As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING CLIMB-OUT FROM KTOL PILOTS HSI/ADHI WAS INOP, INFORMATION WAS LOST. AFTER CREW RESET CIRCUIT BREAKERS ADHI RETURNED THEN WENT BLANK. CREW RETURNED AIRCRAFT TO KTOL AND LANDED WITHOUT INCIDENT. MAINTENANCE REMOVED AND REPLACED THE NR 1 FOG. PERFORMED A SHAKEDOWN OF WIRES BEHIND THE NR 1 EADI NR 1 FOG. ALSO, REPLACED NR 1 INSTRUMENT AMP. THE OPERATIONAL CHECK WAS GOOD PER ALL APPLICABLE MANUALS AND THE AIRCRAFT WAS RETURNED TO SERVICE.