What was found
OUT OF KMIA/SPIM, NR 1 COMPASS SHOWED 15 DEGREES OFF STANDBY AND NR 2 COMPASS SHOWED 15 DEGREES OFF COURSE, HEADING LIGHT ON STEADY IN INSTRUMENT COMPARATOR. FOUND NR 2 DG FAILED SLAVE CHECK, REPLACED NR 2 DIRECTIONAL GYRO. REPLACED NR 1 DG, AND NR 1 INSTRUMENT AMP RACK. PERFORMED OPS CHECK PER MM 34-21-0 AND 34-21-1. AIRCRAFT CHECKED EXTENSIVELY, BOTH SYSTEMS PERFORMED OK. (X)