As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
WHILE PERFORMING SCHEDULED MAINTENANCE TASK CARD #05-020-01 FOUND LATCHED MESSAGE ENG 1 EEC C2. GROUNDED - YES. TROUBLESHOT ENG 1 EEC C2 MAINTENANCE MESSAGE PER IFIM G73-10-00-810-803. DID NOT FIND CORRELATED MAINENANCE MESSAGE. ERASED LATCHED MESSAGE AND PERFORMED ENGINE IDLE SYSTEM TEST PER AMM 71-00-00-700-808-G00. SYSTEM TEST PASSED. SMT MESSAGE DID NO RE APPEAR. NO FURTHER ACTION REQUIRED.