As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
CTR SYS WILL NOT TRIM NOSE DOWN. ACFT WILL NOT TRIM NOSE DOWN WITH CTGTR SYS, NOSE UP OK. SINGLE CHANNEL CHECKS OK, LT SYS TRIMS NORMAL, ALT TRIMS NORMAL. OPS CHK INDICATES RT WILL NOT TRIM IN PRIMARY AND ALTERNATE. REPLACED RT STAB TRIM LOCKOUT MODULE. ACFT WILL NOT TRIM NOSE DOWN ON RT PRIMARY CHANNEL. NO CLICK AT SWITCH. REPLACED RT STAB TRIM LIMIT SWITCH AND POS TRANSMITTER.