As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DFW - FLT 3544 - PITCH TRIM SYSTEM 1-2 INOPERATIVE ON EICAS. COMPLIED WITH ETN EB27-022 AND PERFORMED TROUBLESHOOTING IAW EMB FAULT ISOLATION MANUAL. REMOVED AND INSTALLED HSCU. OPERATIONAL CHECK GOOD IAW 27-40-01. AIRCRAFT RETURNED TO SERVICE. (M)