What was found
ACFT PERFORMED AN UNSCHEDULED LANDING, DURING CLIMB AT 18,500 FEET, THE LT ENG WAS SHUTDOWN SUDDENLY. MX PERSONNEL REVIEWED THE ENGINE AND CHIP DETECTORS AND NO DAMAGES WERE FOUND, SO BOROSCOPE INSPECTION WAS PERFORMED ON COMPRESSOR AND TURBINE, DETECTING HPT REAR RETAINING RING LOOSE. THE ENGINE WAS REPLACED AND TESTED IAW MPCM 71-00-02 AND 71-00-000, ALL CORRECT.