As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
MCN - DURING C19 CHECK DISCOVERED LEVEL 2 CORROSION LOCATED ON THE LT AFT LAV FLOOR PAN AT BS 1006 TO BS 1016, WL 208 AND FROM BL 9L TO BL 36L. MAINTENANCE REMOVED AND INSTALLED NEW LAV FLOOR PAN IN THE LT AFT LAV FROM BS 1006 TO BS 1016, WL 208 AND FROM BL 9L TO BL 36L IAW BOEING 737-300 SRM 51-40-02-0G.