What was found
AT FL380 ALL ENGINES WERE OPERATING NORMALLY. AS WE BEGAN OUR DESCENT AND THROTTLES CAME BACK TOWARDS IDLE ECS SURGED FOLLOWED BY A LEVEL 2 AIRSYS 2 PRES LO AND CONFIRM ENG OUT PROMPT. AIR PRESSURE OUT OF THE NUMBER 2 ENGINE WAS 9 PSI. THE NUMBER 2 THROTTLE WAS UNRESPONSIVE. N1 WAS 61%, N2 WAS 60% AND FUEL FLOW 540 PPH. AS WE WERE DISCUSSING THAT THE NUMBER 2 ENGINE ROLLED BACK AND OUR OPTIONS, THE EGT STARTED INCREASING AND N1 STARTED INCREASING AS WE WERE DESCENDING THROUGH FL300. ALL ENGINE PARAMETERS WERE NORMAL FOR THE RESTART. ALL THREE ENGINES OPERATED NORMALLY FOR THE DURATION OF FLIGHT TO AN UNEVENTFUL LANDING. (NEXT LOG PAGE, PILOT REPORTED THE N1 VALUE WAS AT 31% WHEN ENGINE ROLLED BACK, NOT 61%).