As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
#1 ENGINE HAS LONG TIME FAULT MESSAGE NBR 73-20771 THE PS3 SIGNAL IS OUT OF RANGE. DEFERRED PER TASK CARD 78273000. GROUNDED - YES. REPLACED #1 ENGINE EEC REF B737-800 AMM 73-21-60-400-801-F00. ACCOMPLISHED FADEC SYSTEM TEST. ALL TESTS PASS REF AMM 73-21-00-700-802-F00. REPAIR CONFIRMATION PASSES REF B737-800 FIM 73-26 TASK 803. GROUND VERIFICATION SUCCESSFUL..