What was found
AIRCRAFT DEPARTED UNITED KINGDOM; 15 TO 20 MINUTES OUT, NR 3 GENERATOR INOP LIGHT ILLUMINATED AND WOULD NOT RESET. UPON GEAR-DOWN INSPECTION, FOUND DRIVE END BEARING FAILED CATASTROPHICALLY. BEARING FAILED AFTER 189.0 FLIGHT HOURS. DRIVE END RETAINING BAND ON ARMATURE DETACHED. ARMATURE, FIELD AND DRIVE END BELL WERE DAMAGED SEVERELY. THE UNIT'S DRIVE SHAFT HAD SHEARED. SUBMITTER RECOMMENDS REDESIGNING DEFECTIVE BEARINGS. OPER CONTROL NR XC4R9531624.