As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
MCN - MAJOR REPAIR - DURING C-19 CHECK FOUND THE LOWER CENTER SECTION SKIN OF THE LEFT OUTBOARD FORE-FLAP CHAFED AT WBL 298. MAINTENANCE CUT OUT CHAFED SKIN ON LOWER CENTER LT OUTBOARD FORE-FLAP AT WBL 298; FABRICATED NEW SKIN SECTION AND A DOUBLER; BONDED REPAIR PARTS TO FLAP IAW B737-300 51-70-10.