In a request made to the Brazilian ANAC and available thru the website www.anac.gov.br/hotran , Air Europa applied for a daily service connecting Madrid, Spain to Buenos Aires with a stop in Salvador, Bahia - Brazil
Considering the request was made with the A332, which is capable to fly non-stop, i believe its a revenue stop rather just a technical (not required) stop.
AE041 MAD 0155 SSA 0455 0555 EZE 1015 - Daily except Saturday
AE042 EZE 1445 SSA 1745 1845 MAD 0700 - Daily except Saturday
AE043 MAD 1415 SSA 1715 1815 EZE 2235 - Saturdays
AE044 EZE 0300 SSA 0600 0700 MAD 1915 - Saturdays
EZE local times may not be correct as i'm not sure about Daylight Savings difference
Effective date: November, 15