As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
THE FLIGHT CREW REPORTED THAT DURING AIRCRAFT POWERUP THE STANDBY ATTITUDE INDICATOR FAILED TO INITIATE. THE MAINTENANCE TEAM REMOVED THE FAILED SECONDARY FLIGHT DISPLAY AND INSTALLED A REPAIRED UNIT. OPS CHECKS WERE SATISFACTORY AND THE AIRCRAFT WAS RETURNED TO SERVICE.