As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING CAM INSPECTION, FOUND SEAL CRACKED 3 PLACES. SB 72-0840 AUTHORIZES INSTALLATION OF THIS PART TO PROVIDE INCREASED PRESSURE AGAINST 1ST STAGE ROTOR. THIS INCREASED PRESSURE RESULTS IN CRACKING OF THE SEAL EDGE DIAMETER. SUGGEST ALLIED SIGNAL ENGINEERING REVIEW PART/INSTALLATION PROBLEM. CSN, 9,014.