As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FOUND CORROSION ON LOWER KEEL BEAM SURFACE AT BS 727. CUT OUT SKIN AREA AS REQUIRED TO ACCESS KEEL BEAM LOWER SURFACE. BLENDOUT KEEL BEAM LOWER CHORD SURFACE CORROSION. FABRICATED A FILLER FROM .71 TO .12 INCH 2024-T3. FABRICATED TWO DOUBLERS FROM .063 AND .080 INCH 2024-T3. ASSEMBLED REPAIR PARTS IAW ECO 1972 FIGURE 1. AIRCRAFT RETURNED TO SERVICE. (M)