As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
SEA FLIGHT NR 2341: POWER PLANT MESSAGE ON ED AFTER ROTATION. NO OTHER CAUTIONS OR WARNING LIGHTS WERE OBSERVED. ALL ENGINE INDICATIONS WERE NORMAL. POWER LEVERS WERE ALSO MATCHED THROUGHOUT THE FLIGHT. AIRCRAFT RETURNED TO FIELD. MAINTENANCE INTERROGATED ED'S AND FOUND FAULT CODE 84 ON THE NR 1 ENGINE. REMOVED AND REPLACED PEC IAW Q400 AMM 61-20-36 PAGES 401-407. PERFORMED POWER ASSURANCE RUN PER QX MTC 6710005. OPS CHECK GOOD. AIRCRAFT RETURNED TO SERVICE.