What was found
DURING INSPECTION FOR COMPRESSOR DAMAGE, FOUND PART CRACKED 11 PLACES. SB 72-0840 AUTHORIZES INSTALLATION OF PN 3107085-2 TO PROVIDE INCREASED SEAL PLATE TENSION AGAINST FIRST ROTOR ASSY. THIS PART WAS MODIFIED TO PN 3107085-2 BY INCORPORATING A SHIM BETWEEN THE AIR SEAL AND CURVIC COUPLING (NOTE: LIFE LIMITED PART LOG IDENTIFICATION WAS NOT UPDATED UPON MODIFICATION). INCREASED TENSION ON SEAL FLANGE RESULTS IN CRACKING AT FLANGE EDGE. SUGGEST ALLIED SIGNAL ENGINEERING REVIEW CAUSE/RESULT OF THIS DISCREPANCY. TIME SINCE MOD: 2130 HOURS, 2132 CYCLES. NOTE: THIS IS THE FIFTH ASSEMBLY FOUND CRACKED. CYCLES: 8915.