As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
LOWER FUSELAGE, FWD CARGO COMPARTMENT. FROM STA 500H TO STA 500I AT RBL 21 AND LBL 21 THE INTERCOSTALS (BAFLES) WITH CORROSION. REPLACED (BAFLES) INTERCOSTALS FROM STA 500H TO 500I AT 21 RBL AND 21 LBL IAW B737-800 BCF SRM 51-40-02-0G-0 PARG 4B AND BOEING INST. SWG 143A7902 SHEET 36 REV E