What was found
ON TAKEOFF, THE HEADING COMPARATOR CAME ON WITH THE A 10 DEG SPLIT BETWEEN CA & FO MAIN COMPASSES. ON INITIAL RIGHT TURN THE CA RMI COMPASS WAS FROZEN AND REMAINED FROZEN FOR ENTIRE FLIGHT. F/O COMPASS WAS 10 DEG OFF FROM WET COMPASS WITH THE CA COMPASS IN EXCESS OF THAT. REMOVED AND REPLACED NR 1 DG IAW WITH DC8-MM CH 34-21-1 OPERATIONAL CHECKS GOOD THIS TIME. REMOVED AND REPLACED NR 1 RADIO MAGNETIC IND IAW DC8-MM CH 34-21-0, OPERATIONAL CHECK GOOD THIS TIME. REMOVED AND REPLACED NR 2 DG IAW WITH DC8 MM CH 34-21-1, OPERATIONAL CHECK GOOD THIS TIME.