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INVENTORIES (Tables)
 12 Months Ended
Dec. 31, 2021
INVENTORIES [Abstract]  
Schedule of composition of inventories
   As of   As of 
   December 31,   December 31, 
   2021   2020 
   ThUS$   ThUS$ 
Technical stock   250,327    284,409 
Non-technical stock   37,010    39,165 
Total   287,337    323,574 

 
Schedule of inventory average cost, net of provision for obsolescence
   As of   As of 
   December 31,   December 31, 
   2021   2020 
   ThUS$   ThUS$ 
Provision for obsolescence Technical stock   64,455    42,979 
Provision for obsolescence Non-technical stock   5,785    4,651 
Total   70,240    47,630