What was found
DURING HEAVY MAINTENANCE, (E/C A21-1370-01) WINGS / CENTER WING BOX / UPPER SKIN PANEL / UPPER SURFACE / FRAME 41-42 / STIFF 17 / CORROSION DAMAGE - PERMANENT REPAIR (CLASSIFIED AS A MAJOR REPAIR)
As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
DURING HEAVY MAINTENANCE, (E/C A21-1370-01) WINGS / CENTER WING BOX / UPPER SKIN PANEL / UPPER SURFACE / FRAME 41-42 / STIFF 17 / CORROSION DAMAGE - PERMANENT REPAIR (CLASSIFIED AS A MAJOR REPAIR)