As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ETOPS SIGNIFICANT SYSTEM, FRM: 27480300. EICAS MESSAGE "STAB TRIM" DISPLAYED AND STAB TRIM LIGHT ILLUMINATED. STABILIZER TRIM OPERATES AT 1/2 SPEED. TROUBLESHOT PER FIM 27-48-00. NO MESSAGES OR FAULTS FOUND. SYSTEM OPERATES NORMAL. OK FOR SERVICE.