERIAL. ALL WORK WAS ACCOMPLISHED IAW EC5310-01562. A/C WILL BE RELEASED AT THE END OF THE CHECK.