As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
WHILE PERFORMING TASK CARD 7827300 INTERROGATE THE FMC CDU FOR ENGINE FAULTS. GROUNDED - YES. ENG #2 BITE TEST SHORT TIME MSG NBR 73-31732 CHANNEL IN CONTINOUS REST ENG #2 BITE TEST FAULT HISTORY FOR CH. B ONLY. CH. A EEC DATA NOT AVAILABLE CAN NOT ACCESS CHANNEL A. ACCOMPLISHED FIM 73-05 TASK 803. PER FIM REMOVED AND REPLACED #2 ENGINE EEC.REF. AMM 73-21-60/401. #2 ENGINE FADEC SYSTEM TEST NORMAL. REF. AMM 73-21-00-700-802-F00.