As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ACFT WAS REPORTED BY PILOTS THAT SMOKE WAS IN THE CABIN FROM THE PACKS AND TURNED OFF RECIRCULATING FANS DIDN'T HELP. IT GOT WORSE. ACFT WAS FERRIED, WHERE MAINTENANCE FOUND THE 0 CARBON SEAL LEAKING. R & R THE 0 CARBON SEAL REF MM 72-25-25. OPS AND LEAK CHECKS GOOD AND WAS RELEASED BACK TO SERVICE.