What was found
HP BLADE TIP RUB, IMPACT DAMAGE ON AND DOWNSTREAM OF THE LP STATOR, RUBBING DAMAGE ON THE LP DISK, MULTIPLE FRACTURED BOLTS AND A FRACTURED EXTERNAL BRACKET. THE HP BLADE TIP RUB, RUBBING ON THE LP DISK AND THE FRACTURED BOLTS AND EXTERNAL BRACKET ARE CONSIDERED TO BE VIBRATION RELATED DAMAGE WHICH OCCURRED AS A RESULT OF THE LP BLADE FAILURE. THE LP BLADES WERE CREEP INSPECTED TO DETERMINE IF BLADE CREEP WAS A FACTOR IN THE LP BLADES FAILURE. OF THE 53 BLADES IN THE SET, ONLY 7 COULD BE CREEP INSPECTED. THE REMAINING 46 BLADES WERE EITHER FRACTURED OR HAD CREPT TOO MUCH TO BE MEASURED IN THE FIXTURE. THE 7 BLADES WHICH WERE MEASURED HAD CREEP VALUES RANGING FROM 0.035" TO 0.042". THE LP BLADES HAVE ACCUMULATED 9111.4 HRS SINCE NEW AND THEREFORE DID NOT REQUIRE A CREEP INSP AT THE LAST ACCESS WHICH WAS A HOT SECTION INSP 702.7 HRS AGO. THE PN OF THE LP BLADES WAS 3049152-01. THE CAUSE OF THE LP BLADE FAILURE WAS DETERMINED TO BE BLADE CREEP. THE ENGINE WILL BE RETURNED TO SERVICE UNDER A REPAIR WORKSCOPE WHICH WILL INCLUDE THE MFG LIGHT OVERHAUL MANUAL REQUIREMENTS FOR AN LP BLADE FRACTURE BELOW THE PLATFORM.