As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AUTOTHROTTLE DISCONNECT WITH AUTOTHROTTLE SPLIT @ 12,000 FT. DURING DESCENT. RE-ENGAGED W/ NO FURTHER MALFUNCTION. GROUNDED - YES. ACCOMPLISHED A/T OPERATIONAL TEST REF B737-9 AMM 22-31-00 WITH NO FAULTS FOUND. ACCOMPLISHED A/T SYSTEM TEST WITH NO FAULTS FOUND ALL TEST PASS.