As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AFTER TOUCH DOWN THE AUTO FAIL LIGHT CAME ON. GROUNDED - YES. PERFORMED B737-900 AMM TASK 21-31 827. AUTO FAIL LIGHT REMAINS EXTINGUISHED. PERFORMED DCPC BITE REF B737-900 FIM 21-31 TASK 801. DCPC #1 SYSTEM OK. DCPC #2 HAS FAULT HISTORY OFV LRU FAIL. PERFORMED GROUND TEST ON BOTH DCPC NO FAULTS, BOTH DCPCS SAY SYSTEM OK.