As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ARRIVED AT AIRCRAFT IN SOFT POWER DOWN, TURNED BAT 1&2 ON - THEN ADJUSTED SEAT VERTICALLY. SEAT BEGAN TO ARC AND SMOKE. THEN CEASED TO WORK. REMOVED FROM SERVICE. REMOVED AND REPLACED PILOT'S SEAT ASSEMBLY IAW ERJ-175 AMM 25-11-01-000-801-A AND 25-11-01-400-801-A. OPS CHECK GOOD. ODORS AND SMOKE DID NOT RETURN. PERFORMED GVI OF AIRFRAME WIRING AND ELECTRICAL COMPONENTS OF FLIGHT DECK. NO DEFECTS NOTED. RETURNED TO SERVICE.