What was found
AFTER #2 ENGINE SHUT DOWN AND NO LONGER SPINNING NOTED TAIL PIPE FIRE IN TURBINE AREA. DRY MOTORED ENGINE AND FLAMES EXTINGUISHED. PERFORMED BOROSCOPE OF COMUSTION SECTION, HPT NOZZLE GUIDE VANES, HPT BLADES AND STAGE 2-4 LPT NOZZLE GUIDE VANES PER B737 AMM 72-00-00. FOUND CARBON SOOT STAINS AT 12:00 NO ENGINE DAMAGE NOTED. REMOVED EXHAUST PLUG FLAME ARRESTOR AND SUMP COVER FOR ACCESS TO INLET COVER. NO LEAKS NOTED.