As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
(CAN) FOLLOWING ENGINE MOUNT REPLACEMENT FOR SB 1103, IT WAS DISCOVERED THE MOUNT CHAFED ON ONE ENGINE MOUNT TUBE BECAUSE OF A PIECE OF THE PLENUM MAKING CONTACT. CORROSION HAD STARTED TO TAKE PLACE. THE PROBLEMATIC PART (A BOOT SEALING THE PLENUM AROUND AN ENGINE MOUNT TUBE) WAS ADJUSTED TO PREVENT CHAFING ON THE NEW ENGINE MOUNT.