As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
UNSCHD STAB TRIM FOR APPROXIMATELY 2 SECONDS ON EICAS, PASSING 8000 FT DURING DESCENT SPEED 210 KTS FLAP 1. REPLD C HYD PRESS SWITCH S29. PRESSURE SWITCH LEAK CKS GOOD. PERFORMED OPS CK OF ADP REF AMM 29-11-03-4-0. T/S UNSCHED STAB TRIM REF FIM 27-09 FAULT TREE 812 AND 811. STAB TRIM OPS CKS GOOD. NO FAULTS ON STCM OR MCDP TEST 65.