As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ELEVATOR TRIM FROZE INFLIGHT AT CRUISE ALTITUDE. DURING DESCENT ELEVATOR TRIM OPERATES NORMAL. LUBRICATED THE LT & RT ELEVATOR TRIM JACKS. ELEVATOR TRIM OPERATIONAL CHECKS WERE GOOD. ACFT WAS FERRIED TO THE MFG SERVICE CENTER FOR FURTHER EVALUATION DUE TO REPEAT WRITE UP. REPLACED THE LT & RT ELEVATOR TRIM ACTUATORS. OPERATIONAL CHECKED GOOD. ACFT WAS RTS. LT TRIM ACTUATOR OFF PN 130-524052-17 & SN 52170245-002. RT TRIM ACTUATOR OFF PN 130-524052-19 & SN 52201053-001.