As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AIRCRAFT WAS GROUNDED: AN EMERGENCY WAS DECLARED DUE TO: STABILIZER EICAS MESSAGE DURING FLIGHT. AIRCRAFT LANDED SAFELY AT DFW WITHOUT FURTHER INCIDENT. FOUND M/MSG 27-13301 AND 27-13302 ON CMCF. ACCOMPLISHED. PER FIM DMC-B787-A-27-40-F1-22A-421A-A AND DMC B787-A-27-40-F1-23A-42 1A-A HORIZONTAL STABILIZER SYSTEM TEST PASSED. STATUS MSG GONE. OK FOR SERVICEABLE.