What was found
DURING HOT SECTION INSPECTION, FOUND PART CRACKED. SB 72-0840 AUTHORIZES INSTALLATION OF EITHER PN 3103315-05 OR PN 31070825-2 TO PROVIDE INCREASED SEAL PLATE TENSION AGAINST FIRST ROTOR ASSY. THIS PARTICULAR PART WAS MODIFIED TO PN 3107085-2 BY INCORPORATING A SHIM BETWEEN THE ROTATION AIR SEAL AND THE CURVIC COUPLING, BUT WAS NOT RE-IDENTIFIED. SUBMITTER BELIEVES THIS INCREASED TENSION IS CAUSING THIS PART TO CRACK. SUGGEST ALLIED SIGNAL ENGINEERING REVIEW THIS PROBLEM. SUBMITTER NOTE: THIS IS SECOND ASSY FOUND CRACKED.