A319 captain reported a return to gate after noticing 'dirty socks' odor during taxi for departure.

Attributes
ACN	1658322
Time
Date	201906
Local Time Of Day	0001-0600
Place
Locale Reference	ZZZ.Airport
State Reference	US
Environment
Flight Conditions	VMC
Aircraft 1
Make Model Name	A319
Operating Under FAR Part	Part 121
Flight Phase	Taxi
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 Total 23870
Events
Anomaly	Aircraft Equipment Problem Less Severe Flight Deck / Cabin / Aircraft Event Smoke / Fire / Fumes / Odor

Narrative:

The aircraft was on terminal air conditioner for prior smoke/odor/fume event. After both engines started a 'dirty sock' type odor was noticed in the cockpit. The smell dissipated somewhat during initial taxi. The flight attendants did not notice any odor in the cabin. We continued the taxi; but when we were #1 for takeoff; the odor was still present. QRH procedure followed and returned to gate.

Original NASA ASRS Text

Title: A319 Captain reported a return to gate after noticing 'dirty socks' odor during taxi for departure.

Narrative: The aircraft was on terminal air conditioner for prior smoke/odor/fume event. After both engines started a 'dirty sock' type odor was noticed in the cockpit. The smell dissipated somewhat during initial taxi. The flight attendants did not notice any odor in the cabin. We continued the taxi; but when we were #1 for takeoff; the odor was still present. QRH procedure followed and returned to gate.

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.