As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
*** WHILE AIRCRAFT WAS OUT OF SERVICE FOR HEAVY CHECK *** LEVEL 2 CORROSION WAS FOUND ON CENTER FUSELAGE 3 UNDER FLOOR FRAME STABILIZER CLIP AT STR18L FR 84. CLIP WAS REPLACED IAW SRM 51-41-01 AND ETD 2019-170-123637. AIRCRAFT REMAINS OUT OF SERVICE FOR HEAVY CHECK COMPLETION.