As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
REF T/C N8349002, FOUND OIL FILTER INDICATOR RED BUTTON EXTENDED ON APU. GROUNDED - YES. ACCOMPLISHED OIL FILTER INDICATOR SERVICING PER B737-900 AMM 49-91-13. REMOVED AND REPLACED LUBE FILTER ELEMENT REF AMM 49-91-12 AND INSPECTED MAGNETIC DRAIN PLUG REF AMM 49-91-81, NO PARTICLES FOUND, OPS CK GOOD.