As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
SJO - RIGHT WING NR 3 FUEL TANK RIB CRACKED IN AFT SECTION BETWEEN REAR SPAR AND STRINGER 2, WBL 135.5 DEFECT SIZE, LENGTH 1 INCH. REPAIRED RIGHT WING RIB LOWER CHORD AT WBL 135.5 BETWEEN STRINGER 2 AND STRINGER 3 PER BOEING SERVICE BULLETIN 737-57-1186 DATED APRIL 13, SECTION 3 PART 3, FIG 3. (M)