What was found
FLT #316, SFO-JFK. DIRTY SOCK SMELL OUTOF 20,000 ON DESCENT IN FORWARD SECTION OF AIRCRAFT APU OFF.; PER INFO NOTICE 2017-TO15M PERFORMED VISUAL INSP. OF APU FOUND SIGNS OF OIL ON AIR INLET. SURROUNDINGS. REF LOG PAGE 472187 ITEM 2.REF EC NO. A4917122-01 FOR STEAM CLEANING OF APU ENGINE AIR DUCTS, AND APU COMPARTMENT ACCOMPISHED. ALL EVIDENCE OF OIL CLEANED DURING PROCEDURE AND APU RAN FOR 15 MINS REF AMM 49-00-00. NO LEAKS NOTED. PERFORMED LEVEL B DECONTAMINATION IAW INFO NOTICE 2017-T015M & AMM 21-00-00