What was found
(CAN) DURING MAINT WALK AROUND INSP, IT WAS NOTED THAT ALL (4) MLG LOCATIONS RECEIVED SIDE WALL DAMAGE ON FIRST 20 HRS OF FLIGHT ON A FACTORY NEW AC DUE TO INTERFERENCE FIT. AC HAS (2) STC’S INCLUDED IN THE MLG. THEY ARE AS FOLLOWS: AC EQUIPPED WITH (P/N:028-335-3) (WILDERNESS TIRES): STC SA00184LA. AC ALSO EQUIPPED WITH WHEEL AND BRAKE CONVERSION KIT: STC SA757GL BY STC HOLDER - MFG WAS CONTACTED AND STATED THAT THEY WERE AWARE OF THE PROBLEM SOME SIX MONTHS AGO. I’M TOLD THE PROBLEM HAS ARISEN WITH THE (19.5X6.75-8/10/190 P/N:028335-3) WHEN MFG OUTSOURCED ITS MANUFACTURE TO FROM THE EXISTING USA FACILITY. THE OUT OF COUNTRY MFG TIRES ARE BUILT TO A WIDER TOLERANCE FOR SOME REASON. NOTE: ALL AFFECTED TIRES WERE MFG OUT OF COUNTRY. STC HOLDER HAS AUTHORIZED US TO USE AN ALTERNATE TIRE (P/N:196K08-9) AS A REPLACEMENT ON THE SAME STC. THE TIRES ARE CONSIDERABLY NARROWER AND THEREFORE HAVE NO INTERFERENCE ISSUES ASSOCIATED WITH ITS INSTALLATION. (TC NR 20070201007)