As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
SFO - EMERGENCY DECLARED ON ACCOUNT OF FLIGHT CONTROL ISSUE-STABILIZER JAMMED UNABLE TO TRIM. RETURNED TO SFO WITHOUT INCIDENT. AIRCRAFT REMOVED FROM SERVICE. AIRCRAFT PRIMARY AND ALT LONGITUDINAL TRIM SEEMED JAMMED IN FLIGHT. REPLACED PRIMARY STABILIZER TRIM RELAYS AND HORIZONTAL STABILIZER ACTUATOR CONTROL POWER UNIT SUPPLY. SYSTEM GROUND CHECK NORMAL OPERATION.