As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
TUS - CREW REPORTED POWER PORT SYSTEM ON SEAT 12B SPARKED. CIRCUIT BREAKER PULLED TO STOP SPARKS. EMERGENCY DECLARED, LANDED TUS WITHOUT INCIDENT. REPLACED THE IN SEAT POWER SOURCE AND THE OUTLET ASSEMBLY. SYSTEM GROUND CHECKED NORMAL OPERATION.