B757 Undifferentiated or Other Model
Flight Crew Air Transport Pilot (ATP); Flight Crew Instrument; Flight Crew Multiengine
Flight Crew Last 90 Days 130; Flight Crew Total 2184; Flight Crew Type 1936
Situational Awareness
Aircraft Equipment Problem Less Severe; Deviation / Discrepancy - Procedural Published Material / Policy; Flight Deck / Cabin / Aircraft Event Smoke / Fire / Fumes / Odor
General None Reported / Taken
Aircraft
During takeoff with a full thrust setting; we experienced a very pungent dirty gym sock smell on takeoff around 100kts until 14;000 ft. During climb we also entered visible moisture; which most likely exasperated the smell/fumes as well. This is consistent with the guidance currently available for this type of event; which occurs at high power setting on takeoff; or during thrust reduction during a descent. Moisture entering the engines will normally pick up small oil particulates; and they then can pyrolyze entering the ECS (Environmental Control System) system. This is also prevalent during any event; which can allow small oil particles to become heated to an extreme temperature to form a mist when entering the ECS.
B757 Captain reported 'pungent dirty gym sock smell' on takeoff to 14;000 feet.