What was found
PITCH TRIM BACKUP INOPERATIVE, WHEN AUTO PILOT ENGAED. PERFORMED TROUBLESHOOTING IAW FIM. R & R THE HORIZONTAL STABILIZER CONTROL UNIT IAW AMM 27-43-02. OPS CHECKED GOOD.
As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
PITCH TRIM BACKUP INOPERATIVE, WHEN AUTO PILOT ENGAED. PERFORMED TROUBLESHOOTING IAW FIM. R & R THE HORIZONTAL STABILIZER CONTROL UNIT IAW AMM 27-43-02. OPS CHECKED GOOD.