What was found
FLT 579 FROM KMCO TO KPIA, NR 1 GYRO FAILURE ON CLIMBOUT AND NR 2 COMPASS LAGS 20 DEGREES IN TURNS. RETURNED TO KMCO WITHOUT FURTHER INCIDENT. TROUBLESHOT TO A DEFECTIVE ATTITUDE DIRECTION INDICATOR (ADI) ON THE CAPTAINS POSITION. REMOVED AND REPLACED THE CAPTAINS ADI. OPERATIONAL CHECK NORMAL IAW B727 MAINTENANCE MANUAL 34-62-11. REMOVED AND REPLACED NR 2 FLUX VALVE ON RIGHT WING IAW B727 MAINTENANCE MANUAL 34-22-00. OPERATIONAL CHECK NORMAL. AIRCRAFT RETURNED TO SERVICE.