As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AIRCRAFT NOT GROUNDED: PILOT REPORTS DURING BOARDING A PASSENGER SAW SPARKS COMING FROM ELECTRONICS BOX UNDER SEAT 25A. ***SUPPLEMENTAL INFORMATION: MAINTENANCE REMOVED AND REPLACED QSEBS AT ROWS 25ABC & 26ABC IAW AMM 44-24-32. REMOVED AND REPLACED CABLE ASSY AT ROWS 25ABC & 26ABC IAW AMM 25-21-61. ALL OPS CHECK GOOD.*** (CLOSED)