As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DFW - FLT 3619 - PILOT REPORTED VIBRATION IN CONTROL COLUMN WHEN PASSING THROUGH 24,000 FEET. INSPECTED AND FOUND ELEVATOR TENSION REGULATOR BAD CAUSING CONTROL CABLES TO SLACK AND BECOME FRAYED. REMOVED AND REPLACED ELEVATOR TENSION REGULATOR AND BOTH CONTROL CABLES. OPS CHECK AND FUNCTIONAL CHECK FLIGHT WERE SATISFACTORY AIRCRAFT RETURNED TO SERVICE. (M)