As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
WHILE ACCOMPLISHING T/C N8349002, FOUND APU OIL FILTER INDICATOR EXTENDED. GROUNDED-YES. ACCOMPLISHED OIL FILTER INDICATOR SERVICING TASK B737-900 AMM 49-91-13-600-801. LUBE FILTER ELEMENT REPLACED, REF AMM 49-91-12, NO CONTAMINATION FOUND AND NO LEAKS DETECTED.