What was found
ENGINE WAS RETURNED TO OUR REPAIR STATION FOR UNSCHEDULED REPAIR. A SERVICE CENTER LOCATED IN GERMANY RELAYED A COMPLAINT FROM THE AIRCRAFT OPERATOR TO THE ENGINE OEM PRODUCT SUPPORT GROUP REGARDING A VIBRATION ISSUE ON THE AIRCRAFT’S LEFT-HAND ENGINE. THE SERVICE CENTER PREEMPTIVELY PERFORMED BORESCOPE INSPECTIONS OF THE ENGINE AND THEN FORWARDED THOSE PHOTOS TO THE ENGINE OEM FOR DISPOSITION. THE PHOTOS EXHIBITED DAMAGE TO THE COMPRESSOR SECTION OF THE ENGINE, INCLUDING WHAT APPEARED TO BE A PAIR OF LIBERATED INTERMEDIATE PRESSURE COMPRESSOR (IPC) ROTOR BLADES. THE ENGINE OEM THEN DIRECTED REMOVAL OF ESN 1529 FROM THE AIRCRAFT AND RETURN TO OUR REPAIR STATION FOR INSPECTION AND REPAIR. DISASSEMBLY OF ESN 1529 CONFIRMED TWO MISSING IPC ROTOR BLADES, ACCOMPANIED BY SECONDARY DAMAGE TO FAN STATOR VANE TRAILING EDGES AND THE HIGH PRESSURE COMPRESSOR.