As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
SMT ENG 1 EEC C2 SHOWS. GROUNDED - YES. REF B737-9 IFIM G73-10-00-810-803 NO CORRELATED FAULTS FOUND IN PRESENT LEGS EXISTING OR FAULT HISTORY PERFORMED ENGINE IDLE SYSTEM TEST ON ENG 1 NO LATCHED SMT MESSAGES DETERMINED TO BE INTERMITTENT.