As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
TYS - A/C WAS ABE TO ORD WHEN THE CREW GOT A WARNING INDICATION OF LAV SMOKE WITH SOME HAZE IN CABIN. A/C WAS FERRIED TO TYS WHERE MAINTENANCE REMOVED AND REPLACED THE NR 1 ENGINE IAW 145AMM 71-00-00. A/C WAS RELEASED AFTER OPS CHECKS AND LEAK CHECKS.