A321 pilot reported diverting to an alternate airport after noticing a burning odor.

Attributes
ACN	1713525
Time
Date	201912
Local Time Of Day	1201-1800
Aircraft 1
Make Model Name	A321
Operating Under FAR Part	Part 121
Flight Phase	Cruise
Flight Plan	IFR
Component
Aircraft Component	Cooling Fan any cooling fan
Person 1
Function	Pilot Not Flying
Qualification	Flight Crew Air Transport Pilot (ATP) Flight Crew Instrument Flight Crew Multiengine
Events
Anomaly	Aircraft Equipment Problem Less Severe Flight Deck / Cabin / Aircraft Event Smoke / Fire / Fumes / Odor

Narrative:

During cruise at FL350 we heard a noise and then [noticed] a burning odor in the cockpit and also in the cabin according to the flight attendants. Because the odor persisted and it was strong we diverted to [an alternate airport]. Descending and running the smoke/avionics/fumes check list we got avionics vent ECAM message. Eventually the odor dissipated and we landed safely.maintenance told us that they found the avionics vent fan failed.

Original NASA ASRS Text

Title: A321 pilot reported diverting to an alternate airport after noticing a burning odor.

Narrative: During cruise at FL350 we heard a noise and then [noticed] a burning odor in the cockpit and also in the cabin according to the flight attendants. Because the odor persisted and it was strong we diverted to [an alternate airport]. Descending and running the Smoke/Avionics/Fumes check list we got Avionics Vent ECAM message. Eventually the odor dissipated and we landed safely.Maintenance told us that they found the Avionics Vent Fan failed.

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.