Emb-175 first officer reported a 'dirty socks' odor on multiple flights on same aircraft.

Attributes
ACN	1659353
Time
Date	201906
Local Time Of Day	0601-1200
Place
Locale Reference	ZZZ.TRACON
State Reference	US
Aircraft 1
Make Model Name	EMB ERJ 170/175 ER/LR
Operating Under FAR Part	Part 121
Flight Phase	Initial Approach
Flight Plan	IFR
Person 1
Function	First Officer Pilot Flying
Qualification	Flight Crew Multiengine Flight Crew Air Transport Pilot (ATP) Flight Crew Instrument
Events
Anomaly	Flight Deck / Cabin / Aircraft Event Smoke / Fire / Fumes / Odor

Narrative:

I operated aircraft X ZZZ-ZZZ1-ZZZ; we encountered the dirty sock smell on both legs. [Days later]; I operated aircraft X again; ZZZ-ZZZ2-ZZZ encountering the dirty sock smell again descending into ZZZ2. The logbook indicated the dirty sock smell had been written up multiple times!

Original NASA ASRS Text

Title: EMB-175 First Officer reported a 'dirty socks' odor on multiple flights on same aircraft.

Narrative: I operated Aircraft X ZZZ-ZZZ1-ZZZ; we encountered the dirty sock smell on both legs. [Days later]; I operated Aircraft X again; ZZZ-ZZZ2-ZZZ encountering the dirty sock smell again descending into ZZZ2. The logbook indicated the dirty sock smell had been written up multiple times!

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.