As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AFTER TAKEOFF FROM KCOF, CAPTAINS ADI GYRO "OFF FLAG" AND NR 1 COMPASS "OFF FLAG" APPEARED. CREW RETURNED AIRCRAFT TO KCOF AND LANDED WITHOUT INCIDENT. MAINTENANCE REMOVED AND REPLACED FOG GYRO PER ALL APPLICABLE MANUALS AND AIRCRAFT WAS RETURNED TO SERVICE.