As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AUTOTHROTTLES WILL NOT ENGAGE. GROUNDED - YES. MX MSG 22-31687 LOGGED ON FLT LEGS 10 AND 13 FOR ASM 1. ACCOMPLISHED B737-900 FIM 22-32 TASK 819 INITIAL EVALUATION. SERVO MOTOR TEST PASSES. TORQUE TEST PASSES REF B737-900 AMM 22-31-00-710-802.