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-14 CHECK CORROSION WAS FOUND ON APU TORQUE BOX FRAME APPROXIMATELY 3 INCHES FROM LOWER END AT BS 1113 RT SIDE. MAINTENANCE REMOVED STIFFENER ON APU TORQUE BOX FRAME, FABRICATED A NEW STIFFENER AND FILLER PLATE, AND INSTALLED IAW B737-200 SRM 51-10-1 PG 8 AND DWG 65-46579, SHT 4.