What was found
CREW REPORTED INBOUND, AN OIL ODOR DETECTED AT TOP OF DESCENT IN MAIN CABIN. MAINTENANCE WAS CALLED OUT AND PERFORMED THE FOLLOWING: PERFORMED 2 ENGINE RUN, 1 AT A TIME, 5 MINUTE RUN, EACH WITH BOTH PACKS ON NO SMELL NOTED. TEST IAW 71-00-00. OK FOR SERVICE.