As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING 2C+12A+150M CHECK, EGAT MECHANIC FOUND CORROSION UNDER LEFT WING T/E FIXED PANEL UPPER SURFACE NEAR NR 5 SPOILER OUTBOARD SIDE. REPAIR THE DAMGED AREA PER EGAT E1 NR W2007A57B-066 REV.OO & APPROVED DOCUMENT BOEING MESSAGE NR 1-277655111-2. 2.CONDITION CHECK NORMAL. REF EGAT NRC NO.UO5072