What was found
GENERAL SURFACE CORROSION ON FWD CABIN PRESSURE SAFETY VALVE FUSELAGE SKIN. PRESSURE VALVE COLLAR WAS REPLACED IAW DWG 591657555-5 REV.E. AND SRM 51-30-1 & 51-30-2 FWD CABIN PRESSURE SAFETY VALVE WAS REMOVED, INSTALLED, AND TESTED IAW AMM 21-32-07. (UT) WAS ACCOMPLISHED. ORIGINAL THICKNESS IS 0.050" IN AND MINIMUM REMAINING THICKNESS IS 0.09" IN THEREFORE COLLAR IS "OUT OF LIMITS" IAW SRM 53-01 FIG.1 AND NDT SPM 04-00-07 PARAGRAPH FIG.3 (SHEET 1 AND 2).