As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
PILOT REPORTED ODOR OF BURNING OIL FROM NR 1 PACK WHEN IT IS POWERED BY ENGINE BLEED. MAINTENANCE PERFORMED TROUBLESHOOTING IAW AMM 21-20-00. PERFORMED ENGINE 1 AND 2 HIGH POWER RUNS WITH NO BURNING ODOR NOTED. ACFT WAS APPROVED FOR RETURN TO SERVICE.