As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING C-10 CHECK, EXFOLIATION CORROSION WAS FOUND INBOARD OF R1 DOOR THRESHOLD ON SUPPORT CHANNEL BETWEEN BS 324 AND BS 345. MAINTENANCE REMOVED CORRODED R1 DOOR THRESHOLD SUPPORT CHANNEL FROM BS 324 TO BS 345; FABRICATED A NEW REPLACEMENT SUPPORT CHANNEL; AND INSTALLED REPAIR PART IAW BOEING 757 SRM 51-40-02.