As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AFTER TAKEOFF FROM WSAP NR 1 COMPASS PRECESSING 8-10 DEGREES IN APPROX. 1 1/2 MINUTES. CREW RETURNED TO WSAP AND LANDED WITHOUT INCIDENT. AN INSPECTION IS ON GOING. WILL PROVIDE MORE INFORMATION AS IS BECOMES AVAILABLE. MAINTENANCE REMOVED AND REPLACED NR 1 DIRECTIONAL AND VERTICAL GYRO PER ALL APPLICABLE MANUALS. OPERATIONAL AND LEAK CHECK GOOD. AIRCRAFT WAS RETURNED TO SERVICE.