As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
PERFORMED TC78273000, NR 1 ENGINE, FOUND FAULT 73-31441, DEU 2 DATA IS MISSING. ACFT GROUNDED. PERFORMED FIM 73-24 TASK 815. BOTH ENGINES EEC TEST PASSED. IN ADDITION PERFORMED ENGINES 1 AND 2 GROUND RUNS. ACTIVE FAULT 73-31441 CLEARED. NO NEW FAULTS LOGGED. ENGINE RAN, IAW AMM 71-00-00/501. PERFORMED BOTH ENGINES EEC TEST AFTER RUN. SYSTEM CHECKED NORMAL.