What was found
PASSING FL 23500 ABOUT 10 SEC AFTER SELECTING CLB PWR, LEFT ENG COMPRESSOR STALL (5 BANGS). PULLED TO IDLE MAX TEMP 928 FOR 4 SEC, INDICATED AIRSPD 310 KTS. BEGAN DESCENT, LEFT ENG COMPRESSOR STALLED AGAIN 3 TIMES AS PWR WAS REDUCED. SHUTDOWN ENG PASSING 8,000 FT. BORESCOPED ON COMPRESSOR AND TURBINE SECTION, NO DAMAGE. CKD SCAVAGE OIL FILTER AND CHIP DET PLUGS. FOUND METAL IN TAIL PIPE. REPLACING ENGINE NR 1.