As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
CORROSION FOUND ON MATING SURFACES OF RT WING REAR SPAR (AFT SURFACE) COMMON TO RETRACTION JACK FITTING AROUND HOLES NR 58 AND NR 81. CORRECTIVE ACTION: COMPLIED WITH ER/A 588447-14AD REV ORIGINAL. OK TO CONTINUE TO MONITOR, JOB COMPLETE.