As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING CLIMBOUT NOTICED ODOR OF SMOKE FROM CABIN BLEED AIR, ACCOMPLISHED AIR TURNBACK TO DEN. PERFORMED ENGINE RUNS AND APU RUNS, APPLIED BLEED AIR IN AUTO AND MANUAL, ALL INDICATIONS NORMAL. DID NOT OBSERVE THE ODOR OF SMOKE FROM CABIN BLEED AIR DUCT OR IN CABIN, ALL WORK DONE IAW HAWKER 800XP MM CHAPTER 20-00-00 STANDARD PRACTICES.