What was found
DISK TT 3140.1 TC 2697 MAX ALLOWABLE OPER. TIME IS 8000 HR AND 8000 CYCLES.DURING OVERHAUL OF ENGINE AND PERFORMING FLUORESECENT PENETRANT INSPECTION, THE SECOND STAGE TURBINE DISK PN/405802, SN/G23877 WAS FOUND TO HAVE 13 EA CRACK INDICATION INBOARD OF THE BLADE ROOT. CRACK INDICATIONS VARY FROM APPROXIMATE .05 TO .10 INCH IN LENGTH. DISK REMOVED FROM SERVICE FOR FURTHER INVESTIGATION.