What was found
ATTEMPTED APU START AT 22,000. APU FAILED TO START WITH ASSOC APU FAULT EICAS MSG. ATTEMPTED 2ND START ON GROUND AT CVG. 2ND START SUCCESSFUL. FOUND APU BITE MSG EGT 293 - RPM 95 PERCENT - AUTO EVENT ECU BITE SHOWS LAST SHUTDOWN NORMAL. SHUTDOWN NR 2 LOP - 3 & 4, NO DATA. SUMMARY FAULTS - FAN VALVE/ MINI FLAGS READ 18. APU LOW ON OIL, CAP O-RING BAD. REMOVED AND REPLACED O-RING, SVCD APU OIL TO FULL. NORMAL START & OPN. ATL MCC NOTIFIED.