What was found
DURING TAXI PILOT OBSERVED ALL ANNUNCIATOR LIGHTS ILLUMINATED WHILE TAXING OUT FOR DEPARTURE, ACFT RETURNED TO PARKING UNEVENTFULLY.
As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
DURING TAXI PILOT OBSERVED ALL ANNUNCIATOR LIGHTS ILLUMINATED WHILE TAXING OUT FOR DEPARTURE, ACFT RETURNED TO PARKING UNEVENTFULLY.