As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
LT ENG EEC C1 AND C2 DISPLAYED. RAN LT ENGINE TWICE. ONLY EICAS MESSAGE DISPLAYED IS EEC C1. BITE TESTED LEFT PIMU. NO FAULTS OR MESSAGES. NO PREVIOUS HISTORY. DEFERRED. REPLACED LT ENGINE EEC PER MM. RAN ENGINE TWICE, BOTH 'A' AND 'B' CHANNEL OPS NORMAL.