What was found
ODOR DETECTED DURING DESCENT AT 10,000 TO 6000 FT, TURNED THE NR 1 PACK OFF, ODOR LINGERED TO PARKING. NOTICABLE FROM CABIN TO MID CABIN. R & R THE DEOILER SEAL ASSY. AND MATING RING IAW AMM 72-60-31, AND 72-60-29. PERFORMED A DECONTAMINATION OF ENVIROMENTAL CONTROL SYSTEM IAW AMM 21-00-00. ENGINE RUNS PERFORMED, NO LEAKS NOTED AND NO FUMES NOTED.