As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ORD - FLT 3972 - ON FINAL RECEIVED PITCH TRIM 1/2 INOPERATIVE WARNING ON EICAS WITH MASTER WARNING. PERFORMED TROUBLESHOOTING PITCH TRIM 1/2 INOPERATIVE IAW FAULT ISOLATION MANUAL AND ETN EB-27-022R1. REPLACED HSCU EMB AMM 27-40-01. OPS CHECK GOOD. A/C RETURNED TO SERVICE. (M)