As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
LCQ - MAJOR REPAIR - DURING C-18 CHECK A 2" CRACK WAS FOUND ON KEEL BEAM PANEL BETWEEN THE L/H AND R/H WHEEL WELLS BS 600 TO 724. MAINTENANCE REMOVED EXISTING DOUBLER; PERFORMED NDT INSPECTION OF CRACK; REPLACED BLIND FASTENERS WITH SOLID FASTENERS; FABRICATED REPAIR DOUBLER; INSTALLED REPAIR PART IAW B737-200 SRM 53-30-3, FIG. 40, PG. 151.