As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING TAKEOFF ROLL HEADING COMPARATOR DISPLAYED WITH HEADING OFF 3 DEGREES. AFTER ROTATION CAPTAINS HEADING OFF 60 DEGREES AND ATTITUDE 45 DEGREES OFF. WINDSHEAR WARNINGS AND MAP FAILED ON NR 2. RETURNED TO DEPARTURE. FALSE WINDSHEAR WARNING ON FINAL. REPLACED THE NR 1 IRU IAW AMM. REPLACED CAPTAIN`S RDMI IAW AMM DUE TO INTERMITTENT HDG FLAG. OPS CHECKED GOOD. PERFORMED TEST OF NR 2 EFIS MAP MODE IAW AMM.