B757 captain reported a 'dirty sock' odor during climb which dissipated and resumed on initial appro...

Attributes
ACN	1679741
Time
Date	201908
Environment
Flight Conditions	VMC
Aircraft 1
Make Model Name	B757 Undifferentiated or Other Model
Operating Under FAR Part	Part 121
Flight Phase	Takeoff
Flight Plan	IFR
Person 1
Function	Captain Pilot Flying
Qualification	Flight Crew Air Transport Pilot (ATP) Flight Crew Instrument Flight Crew Multiengine
Experience	Flight Crew Last 90 Days 117 Flight Crew Total 2139.65 Flight Crew Type 1890.92
Events
Anomaly	Aircraft Equipment Problem Less Severe Flight Deck / Cabin / Aircraft Event Smoke / Fire / Fumes / Odor

Narrative:

On takeoff until approximately 22;000 feet and on approach starting around 18;000 feet to landing; there was a very strong dirty sock/gym sock smell. This is consistent with the description of pyrolyzed oil entering the ecs system and is at the times that this event would normally occur. Maintenance was notified; and a description of the smell was notated on the appropriate fume form.

Original NASA ASRS Text

Title: B757 Captain reported a 'dirty sock' odor during climb which dissipated and resumed on initial approach.

Narrative: On takeoff until approximately 22;000 feet and on approach starting around 18;000 feet to landing; there was a very strong dirty sock/gym sock smell. This is consistent with the description of pyrolyzed oil entering the ECS system and is at the times that this event would normally occur. Maintenance was notified; and a description of the smell was notated on the appropriate fume form.

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.

B757 captain reported a 'dirty sock' odor during climb which dissipated and resumed on initial approach.