What was found
CREW REPORTED – EXPERIENCED SEVERAL ABNORMAL AIRCRAFT VIBRATIONS. DISCUSSED WITH CREW. DECLARED AN EMERGENCY. LANDED AT NEAREST SUITABLE AIRPORT USING NORMAL PROCEDURES. USA JET MAINTENANCE WAS SENT TO KAFW TO TROUBLESHOOT PROBLEM. UPON INSPECTION OF THE #2 ENGINE METAL SHAVINGS WERE FOUND IN THE INLET. THE FRONT ACCESSORY COVER WAS REMOVED, AND IT WAS FOUND THAT THE #1 BEARING HAD FAILED. THIS WAS THE CAUSE OF THE VIBRATION IN FLIGHT. THE #2 ENGINE IS BEING REPLACED AND THE ENGINE SHOP WILL SEEK TO DETERMINE THE CAUSE OF THE #1 BEARING FAILURE. NOTE: C1 FAN DISK WAS REPLACED AT SHOP VISIT WHICH WOULD HAVE NECESSITATED THE INSPECTION OF THE #1 BEARING FOR SERVICEABILITY. A SUPPLEMENTAL REPORT WILL BE FILED IF THE ENGINE SHOP CAN DETERMINE A CAUSE FOR THE #1 BEARING FAILURE WITH SOME DEGREE OF CERTAINTY. THIS ENGINE IS ON LEASE TO USA JET AIRLINES AND THE #1 BEARING MANUFACTURER, PART NUMBER AND SERIAL NUMBER ARE NOT IMMEDIATELY AVAILABLE. REPORT IS BEING FILED WITHOUT THIS INFORMATION TO MEET THE FAR 121 REPORTING REQUIREMENTS FOR AN INCIDENT SUCH AS THIS. A SUPPLEMENTAL REPORT SHALL BE FILED ONCE THIS INFORMATION IS MADE AVAILABLE BY THE ENGINE LESSOR.