What was found
AIRCRAFT RETURNED OF FLIGHT, DURING ROTATION HEARD A LOUD NOISE IN THE NOSE LANDING GEAR, LOOSING AHRS 2 WITH HEADING, HORIZON LIGHTS TURNED ON, FMA AND RIGHT ND WITHOUT INFORMATION. AHRS 2 AND 3 WERE SWAPPED IAW MM 34-21-10 AND VISUAL INSPECTION OF NLG WAS PERFORMED WITHOUT DAMAGE DETECTED IAW MM 32-20-00. SYMBOL GENERATOR AND AHRU 2 WERE REPLACED IAW MM 34-21-10, TESTED CORRECT.