What was found
SHORTLY AFTER TAKEOFF, THE PAXS INDICATED SMOKE IN THE REAR CABIN AREA WHICH THE CREW SMELLED AS WELL. THE ACFT DECLARED EMER & DIVERTED. THE ACFT LANDED SAFELY & WAS MET BY FIRE DEPARTMENT. CONFIRMED NO FIRE OR SMOKE EXISTS & PAXS DEPARTED PLANE. MX WAS DISPATCHED TO ACFT WHERE TROUBLESHOOTING COMMENCED. TROUBLESHOOTING FOUND THE NR 1 ENG TO BE OVER SERVICED WITH OIL WHICH MIGRATED THROUGH THE BLEED AIR DUCTS SOAKING THE AIR CYCLE SOCK. FURTHER TROUBLESHOOTING FOUND NO OTHER DISCREPANCIES. ALL AFFECTED BLEED AIR DUCTING & SYS WAS CLEANED, THE ENG OIL WAS SERVICED TO PROPER LIMITS & GND AS WELL AS FLIGHT CHECKS PROVED SYS TO BE FUNCTIONING NORMALLY WITH NO OIL SMELL OR SMOKE INDICATED. SYS WILL BE MONITORED FOR ANY FUTURE ISSUES.