The Fuerza Aerea Argentina recently acquired a 737-700 to fulfill the role of military transport and possibly perform services on behalf of the state-run airline Lineas Aereas del Estado (LADE) serving the Patagonia energy / wilderness region, replacing to a degree the FAA's F-28 fleet which has been almost entirely retired.
The aircraft, 737-76N (c/n 33420/1459) flew from Mexico City, where it had undergone maintenance and preparations for service with the FAA, to Lima (LIM) and finally the FAA airbase at El Palomar (EPA), arriving on 27Apr21.
The new addition joined the Fuerza Aerea Argentina 1st Aerial Brigade, 1st Transport Group, where it was assigned the FAA registration, T-99.
T-99 was originally delivered to Ethiopian Airlines in 2004 and went on to fly with SAS Scandinavian Airlines before being stored in November 2020 and sold to the FAA.
T-99 has already operated some flights, including from Buenos Aires Aeroparque (AEP) recently.
The links below show some photos and video of the aircraft upon arriving at El Palomar (EPA):