What was found
REFERENCE AIRBORNE/PEMCO N/R 16011.0162 AIRCRAFT WAS NOT GROUNDED AND IS IN CHECK FOR SCHEDULED MX. UPON REMOVING FLOOR PANEL 261LG, FOUND CORROSION ON FLOOR BEAM Y765. REMOVED AND REPLACED FLOORBEAM Y765 IAW A320 SRM 51-72-11, SRM 53-41-14, AMM 53-00-000-801-A01 MX ACTION IS ACCEPTABLE.