What was found
APU COLD SOAK START FAILED. APU COLD SOAK START PERFORMED, APU STARTED, RAN FOR 10 MIN. ALT 38,000; TIME: 2100Z. START FAILED. PERFORMED APU EXTERNAL INSPECTION IAW AMM 49-21-00-206-001. FOUND OIL LEAKING FROM APU GENERATOR HOUSING. SERVICED APU OIL TO FULL, NO HELP. PERFORMED BOEING FIM 49-11 FT 995. SERVICED APU WITH 1/2 QUART OF OIL. CHECKED FOR BITE FAULTS, NONE PRESENT. RAN APU FOR 2 HOURS, RE-CHECKED FOR FAULTS, NONE PRESENT. INSPECTED FOR LEAKS, NONE NOTED AFTER SHUTDOWN. NO EICAS MESSAGE PRESENT. R/R APU GENERATOR IAW AMM 24-21-01. OPS CHECKED GOOD.