What was found
WING ANTI-ICE CROSSFLOW VALVE HAS CAUSED DAMAGE TO THE LOWER FUSELAGE SKIN. DURING INSPECTION FOUND THERE IS A CHAFFED SPOT ON THE LOWER SKIN P/N: 7411392-12 OF SKIN BOND ASSEMBLY P/N: 7411391-2 FROM A STUD PROTRUDING FROM THE ANTI-ICE CROSS FLOW VALVE THAT HAS RUBBED INTO THE SKIN. THE AFFECTED AREA IS APPROXIMATELY 1/8" ROUND. BLENDED THE AREA AND NDT'D FOR CRACKS. NO CRACKS NOTED. THICKNESS MAPPED AS REQUIRED. DEPTH AT THIS TIME IS .007" DEEP. BLENDED DAMAGE AREAS IAW SRM 51-70-03 AND INSTALLED 0.040" SHIM AND 0.031 THICK RUB BLOCK OF PHENOLIC SHEET IAW REPAIR DEFINITION FR-680A-0062-6814 DATED 7/09/19.