What was found
AFT F/A REPORTS BURNING RUBBER ODOR IN CABIN. ODOR DISAPPEARED ONLY WHEN NR 2 BLEED CLOSED. RAN NR 1 & 2 ENGINES WITH BOTH PACKS ON AND CYCLED BOTH ENGINE BLEEDS. NO ODOR NOTICED AT THIS TIME. AFTER SHUTTING DOWN ENGINES, NOTICED EXCESSIVE POOLING OF OIL IN THE NR 1 ENGINE DEOILER TUBE. REMOVED AND REPLACED DEOILER SEAL AND PACKING IAW AMM 72-60-31. IDLE LEAK CHECKED NR 1 ENG IAW AMM 71-00-00. NO LEAKS AND NO ODOR NOTED AT THIS TIME.