What was found
AESL REPORTED 1 OFF CRACK INDICATION FOUND ON THE PRESSURE FACE OF SERRATION LOCATION 8 OF LP TURBINE STAGE 5 DISC, EXTENDING FROM THE SERRATION TOP FACE TO THE SERRATION PRESSURE FACE OF ESN 51283. THE LENGTH OF REPORTED CRACK ON THE PRESSURE FACE OF SERRATION 8 IS MEASURED AS 0.246IN., AND MEASURED AS 0.111IN. O N THE RIM 6A. THERE WAS NO ACCEPTANCE LIMITS ON CRACKED SERRATIONS 8 PROVIDED BY EM. IN REFERRING TO PAST EXPERIENCE, “THE REPORTED CONDITION IS EXCESSIVE AND CANNOT BE ACCEPTED OR REPAIRED”. THE LPT STAGE 5 DISC IS REJECTED BY ROLLS ROYCE'S TV (TV287378) AT CSN:10,335 STANDARD DUTY CYCLES (SDC). IN ACCORDANCE WITH THE TIME LIMITS MANUAL 05-10-01-800-801, THE DECLARED LIFE OF THE LOW PRESSURE TURBINE (LPT) STAGE 5 DISC (P/N:FK24200) IS 15,000 STANDARD DUTY CYCLES (SDC). HENCE THE LPT STAGE 5 DISC IS RETIRED BEFORE THE COMPLETION OF ITS FULL LIFE. THIS INCIDENT IS ALSO REPORTED TO ROLLS-ROYCE FOR FURTHER ASSESSMENT