What was found
AIRCRAFT WAS GNDED. AIR INTERRUPT, EMER DECLARED, LANDING UNEVENTFUL & ACFT OVERWEIGHT. DURING CLIMB, FLIGHT ATTENDANT REPORTED SMOKE FROM TAIL CONE AREA. ACCOMPLISHED CABIN ODOR TROUBLESHOOTING CARD MCM 21-96-01 & FOUND LT AIR CYCLE MACHINE LEAKING OIL. R & R AIR CYCLE MACHINE IAW MCM 21-94-01.