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OTHER NON-FINANCIAL ASSETS | 12 Months Ended
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Dec. 31, 2017
Miscellaneous assets [abstract] |
OTHER NON-FINANCIAL ASSETS | NOTE 12 - 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. These amounts are calculated based on performance measures, such as flight hours or cycles, are paid periodically (usually monthly) and are contractually required to be repaid to the lessee upon the completion of the required maintenance of the leased aircraft. At the end of the lease term, any unused maintenance reserves are either returned to the Company in cash or used to offset amounts that we may owe the lessor as a maintenance adjustment. In some cases (five lease agreements), if the maintenance cost incurred by LATAM is less than the corresponding maintenance reserves, the lessor is entitled to retain those excess amounts at the time the heavy maintenance is performed. The Company periodically reviews its maintenance reserves for each of its leased aircraft to ensure that they will be recovered, and recognizes an expense if any such amounts are less than probable of being returned. The cost of aircraft maintenance in the last years has been higher than the related maintenance reserves for all aircraft. As of December 31, 2017, maintenance reserves total ThUS $ 73,341 (ThUS $ 141,751 as of December 31, 2016), corresponding to 14 aircraft that maintain remaining balances, which will be settled in the next maintenance or return. Aircraft maintenance reserves are classified as current or non-current depending on the dates when the related maintenance is expected to be performed (Note 2.23)

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