What was found
(CAN) THE HOT SECTION WAS GIVEN AN UNSCHEDULED HOT SECTION INSPECTION DUE TO PERFORMANCE SHIFT. A FEW CT SHROUD SEGMENTS HAD SHIFTED SLIGHTLY AND WERE RUBBED. THE RETAINING RING HAD COME OUT OF HTE GROOVE. THIS PROBLEM HAS BEEN DOCUMENTED ON OTHER ENGINES. MFG HAS ISSUED P/N 3110741-02 RETAINING RING ON SB 13121 (60A, 61, 62, 65 SERIES) AND SB 3248 (41/42, 45 SERIES) TO PREVENT THE COLLAPSE OF THE RETAINING RING. THE LATTER SB HAS NOT BEEN ISSUED ON SMALLER ENGINE MODELS SUCH AS THE -114A ENGINE MODEL TO ALLOW THE MORE ROBUST RETAINING RING TO BE USED.