What was found
DURING HEAVY MAINTENANCE: WINGS / CENTER WING BOX / TOP SKIN PANEL / UPPER SURFACE / BTWN FR41-42 @ Y1292 EDGE / CORROSION - PERMANENT REPAIR (CONSIDERED A MAJOR REPAIR)
As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
DURING HEAVY MAINTENANCE: WINGS / CENTER WING BOX / TOP SKIN PANEL / UPPER SURFACE / BTWN FR41-42 @ Y1292 EDGE / CORROSION - PERMANENT REPAIR (CONSIDERED A MAJOR REPAIR)