Blog reader Maximo Gainza has been kind enough to write with several corrections to yesterday's posting regarding Lineas Aereas del Sur:
1) The airline was founded sometime in 2010, not 2005, with the first charter taking place in August or September 2011. It operated very few charter flights during its existence; probably fewer than a dozen.
2) LV-ZXC never flew for Chilean carrier Aerolineas del Sur, having been one of the last 737-200's retired by Aerolineas Argentinas in 2009.
3) If the aircraft is due for a C-Check it is more likely due to calendar expiration rather than hours flown.
4) The Bolivian Air Force might be interested in acquiring it for TAM - Transporte Aereo Militar, which might explain why it is parked in Mendoza.
Maximo also comments that the only other Argentine 737-200 operator, ARJet, which operates LV-ZYY, is flying occasional charters but also has a doubtful future.