What was found
THE PILOT WAS CRUISING IN BAD WEATHER WHEN HE EXPERIENCED SEVERE TURBULENCE. SHORTLY THEREAFTER, THE #1 AHRS FAILED, INDICATING A RED X ACROSS THE SCREEN. THE PILOT DECLARED AN EMERGENCY AND DIVERTED INTO BIRMINGHAM, ALABAMA AIRPORT (BHM). UPON APPROACH INTO BHM, THE #1 AHRS ENERGIZED AND OPERATED NORMALLY THROUGHOUT APPROACH AND LANDING. SUBSEQUENT GROUND TESTS OF THE SYSTEM WERE ALL NORMAL. AFTER MAINTENANCE DETERMINED NO FAULTS FOUND WITH THE #1 AHRS SYSTEM, THE AIRCRAFT WAS RETURNED TO HOME BASE.