As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
WINDSHEAR WARNING ON TAKEOFF, TAKEOFF REJECTED AT 85 KTS. ACCOMPLISHED FIM TASK 34-43-00 REPLACED WXR WAVEGUIDE SWITCH PER MM 34-43-07 ACCOMPLISHED TAKEOFF POWER TEST PER MM 71-00-00 TO VERIFY NO ERRONEOUS WINDSHEAR WARNINGS EXIST AND OPS GHEGK WXR CHECKS NORMAL PER MM 34-43-00. THE AIRCRAFT WAS GROUNDED.