What was found
(CAN) FAILURE OF LPT3 BLADE. THESE BLADES WERE INSTALLED AT TIME OF MANUFACTURE. BASED ON EXPERIENCE FROM OTHER EVENTS, SEPARATIONS OF THE LPT 3 BLADE HAVE BEEN TRACED TO EXCESSIVE MECHANICAL ADJUSTMENT DONE DURING TIME OF MANUFACTURE. WHILE THIS IS A COMMON PRACTICE IN THE AEROSPACE CASTING INDUSTRY, THE GEOMETRY OF THIS BLADE MAKES IT SENSITIVE TO THIS PROCESS. THE FRACTURE APPEARS AS A STRESS RUPTURE FRACTURE MODE. IN AN EFFORT TO REDUCE ADDITIONAL FAILURES, HONEYWELL ISSUED SERVICE BULLETIN TFE731-3686 TO REQUIRE EDDY CURRENT AND FLUORESCENT PENETRANT INSPECTION OF AT MPI OR TIME OF TURBINE ACCESS.