What was found
(CAN) FLT CREW RPTED DURING CLIMB AFTER TAKEOFF THEY EXPERIENCED SERIES OF LOUD BANGS FROM NR 2 ENGINE ACCOMPANIED BY ABNORMAL HIGH EGT & LOW N 2 RPM. ALL IND.S WERE NORMAL PRIOR TO NOICE. PROBLEM OCCURRED AFTER CLIMB THRUST SET. THE CREW REDUCED NR 2 THRUST TO ALMOST IDLE, AS PER ENGINE LIMITS / SURGE / STALL QUICK REF CHART (QRC) AND ENGINE OPERATED NORMALLY. A/C RETURNED&LANDED W/O INCID. - CFR WERE NOTIFIED&ON STANDBY.INIT MAINT INSPECTION FOUND NR 2 ENGINE NOSE CONE BULLET HAD SEPARATED FROM ITS ATTACHMENTS & JAMMED INTO ENGINE INLET GUIDEVANES. MAINT REPL ENGINE,