As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
(CAN) THE AIRCRAFT WINGS WERE REMOVED FOR A DETAILED INSPECTION AND HEAVY INTERGRANULAR CORROSION WAS FOUND ON THE INBOARD FACE OF THE FUSELAGE REAR SPAR CARRY THROUGH BLOCKS. THE RIGHT SIDE HAD LIGHT CORROSION WHICH WAS DRESSED OUT AND THE LEFT SIDE HAD TO BE REPLACED.