As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AIR CONDITIONER SYSTEM PUTS OUT PUTRID ODOR FOR 2-3 MINUTES AFTER ENGINE START THROUGHOUT AIRCRAFT. DISAPPEARS AFTER THIS PERIOD. RETURNS ON FINAL APPROACH AT LOW POWER SETTINGS. ECS OPERATED FOR 20 MINUTES TO PURGE BAD ODOR. RAN AIRCRAFT AT LOWER POWER SETTINGS WITH NO ODOR NOTED. NO PARTS REPLACED. OPERATIONAL CHECKS GOOD. AIRCRAFT RETURNED TO SERVICE.