What was found
FLT 7971 - IAD - MAIN PITCH TRIM INOP DURING CLIMB. MAINTENANCE REMOVED AND REPLACED THE HORIZONTAL STABILIZER CONTROL UNIT. OPS CHECKED GOOD.
As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
FLT 7971 - IAD - MAIN PITCH TRIM INOP DURING CLIMB. MAINTENANCE REMOVED AND REPLACED THE HORIZONTAL STABILIZER CONTROL UNIT. OPS CHECKED GOOD.