What was found
DURING INCOMING INSPECTION AT GE WALES, DEFECTS ON THE HPT STAGE 2 DISK HAVE BEEN NOTED. CONDITION 1: THE HPT STAGE 2 DISK HAS 1 OFF NICK TO THE INTERSTAGE SEAL INTERFACE INBOARD OF THE DOVETAIL FORWARD END FACE. IT IS ADJACENT TO DOVETAIL #18. THE NICK MEASURES 0.001” IN AXIAL DEPTH, 0.005” RADIAL WIDTH AND 0.040” IN CIRCUMFERENTIAL LENGTH. THERE IS SHOTPEEN EVIDENT IN THE NICK, BUT THE COVERAGE IS UNSATISFACTORY AS IT DOES NOT COVER THE BASE OF THE NICK. CONDITION 2: THE HPT STAGE 2 DISK HAS 1 OFF DENT WITH AN ASSOCIATED BULGE AT THE DOVETAIL FORWARD END FACE AT DOVETAIL SLOT #19. IT IS ON THE FORWARD EDGE OF THE DOVETAIL SLOT BOTTOM. THE DENT PRESENT AT THE BOTTOM SURFACE OF THE DOVETAIL SLOT MEASURES 0.005” IN RADIAL DEPTH, 0.078” IN AXIAL LENGTH AND 0.120” IN CIRCUMFERENTIAL WIDTH. THE BULGE ON THE FORWARD EDGE FACE HAS AN AXIAL HEIGHT OF 0.002”, RADIAL WIDTH OF 0.060” AND CIRCUMFERENTIAL WIDTH OF 0.120”. DR #02236871 WAS REJECTED BY THE OEM AS THE SLOT BOTTOM IS THE CRITICAL LOCATION FOR BURST MARGIN. THEREFORE, THE REPORTED DEFECT IS NOT ACCEPTABLE. THIS IS A KNOWN OEM CONDITION. TO BE REPORTED I.A.W AMC 20-8A (J) ANY DEFECT IN A LIFE-CONTROLLED CRITICAL PART THAT CAUSES ITS RETIREMENT BEFORE THE COMPLETION OF ITS FULL SERVICE LIFE