As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
THE HORIZONTAL STABILIZER JACKSCREW WAS FOUND TO HAVE PITTING CORROSION ON THE UPPER THREE THREADS. THE 26TH THREAD FROM THE BOTTOM OF THE JACKSCREW WAS ALSO NOTED TO BE CHIPPED. MAINTENANCE REPLACED THE JACKSCREW ASSEMBLY IAW DC-9 MM 27-40-01.