As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ETOPS SIGNIFICANT SYSTEM, APU VERIFICATION START ATTEMPT UNSUCCESSFULLY EICAS MSG APU OIL QTY DISPLAYED AND OIL QTY READS ADD. BITE CHECKED ECU FOUND AC START MESSAGE TS PER FIM 49-11-00. NO DEFECTS NOTED PHYSICALLY CHECKED APU OIL QTY FOUND OIL LEVEL LOW ADDED 6 PINTS OF OIL AS PRECAUTIONARY. REMOVED AND REPLACED APU OIL CAP O-RING P/N M8-3248-1-226. SECURED CAP RAN APU AT THE GATE FOR 540 MIN, NO LEAKS OR MSGS, ALL CHKS NML.