As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AUTO THROTTLES WILL NOT STAY ENGAGED. GROUNDED - YES. RELEASED PER MEL 22-4B, MEL 22-9B, AUTO THROTTLES INOP. ACCOMPLISHED AUTOTHROTTLE BITE AND OPS TEST. NO FAULTS. REMOVED AND REPLACED NR 2 ASM DUE TO FAULT HISTORY ON 4/29/2019 LEG SHOWING FAULT 22-31688 FLAGGED SEVERAL TIMES. ALL REQUIRED TESTS PASSED. REF AMM 22-31-91. THIS CLEARS MEL 22-4B AND MEL 22-99B.