As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING TRANSITION FROM CLIMB TO CRUISE FLIGHT, BOTH CHANNELS OF THE HORIZONTAL STABILIZER TRIM CONTROL SYSTEM FAILED. CREW WAS UNABLE TO RE-ENGAGE THE TRIM SYSTEM. AFTER TRIM DISCONNECT WAS CYCLED ON PILOT'S YOKE, NORMAL TRIM OPERATION WAS RE-ESTABLISHED. MAINTENANCE CONFIRMED INTERMITTENT TRIM DISCONNECT SWITCH ON PILOT'S CONTROL YOKE. SWITCH WAS REPLACED.