As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
NOXIOUS BURNED OIL ODOR IN COCKPIT DURING GROUND OPS. [SUP 05-03-07] GAINED ACCESS FOR APU FOUND OIL LEAK AT CHIP DETECTOR PLUG . BURN OIL TRAVELING IN THE CABIN. FIXED AND CLEANED OIL LEAK. OPS CHECKED AND LEAK GOOD. MAINTENANCE PERFORMED IAW CESSNA CITATION 750-AMM 49-10-00.