As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AUTOTHROTTLE WILL NOT STAY ENGAGED, DURING TAKEOFF THE #2 THRUST LEVER LAGGED BEHIND #1. HAD TO BE PUSHED UP MANUALLY. GROUNDED - YES. ACCOMPLISHED B737-800 FIM 22-31 TASK 801 NO FAULTS FOUND DURING BITE CHECK. COMPLETED ALL A/T INTERACTIVE TESTS ALL TESTS PASS. CAT 3 AUTOLAND REINSTATED AND AUTHORIZED.