What was found
DURING SCHEDULED INSPECTION, FOUND SEAL FLANGE CRACKED. SB 72-0840 AUTHORIZES INSTALLATION OF THIS PART WITH A SHIM TO INCREASE TENSION AGAINST 1ST STAGE ROTOR. INCREASE TENSION CAUSES CRACKING AT THE SEAL FLANGE. THIS IS A CRITICAL LIFE-LIMITED COMPONENT. LIFE LIMIT IS 20,000 CYCLES. SUBMITTER STATES THIS IS THE 15TH CRACKED SEAL PLATE REPORTED BY THIS FACILITY. SUGGEST ALLIED SIGNAL DETERMINE/CORRECT CAUSE. PART TOTAL CYCLES, 9,933.