What was found
DURING HEAVY MAINTENANCE: CORROSION UPPER SURFACE OF TOP SKIN BTW RIB19 AND RIB20 AT FRONT SPAR DATUM ON LH WING; REF TO AEROMAN WO 2023 364/1 NR 2023-682713, PERFORMED PERMANENT REPAIR ON UPPER SURFACE TOP SKIN PANEL 2 FRONT SPAR AT RIBS 19-20 LH WING. I.A.W. EA# 57-0446-23 COVER REV. #0. THIS REPAIR IS CATEGORY B INSPECTION THRESHOLD INTERVAL FROM TIME OF SOLUTION EMBODIMENT 60,000 FC/ 120,000 FH (WHICHEVER OCCURS FIRST), INTERVAL TBD, METHOD OF INSPECTION TBD I.A.W. EA 57-0446-23. COVER REV. #0. ITEM 13DONE BY I. GARCIA 8647718 CHECKED BY O. ANDRADE 8620808.