As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
WHILE ON A MAINTENANCE FLIGHT, REPORTED SMOKE IN THE COCKPIT ON TAKEOFF. ACFT RETURNED FOR FURTHER INSPECTION. INSPECTION OF THE LT ENGINE REVEALED A LEAKING COMPRESSOR SEAL WHICH WAS INTRODUCING OIL INTO THE BLEED AIR SYS HIGHER POWER SETTINGS. THE ENGINE IS TO BE REMOVED FOR REPAIR.