As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING HEAVY MAINTENANCE: CORROSION TRAILING EDGE TOP SKIN LOWER SURFACE BETWEEN RIB 18 (PLUS 10 INCHES) TO RIB 19 ON LH WING; TASK CARD 572179-01-1-575 JB WO# 1389906 PERFORMED REPAIR LOCAION TRAILING EDGE TOP SKIN LOWER SURFACE RIB 18 PLUS 10 INCHES TO RIB 19 ON LH WING IAW EA57-0046-25.