What was found
(AIRCRAFT NOT GROUNDED) DURING CRUISE, FL 340, AFT FA'S REPORTED SOUR MILK SMELL AT LEAST 4 TIMES DURING CRZ. W/ EYE IRRIATITION. LOCATION L2 DOOR / REF WO# 526976 NRC 22814-1 FOR REPLACEMENT OF APU FUEL CONTROL UNIT DUE TO PHASE 2 ODOR EVENT TASK CARD. NO FURTHER LEAKS NOTED. PERFORMED GVI OF ENG FOR OIL LEAKS NO SIGNIFICANT LEAKS FOUND IAW AMM 12-13-79-610-002-A. NOTICED OIL CAP O-RING SLIGHLY WORN & LOOSE. REPLACED O-RING IAW AMM 79-11-10-300-003-A. A/C OK FOR SERVICE. OIL CONSUMPTION WITHIN LIMITS IAW AMM 72-00-00-200-008-A.