As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
CORROSION ON RAIL NUT-PLATE LOCATED ORSS 375 INTERNAL CAVITY UPPER AREA TRAILING EDGE AT RT WING. REPLACED RAIL NUT-PLATE LOCATED ORSS 375 INTERNAL CAVITY UPPER AREA TRAILING EDGE AT RT WING IAW B737-800 SRM 51-40-02-0G SRM 51-10-02-0G-0 ITEM 9; DUE TO NOT FOUND ALLOWABLE DAMAGE ON B7373-800 SRM 57-20-10-1A-2 MEASURE OF CORROSION IS:L=1.717 W:0.489 MRT:0.01.