What was found
DURING INITIAL CLIMB BOTH NR 1 AND NR 2 EHSI SHOWED 30 OFF FROM ATC. RED FLAG ON NR 1'S RMI CYCLED ON/OFF, THEN NR 1 EHSI HAD RED HEADING FLAG AND NR 2 RMI HAD RED FLAG CYCLED ON/OFF THEN YELLOW HEADING FLAG COMPARATOR CYCLED ON/OFF. IT EXTINGUISHED WITHOUT CREW ACTION AND DURING TURN TO FINAL BOTH NR 1 AND NR 2 EHSI AND RMI ROTATED TO CORRECT HEADING. MAINTENANCE REINITALIZED NR 1 AHRS SYSTEM. ALL CHECKS GOOD IAW SAAB MM CH 34.