As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
CORROSION ON AFT SIDE OF FRAME FS 517.00 BETWEEN STGR 27 STGR 23L. C-CHECK RO 9/21/2020. BLENDED 7 AREAS ON FRAME FS 517.00 BETWEEN STR 27-STR 23L, REF SRM. REMOVED AND INSTALLED 22 FASTENERS ON FRAME FS 517.00 STR 27-23L, REF SRM. ALL BLENDS IN LIMITS. PRESSURE CHECK GOOD. SEE CONTINUE CARD FOR DETAILS.