As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AIRCRAFT WAS GROUNDED: PILOT DECLARED EMERGENCY ON ACCOUNT OF LOSS OF STANDBY ATTITUDE INDICATION. AIRCRAFT OVERWEIGHT FOR LANDING. MAINTENANCE REPLACED THE STANDBY ATTITUDE INDICATOR AND ACCOMPLISHED ALL REQUIRED TESTS IAW AMM 34-24-01-404-088. ALL TESTS NORMAL.