As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DTW - FLT 237 - FOUND HORIZONTAL STABILIZER AUDIO SIGNAL IS NOT SOUNDED AND NO VOCAL WARNING IN AUTO PILOT MODE, AND MANUAL IN FLIGHT AND GROUND OPS. REMOVED AND REPLACED HORIZONTAL MOTION SENSOR (U10-120) AND OPS NORMAL AS PER MM 27-40-11. (M)