What was found
DURING HEAVY MAINTENANCE: CORROSION UPPER SURFACE OF THE UPPER SKIN OF THE CENTER WING BOX BTW Y1292 TO Y1732 AND BTW FR41 TO FR42 IN PASSENGER CABIN; PERFORMED PERMANENT REPAIR ON UPPER SURFACE OF THE UPPER SKIN OF THE CENTER WING BOX BTW. Y1292 TO Y1732 AND BTW FR41 TO FR42 IN THE PASSENGER CABIN IN ACCORDANCE WITH AEROMAN EA NO. EA57-0330-22 PART 1 AND EC NO. A22-614-01 AND RDAS 81090840/003/2022. ISSUE A. THIS REPAIR IS CAT A. ALL WORK ACCOMPLISHED ON AEROMAN NR# 2022-385695.