As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AUTOTHROTTLES DISENGAGED AFTER TAKE OFF AND WOULD NOT RE-ENGAGE. ACFT GROUNDED. INFLIGHT FAULT REVIEW SHOWS FLIGHT LEG 09 ASM NR 1 FAULT. NO OTHER A/T FAULTS LOGGED WITHIN PREVIOUS 20 FLIGHT LEGS. ACCOMPLISHED A/T SERVO MOTOR TEST. OPS NORMAL WITH NO FAULTS. ADDITIONALLY ACCOMPLISHED BG 43, DFCS LRU REPLACEMENT TEST FOR A/T. ALL TESTS PASS.