What was found
DURING CLIMB THROUGH FL 300, STBY HORIZON WENT OFF FOLLOWED BY STALL FAULT IND. FOLLOWED BY RUDDER LIMITER. ADVISORY INTEGRATED STANDBY INSTRUMENT REPLACED IAW AMM TASK 34-12-01-000-801/400-801 (CONFIG A01) REV 35, OPT IAW AMM TASK 34-12-01-710-801 (CONFIG A01) REV 35, PERFORMED. FOUND SATISFACTORY, ACFT RETURNED TO SERVICE.