As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING APU GVI REFER T/C 78349007 STEP D FOUND OIL FILTER INDICATOR EXTENDED. GROUNDED - YES. REMOVED AND REPLACED LUBE FILTER ELEMENT ON APU REFER AMM 49-91-13. OPS CK GOOD, NO LEAKS NOTED OR DEBRIS ON MAGNETIC DRAIN PLUG. APU BITE CHECK NO FAULTS FOUND. SEAMC MITCH NOTIFIED.