As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FLT 503 - KDAY-KOKC - IN FLIGHT, COPILOT RMI (CAPTAINS HIS COMPASS NR 1) SYNCRONIZATION INFLIGHT 12 DEGREES OFF FROM COMPASS NR 2 AND MAGNETIC COMPASS. RETURNED KDAY WITHOUT FURTHER INCIDENT. REMOVED AND REPLACED NR 1 FLUX VALVE IAW B727 MM 34-21-12. OPERATIONAL CHECK GOOD IAW B727 MM 34-21-0. NO DEFECTS NOTED. RETURNED TO SERVICE. (M)