What was found
DURING TAXI IN SMELLED STRONG FUMES IN THE FLIGHT DECK. MAINTENANCE OBSERVED A LOT OF SMOKE FROM L ENG. NO OBSERVED ENGINE ABNORMAL READINGS, PACKS WERE GETTING AIR FROM APU WHEN ODORS BEGAN. REMOVED LPT FLANGE ASSY IAW AMM 72-56. GVI EXPOSED AREAS. INSTALLED LPT FLANGE ASSY IAW AMM 72-56-00. INSTALLED EXHAUST PLUG & NOZZLE ASSY IAW AMM 78-11. REMOVED CVT O-RING ESM REV 66.01 72-55, INSTALLED CVT O-RING CFM56-7B 72-55 ESM. INSTALLED LPT PLUG FWD. & AFT CONES AMM 72-55. (8824736) AIRCRAFT WAS GROUNDED