What was found
DURING PREFLIGHT, THE DEMULTIPLEXER UNDER SEAT 25F BEGAN PRODUCTING ELECTRICAL SMOKE. REPLACED AFT INBOARD SECTION TIMER DECODER, SEAT HARNESS FROM 27 TO 26FG, 26 TO 25FG AND 25 TO 24FG. ALSO, REPLACED SEAT.
As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
DURING PREFLIGHT, THE DEMULTIPLEXER UNDER SEAT 25F BEGAN PRODUCTING ELECTRICAL SMOKE. REPLACED AFT INBOARD SECTION TIMER DECODER, SEAT HARNESS FROM 27 TO 26FG, 26 TO 25FG AND 25 TO 24FG. ALSO, REPLACED SEAT.