What was found
FLIGHT EXPERIENCED A VENT EXTRACT FAULT MESSAGE ON ECAM AND ACRID ODOR ON THE FLIGHT CREW. THE ACFT DIVERTED, UPON INVESTIGATION, THE EXTRACT FAN WAS FOUND FAILED. MEL 21-26-02-01 WAS APPLIED AND THE ACFT DEPARTED WITH NO FURTHER PROBLEMS, FAN WILL BE REPLACED AT NEXT MAINTENANCE OPPORTUNITY.