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-19 CHECK CORROSION WAS FOUND ON STRINGER 15 LT AT BS 1006. MAINTENANCE CUT OUT DAMAGE IN STRINGER 15 LT AT BS 1006; FABRICATED A NEW REPLACEMENT SECTION OF STRINGER, FILLER AND DOUBLER; INSTALLED SPLICE REPAIR IAW B737-300 SRM 53-00-03 FIG 201.