Narrative:

I noticed a significant dirty sock smell on departure as we lifted off. The captain immediately concurred. We identified the smell as pyrolyzed engine oil; and I donned my oxygen mask at about 1;000 feet AGL. I coordinated with the captain to call the flight attendants; who did not report any unusual odors. We discussed our options; including a possible return to the departure airport. By this time we were about four minutes into the flight. As we passed 10;000 feet; the odor dissipated; which I confirmed by taking the mask off momentarily and checking for the odor. We elected to continue the flight. I noticed the odor again on descent around 10;000 feet. It was not as strong this time. We turned off pack 1 and the smell dissipated immediately. We continued the flight without further incident and wrote up the fume event upon shutdown.provide training to maintenance personnel; pilots; and flight attendants on the hazards and causes of engine oil fume events. Develop a checklist for pilots and cabin crew to address engine oil fume events when they occur in flight. Investigate the physical causes of these events and attempt to correct the underlying mechanical issue. Correct the information that appeared in company publications blaming engine oil fume events - and the illness caused by these events - on coffee. Ensure the entire organization from top to bottom is educated on this hazard and not conflating engine oil fume events with pack contamination or other odors.

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Original NASA ASRS Text

Title: EMB-175 First Officer reported a dirty sock smell on departure that initially subsided; but returned on descent.

Narrative: I noticed a significant dirty sock smell on departure as we lifted off. The Captain immediately concurred. We identified the smell as pyrolyzed engine oil; and I donned my oxygen mask at about 1;000 feet AGL. I coordinated with the Captain to call the flight attendants; who did not report any unusual odors. We discussed our options; including a possible return to the departure airport. By this time we were about four minutes into the flight. As we passed 10;000 feet; the odor dissipated; which I confirmed by taking the mask off momentarily and checking for the odor. We elected to continue the flight. I noticed the odor again on descent around 10;000 feet. It was not as strong this time. We turned off Pack 1 and the smell dissipated immediately. We continued the flight without further incident and wrote up the fume event upon shutdown.Provide training to Maintenance Personnel; pilots; and flight attendants on the hazards and causes of engine oil fume events. Develop a checklist for pilots and cabin crew to address engine oil fume events when they occur in flight. Investigate the physical causes of these events and attempt to correct the underlying mechanical issue. Correct the information that appeared in company publications blaming engine oil fume events - and the illness caused by these events - on coffee. Ensure the entire organization from top to bottom is educated on this hazard and not conflating engine oil fume events with pack contamination or other odors.

Data retrieved from NASA's ASRS site and automatically converted to unabbreviated mixed upper/lowercase text. This report is for informational purposes with no guarantee of accuracy. See NASA's ASRS site for official report.