As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
INT - DURING 1/2C-CHECK, FOUND 4 INCH BY 20 INCH SKIN BULGES AT RIGHT KEEL BEAM SPLICE AT BS 727 THROUGH BS 727A. CUT OUT FUSELAGE SKIN TO GAIN ACCESS TO KEEL BEAM, BLENDED OUT CORROSION, VERIFIED NO CRACKS AND INSTALLED REPAIR PER EA 43596. (M)