What was found
INFLIGHT HEADING AND NO AUTO LAND ANNUNCIATORS CAME ON FMA. STANDBY COMPASS INDICATES 52 DEGREES, NUMBER RMI 052 DEGREES, NUMBER 2 RMI 044 DEGREES, NUMBER 1 ND 044 DEGREES, NUMBER 2 ND 052 DEGREES, CAPTS GPS 43 DEGREES, AND F/O'S GPS 052 DEGREES. CONFIRMED NR 1 SYSTEM DRIFTS WITHIN 5 MINUTES OF ATTAINING HEADING. REMOVED AND REPLACED LEFT FLUX VALVE REF MM 34-21-06. OPS CHECK GOOD.