As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
MIA - AUXILIARY POWER UNIT LOW OIL PRESSURE INDICATION WITH LEFT ENGINE GENERATOR ON PLACARD. RETURNED MIA WITHOUT INCIDENT. AIRCRAFT REMOVED FROM SERVICE. REPLACED AUXILIARY POWER UNIT OIL COOLER AND NUMBER ONE INTEGRATED DRIVE GENERATOR. SYSTEM GROUND CHECK NORMAL OPERATION.