As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING FADEC SYSTEM TEST, TEST 12 ACTUATOR TEST FAILS DISPLAY LPTACC DEMAND AND POS SIGNALS DISAGREES MAINT MSG 75-20532. GROUNDED - YES. REPLACED #2 ENGINE EEC PER B737-800 AMM 73-21-60, FADEC SYSTEM TESTS PASS. RAN TEST 12 ACTUATOR TEST. NO FAULTS NOTED.