As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING THE C12 CHECK, PERFORMING THE TASK 0314 AND CPCP CARD 16-57301, AT RT WING REAR SPAR LOWER FOUND 6 X 1 INCH MAX D=0.150 INCH CORROSION AT XRS=188.5 TO 194.5. REQUEST BOEING ASSISTANCE AND IAW BOEING'S RESPONSE REPAIR THE CORROSION AREA. MANUFACTURE ISSUED FAA FORM 8100-9, AND APPROVED REPAIR PROCESS IAW ENGINEER COMMITTED EO-MD80-57-0095 REPAIRED.