As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FOUL SMELL FROM BLEED AIR DUCTING (APU AND ENGINES RUNNING). REPLACED NR1 & NR2 ENGINE P2.2 INTERSTAGE BLEED VALVES IAW AMM TASK 75-31-11-000-801 & -400-801. GROUND RAN ACFT & PERFORMED REMOVAL OF ODOR FROM A/C DUCTS IAW TASK 21-00-00-160-801. NO DEFECTS NOTED. RETURNED TO SERVICE.