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OTHER NON-FINANCIAL ASSETS (Tables) | 12 Months Ended
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Dec. 31, 2017
Miscellaneous assets [abstract] |
Schedule of composition of Other non-financial assets | The composition of other non-financial assets is as follows:
|  | Current assets |  |  | Non-current assets |  |  | Total Assets |
|  | As of |  |  | As of |  |  | As of |  |  | As of |  |  | As of |  |  | As of |
|  | December 31, |  |  | December 31, |  |  | December 31, |  |  | December 31, |  |  | December 31, |  |  | December 31, |
|  | 2017 |  |  | 2016 |  |  | 2017 |  |  | 2016 |  |  | 2017 |  |  | 2016 |
|  | ThUS$ |  |  | ThUS$ |  |  | ThUS$ |  |  | ThUS$ |  |  | ThUS$ |  |  | ThUS$ |
(a) Advance payments |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Aircraft leases |  |  | 31,322 |  |  |  | 37,560 |  |  |  | 4,718 |  |  |  | 14,065 |  |  |  | 36,040 |  |  |  | 51,625 |
Aircraft insurance and other |  |  | 17,681 |  |  |  | 14,717 |  |  |  | - |  |  |  | - |  |  |  | 17,681 |  |  |  | 14,717 |
Others |  |  | 10,012 |  |  |  | 4,521 |  |  |  | 1,186 |  |  |  | 1,573 |  |  |  | 11,198 |  |  |  | 6,094 |
Subtotal advance payments |  |  | 59,015 |  |  |  | 56,798 |  |  |  | 5,904 |  |  |  | 15,638 |  |  |  | 64,919 |  |  |  | 72,436 |
(b) Other assets |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Aircraft maintenance reserve (*) |  |  | 21,505 |  |  |  | 51,576 |  |  |  | 51,836 |  |  |  | 90,175 |  |  |  | 73,341 |  |  |  | 141,751 |
Sales tax |  |  | 137,866 |  |  |  | 102,351 |  |  |  | 37,959 |  |  |  | 40,232 |  |  |  | 175,825 |  |  |  | 142,583 |
Other taxes |  |  | 2,475 |  |  |  | 500 |  |  |  | - |  |  |  | - |  |  |  | 2,475 |  |  |  | 500 |
Contributions to Société Internationale de Télécommunications Aéronautiques ("SITA") |  |  | 327 |  |  |  | 406 |  |  |  | 670 |  |  |  | 591 |  |  |  | 997 |  |  |  | 997 |
Judicial deposits |  |  | - |  |  |  | - |  |  |  | 124,438 |  |  |  | 90,604 |  |  |  | 124,438 |  |  |  | 90,604 |
Others |  |  | - |  |  |  | 611 |  |  |  | - |  |  |  | 104 |  |  |  | - |  |  |  | 715 |
Subtotal other assets |  |  | 162,173 |  |  |  | 155,444 |  |  |  | 214,903 |  |  |  | 221,706 |  |  |  | 377,076 |  |  |  | 377,150 |
Total Other Non - Financial Assets |  |  | 221,188 |  |  |  | 212,242 |  |  |  | 220,807 |  |  |  | 237,344 |  |  |  | 441,995 |  |  |  | 449,586 |
(*) Aircraft maintenance reserves reflect prepayment deposits made by the group to lessors of certain aircraft under operating lease agreements in order to ensure that funds are available to support the scheduled heavy maintenance of the aircraft.

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