What was found
AT TOP OF DESCENT WITH POWER REDUCTION, THE NR 1 ENGINE AUDIBLY COMPRESSOR STALLED. THERE WAS A SLIGHT VIBRATION AND RISING EGT. THE ENGINE WAS SHUT DOWN WITH A MAXIMUM EGT OF 690C. RESTART ATTEMPT WAS SUCCESSFUL AND THE ENGINE OPERATION WAS NORMAL FOR THE REMAINDER OF THE FLIGHT. MAINTENANCE INSPECTED THE ENGINE PER MM 71-00-00 FOR A TYPE A STALL WITH NO DEFECTS. ENGINE RUN WAS NORMAL. THE AIRCRAFT RETURNED TO SERVICE WITH A FIVE CYCLE BORESCOPE DEFERRAL.