As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
YVR - MAJOR REPAIR - DURING C-15 CHECK A 3 INCH AREA OF EXFOLIATION CORROSION WAS FOUND ON STRINGER 27 LT, AT BS 967 WATER TANK COMPARTMENT. MAINTENANCE CUTOUT CORROSION ON STRINGER 27 LT AT BS 967; FABRICATED A REPAIR SPLICE (HAT CHANNEL); INSTALLED REPAIR PART IAW B737-200 SRM 53-10-3 FIG 1 PG 3-8.