As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
SMOKE APPEARED IN CABIN AFTER ROTATION. RETURNED TO SAME AIRPORT. IT APPEARS A COMPRESSOR SEAL LEAK IN THE LT ENGINE ALLOWED TURBINE OIL TO ENTER THE POWER SECTION, BURN AND CREATE ENVIRONMENTAL SMOKE. OIL LEAK WAS DETERMINED TO BE WITHIN ALLOWABLE LIMITS. (AL01200501682)