What was found
CREW REPORTED UPON LEVELING AT 6,000 FEET MSL IN MODERATE TURBULENCE, BOTH CAPTAIN’S PFD (PRIMARY FLIGHT DISPLAY) AND FIRST OFFICER’S PFD FAILED FOR APPROXIMATELY ONE MINUTE. BOTH WERE DARK SCREENS WITH RED ALT, A/S, ATT AND MAG HDG FLAGS. CREW LANDED WITHOUT FURTHER INCIDENT. MAINTENANCE PERFORMED FUNCTIONAL TEST OF AHRS (ATTITUDE AND HEADING REFERENCE SYSTEM) USING AIRCRAFT MAINTENANCE MANUAL. NO DEFECTS NOTED. AIRCRAFT RELEASED FOR SERVICE.