As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
CREW REPORTED THAT DURING FLIGHT THE STANDBY ATTITUDE INDICATOR WENT BLANK & WENT TO, ATT CAGE. THE CREW RETURNED TO FIELD & LANDED WITHOUT INCIDENT.. RESET THE ISIS CB, ALL INDICATIONS RETURNED TO NORMAL & NO FURTHER DEFECTS WERE NOTED.