As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING HEAVY CHECK, FOUND CORROSION ON LEFT KEEL BEAM LOWER CHORD AT BS 727 STRINGER 27L. THE CORROSION WAS TRIMMED OUT PER SRM. FABRICATED FILLER AND DOUBLER. INSTALLED REPAIR PARTS USING SRM 51-30-2. VERIFIED APPROVAL RECEIVED AND COMPLETED REPAIR IAW ECO 1972. AIRCRAFT RETURNED TO SERVICE. (M)