What was found
REFERENCE LP533532 ITEM #1 FUME EVENT AFT CABIN VERY STRONG MOVED TO FORWARD CABIN DIRTY SOCK SMELL., AC WAS GROUNDED AS A RESULT OF THE SDR REPORTABLE EVENT. FERRY FLIGHT FROM ELP TO LAS PLACED APU ON MEL, TRANSFERRED TO NON-ROUTINE REF NR141160 FOR MX ACTIONS, APU REMAINS ON MEL 49-10-01-A, CN 1243621 RECOMMEND PERFORMING TSWS C/N 1243650 AFTER CORRECTIVE ACTION NO LEAKS DETECTED. AC OK FOR SERVICE.