As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
LAS - INFLIGHT ORD-LAX. CREW REPORTED AUXILIARY POWER UNIT LOW OIL QUANTITY MESSAGE WITH RIGHT ENGINE DRIVEN GENERATOR ON MEL. EMERGENCY DECLARED FLIGHT DIVERTED LAS LANDED WIHTOUT INCIDENT. NO OIL LEAKS WERE NOTED. REPLACED APU OIL LEVEL SENSOR. SYSYEM GROUND CHECK NORMAL OPERATION.