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 CROSSBEAM UPPER FLANGE AT FR 87 AND RBL 12. CROSSBEAM WAS REPAIRED IAW ETD2019-170-124120. AIRCRAFT REMAINS OUT OF SERVICE FOR HEAVY CHECK COMPLETION.