What was found
DURING HEAVY MAINTENANCE: CORROSION UPPER SURFACE OF BOTTOM SKIN PANEL NO3 BTW GEAR RIB 5 AND RIB 5A ON LH WING (CPCP RELATED MPD TASK 575167-01); PERFORMED REPAIR ON UPPER SURFACE OF BOTTOM SKIN PANEL NO 3 BTW GEAR RIB 5 AND RIB 5A ON LH WING TOOL USED DIGITAL CALIPER P/N 500-752-20 S/N B16101265 DUE DATE NOV-15-2023. ULTRASONIC THICKNESS GUAGE P/N 45MG /N 130061901 CAL DATE APR 082023 EDDY CURRENT EQUIPMENT P/N NORTEC 500D S/N N500X12101V022233 CAL DATE AUG-30-2023 ALL WORK ACCOMPLISHED ON AEROMAN WO 2023-90/1 NR 2023-193678. (CONSIDERED AS A MAJOR REPAIR)