As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AT TURNS OFF CLIMBING THROUGH ACCEL HEIGHT. NO EICAS MESSAGES, ONLY AURAL ALERT. SILENCE ALER, AT ON AND OPS BACK TO NORMAL (AUTOTHROTTLE CHANNELS – BOTH INOPERATIVE). REMOVED FROM SERVICE. REMOVED AND REPLACED THRUST CONTROL QUADRANT IAW E175 AMM 76-11-000/400-801-A OPS TEST GOOD. PERFORMED AUTO THROTTLE OPS TEST IAW E175 AMM 22-31-00-710-801-A OPS TEST GOOD. RETURNED TO SERVICE.