As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
SMOKE IN THE CABIN DURING CLIMB. CREW DECLARED EMERGENCY AND RETURNED TO DEPARTING AIRPORT KTMB. MECHANIC NOTICED OIL ACCUMULATING ON RH ENGINE INLET. PRATT & WHITNEY IN PARTNERSHIP WITH WEST STAR TROUBLESHOT TO ENGINE OIL OVER-SERVICE. MECHANICAL DIFFICULTY REPORT SUBMITTED TO CHDO.