What was found
NR 1 ENGINE REMOVED FROM ACFT, DUE TO 5 INCH AXIAL BULGE AT OUTER TURBINE CASE, 2-3 OCLOCK POSITION WITH APPROX .5625 INCH HORIZONTAL CRACK RUNNING THROUGH CENTER MOST PORTION OF THE BULGED AREA. UPON REMOVAL OF ENGINE HOT SECTION, TURBINE OUTLET DUCT FOUND TO HAVE APPROX A 8.5 INCH SECTION OF MATERIAL BROKEN OFF AND PEELED BACK FROM OUTER DUCT AREA AT NR 2 AND NR 3 COMBUSTION CAN POSITIONS. THE P AND D VALVE AND FUEL MANIFOLD ASSEMBLIES WERE INSP AND FOUND TO HAVE NO EVIDENCE OF FAILURE. PROBABLE CAUSE IS UNKNOWN AND NO RECOMMENDATIONS TO PREVENT RECURRENCE AT THIS TIME. (K)