What was found
ON FINAL APPROACH, NR 1 ENG STARTED TO VIBRATE AFTER A BANG. EGT WENT TO 700 DEG. ENGINE WAS AT FLIGHT IDLE. ENGINE APPEARED TO COME BACK AND OPERATE FINE. ON LANDING ROLLOUT, THE EGT CLIMBED TO 710 DEG. AND INCREASING. SHUTDOWN ENGINE. N1 & N2 LOOKED NORMAL, PERFORMED GVI OF NR 1 ENG INTAKE AND EXHAUST. NO DEFECTS NOTED. TROUBLESHOT ENGINE PER TSM 72-00-30, ENGINE STALL WITH RAPID EGT RISE. PERFORMED GENERAL INSPECTION CHECK PER AMM 72-00-00-06 & ENGINE STALL INSPECTION PER MM 72- 00-00-06. INLET AND EXHAUST INSPECTED, NO FAULTS. CHECKED MCD NO METAL FOUND, INSPECTED VSV AND VBV SYSTEMS, NO FAULTS FOUND. INSPECTED PS 3 TUBE NO CRACKS FOUND. PERFORMED BOROSCOPE INSPECTION OF 1ST, 6TH & 12TH STAGES OF HPC, 1 ST & 2 ND STAGE HPT & COMBUSTOR AND LINER, REF MM 72-00-00-06, NO LIMITING DEFECTS. R & R 8TH STAGE CHECK VALVE IAW MM 36-11-13-04. RAN ENGINE, LEAK CHECKED DUCTING, NO LEAKS NOTED. PERFORMED MAX POWER ASSURANCE RUN PER JRH ENGINE. CHECKED GOOD.