What was found
DURING TAKEOFF, RMU NR 2 & THE NR 2 PFD BOTH WENT BLANK. AFTER A COUPLE SECONDS THE PFD WENT TO A RED X AND THEN ABOUT 10 SECONDS LATER A NORMAL DISPLAY CAME BACK ON. THE RMU TOOK ABOUT ONE MINUTE TO COME BACK ON & HAVE A NORMAL DISPLAY. FOUND NR 2 PFD INCORRECTLY RACKED. REMOVED AND RE-RACK NR 2 PFD IAW CESSNA 560 M.M. CH 34-23-02. REMOVED NR 2 RMU CHECKED CONNECTOR FOR SECURITY REINSTALLED IAW CESSNA 560 M.M. CH 23-13-00. BOTH SYSTEMS OPERATED NORMALLY