What was found
DURING APU GENERAL VISUAL INSPECTION (TASK CARD # N8349002) FOUND RED BUTTON ON OIL FILTER INDICATOR TO BE EXTENDED. GROUNDED - YES. PERFORMED B737-900 AMM TASK 49-91-13, OIL FILTER INDICATOR SERVICING. INSPECTED APU MAGNETIC PLUG, FOUND NO DISCREPANCIES. REMOVED AND REPLACED LUBE FILTER ELEMENT PER AMM 49-91-12. RESET RED BUTTON ON FILTER INDICATOR. PERFORMED LEAK CHECK, NO LEAKS NOTED. RED BUTTON DID NOT EXTEND, OPS CHECK GOOD.