As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FLIGHT 7675 ENROUTE LMT-PDX AIR TURNBACK/DISCREPANCY: STANDBY ATTITUDE INDICATOR UNRELIABLE DURING CLIMB. RETURNED TO LMT. LANDED WITHOUT FURTHER INCIDENT. NO EMERGENCY DECLARED. CORRECTIVE ACTION: REPLACED THE STANDBY ATTITUDE INDICATOR.