As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ORD INFLIGHT T844/30AUG - ACARS PRINTER STARTED SMOKING. PULLED PRINTER CIRCUIT BREAKERS ON OVERHEAD PANEL. OPENED PRINTER AND PAPER ROLL NOT BURNED. LANDED ORD WITHOUT INCIDENT. REPLACED ACARS PRINTER AND INSPECTED AREA. NO DAMAGE. SYSTEM GROUND CHECKED NORMAL OPERATION.