As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DTW - FLT 9951 - AUTO PILOT VERTICAL SPPED WHEN COMMANDED UP OR DOWN THERE IS NO CONTROL UP TO 1500 FT PER MIN GOES DIRECTLY TO 1500 FT PER MINUTE. REMOVED AND REPLACED PITCH AXIS COMPUTER, OPS CHECKED GOOD PER DC9 MM 22-13-01. NO OTHER DISCREPANCIES NOTED. (M)