What was found
(CAN) PILOTS REPORTED SMOKE IN CABIN AFTER TAKEOFF, 1500 - 2000 FEET. CREW PUT MASK ON & LANDED. ENG HAD A RECENT HSI. THE TROUBLESHOOTING SHOWED OIL AROUND THE INNER DIAMETER OF THE FAN DISC & IN THE EXHAUST BREATHER OUT PORT & ON THE FMU DRAIN. OIL CONSUMPTION TEST WILL BE PERFORMED. MFG WILL INVESTIGATE TO ESTABLISH ROOT CAUSE & PROVIDE INFORMATION THROUGH SUBSEQUENT SERVICE DIFFICULTY REVIEW MEETING & SUPPORTING DOCUMENTS OR OTHER AGREED UPON COMMUNICATIONS.