As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FLT 4100 - ON THE GROUND WHILE IN HOTEL MODE FOR A FLIGHT FROM ATL TO TRI, CREW EXPERIENCED SMOKE IN THE CABIN. MAINTENANCE FOUND THE RIGHT ENGINE EMITTING OIL OUT OF THE CASE VENT DRAIN. MAINTENANCE REMOVED AND REPLACED THE RIGHT ENGINE 2.5 SWITCHING VALVE. OPERATIONAL CHECKS WERE GOOD. AIRCRAFT RETURNED TO SERVICE. (M)