What was found
DURING HEAVY MAINTENANCE: CORROSION UPPER SURFACE TRAILING EDGE LOWER AREA OF SKINAT LEVEL RIB 15 ON RH WING; REF AE WO # 2025-414/1 NR # 2025-716959 ACCOMPLISHED PERMANENT REPAIR ON RH WING/TOP SKIN PANEL 2 / TEOH LWR SURFACE / RIB 15 I.A.W EA 57-0135-25(COVER PLUS PARTS 1-9) AND AIRBUS RDAF 81709907/003/2025 ISSUE A AND EC NO A26-102-01. AFTER FURTHER INVESTIGATION, AIRBUS FOUND THE CORROSION DAMAGE (PRIOR TO REPAIR) AS LEVEL 3 CORROSION DUE TO THE REMAINING THICKNESS OF THE TOP SKIN OVER THE REAR SPAR CAP BEING -50% AND NOT ABLE TO CARRY LIMIT LOADING WITH THIS REDUCTION- THUS CREATING AN UNSAFE CONDITION.