As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AIRCRAFT IN BASE MAINTENANCE: CORROSION ON LEFT WING TOP SKIN FROM RIB 18 TO RIB 19. EVALUATED BLENDED AREA LOCATED REAR SPAR TOP SKIN LOWER SURFACE BTW RIB 18 TO RIB 19 ON LEFT WING AND FOUND WITHIN LIMITS IAW SRM 57-21-11-283-026 PARAGRAPH 2 A SHEET 07 FIGURE 005.