What was found
APU FAULT LIGHT, APU SHUTS DOWN AFTER 10 SECONDS. FAULT 49-94299 "STARTER-GENERATOR OIL FILTER BYPASS SHOWS CLOGGED. GROUNDED - YES. ON DEFERRAL. REMOVED STARTER-GENERATOR FILTER HOUSING REF AMM 49-91-12-00-803. REMOVED AND REPLACED OIL FILTER INDICATOR SWITCH REF AMM 49-91-13-000-803 AND 49-91-13-400-803. INSTALLED FILTER HOUSING WITH NEW FILTER INSTALLED REF AMM 49-91-12-400-803. RAN APU FOR 26 MINUTES. LEAK CHECK AND OPS CHECK GOOD. SHUT DOWN APU. NO OIL NEEDED. CDU SHOWED NO FAULTS ON CURRENT STATUS PAGE.