What was found
PDIS 939 21-70 8622 05FEB21 LGG OPEN U LOGPAGES:3301364 OBSERVED AN ACRID, BURNING OIL SMELL DURING ALL PHASES OF FLIGHT WITH MARKED INTENSITY ON APU BLEED, CLIMB AND DESCENTS. EXPIRIENCED WHAT IS DESCRIBED AS A FUME EVENT. SHGN 05FEB21 01:26 LGG U DURING CREW DEBRIEF WAS TOLD THAT THE ISSUE STARTED ON APU STARTUP BEFORE LEAVING EMA, WITH APU RUNNING. RAN APU IAW JRH AND DID NOTICE A FAINT OIL ODUR, THAT GOT MORE INTENSE THE LONGER THE APU WAS RUN. MEL 05FEB21 01:37 LGG U RELEASED FOR SERVICE PER MEL : 49-11-01 CATEGORY : C EXPIRATION : 15FEB21 "MEL 49-11-01: APU - INOP. REFER TO THE OPERATIONS NOTE FOR DRY ICE RESTRICTIONS." PER MOCC T/S IAW FIM 71-05-43-828 UMTILL STEP 5, NO VISUAL OBVIOUS INDICATIONS OF LEAKAGE FOUND ON BOTH ENGINES. CONFIRMED NO HIGH OIL CONSUMPTION EXIST. PER FIM 21-00-01-3-0. T/S APU AND WHILST RUNNING APU IAW JRH NOTICED THE OIL ODUR INCREASED THE LONGER WE HAD THE APU RUNNING. IAW MOCC DEFERRED APU INOP IAW MEL 49-11-01. C/7258715 05FEB21 02:20 MEM R T/S REQUIRED TSI 21-70/8621