What was found
FLT 681 - LOG STATED 'CHECK NR 2 ENGINE, HEARD LOUD THUMP'. ON INSPECTION OF INLET AND EXHAUST, FOUND FOREIGN OBJECT DAMAGE TO C-1 AND C-2 BLADES. REMOVED AIRCRAFT FROM FLIGHT LINE FOR ENGINE CHANGE AT HANGAR. REMOVED DEFECTIVE ENGINE AND REPLACED IT WITH A SERVICEABLE ENGINE. REMOVAL, REPLACEMENT AND OPERATIONAL CHECKS PERFORMED IAW BOEING MM 71-00-00. AIRCRAFT RETURNED TO SERVICE. (M)