What was found
AT TOP OF DESCENT AS THRUST LEVERS WENT TO IDLE THE #1 ENGINE "VIB" INDICATION INCREASED RAPIDLY TO 4.3. GROUNDED - YES. ENG 1 S/N 894613 EXPERIENCED CORE VIBRATION OF 3.0 AS SEEN BY FORWARD AND REAR VIBRATION SENSOR (ASA TSR 713396). PERFORMED VISUAL INSPECTION OF INLET AND EXHAUST, FOUND METAL FRAGMENTS IN THE EXHAUST, RETRIEVED FRAGMENTS AND PROVIDE TO LEAD. REMOVED BORESCOPE PLUGS FOR ENGINE INSPECTION. #1 ENG FWD SUMP, AFT SUMP & AGB/TGB CHIP DETECTORS INSP CHECK GOOD REF ASA T/C #78472040. NO DEFECTS NOTED. REMOVED #1 ENGINE S/N # 894-613,