What was found
FA IN THE AFT CABIN REPORTED A POSSIBLE FUME EVENT. SOUR BODY ODOR DURING TAXI, A MUSTY ODOR DURING TAKEOFF AND ODOR OF PENCIL SHAVINGS DURING CRUISE. FEELING OF HEAVY AIR IN AFT CABIN. APU ECS NOT DE-ENERGIZED IN FLIGHT. PERFORMED TSM 71-00-00-810-802-A THRU STEP 4A(4). NO OIL WETTING PRESENT IN THE NR 1 & 2 ENGINES. PERFORMED AN IDLE ENGINE LEAK CHECK IAW AMM 71-00-00-710-006. NO LEAKS FOUND. NO ODOR NOTED IN THE CABIN.