What was found
AFTER ENG START , OVERWHELMING FUEL/ OIL SMELL ON FLIGHT DECK. SMOKE/FUMES MEMORY ITEMS COMPLETE. O2 CHECK COMPLETE. SHUT DOWN THE ENGINES TOWED BACK IN ON O2. INSPECTED BOTH LH & RH PACKS PER B757 AMM 21-51-00-216-001 AND BOTH LH & RH ENGINES FOR LEAKS AND SIGNS OF FUEL/OIL STAINS/POOLING. NO LEAKS OR DEFECTS FOUND. PERFORMED FUEL/OIL CONTAMINATION REMOVAL FROM THE AIR CONDITIONING AND PNEUMATIC SYSTEMS IRW B757 AMM 21-00-01-002-001. RAN BOTH ENGINE MULTIPLE TIMES PER B757 AMM 71-00-00 WITH NO SMELL OF FUEL/OIL. AIRCRAFT OK FOR SERVICE AT THIS TIME.