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PROPERTY, PLANT AND EQUIPMENT (Details) - USD ($) $ in Thousands | Dec. 31, 2018 | Dec. 31, 2017 | Dec. 31, 2016 | Dec. 31, 2015
--- | --- | --- | --- | ---
Disclosure of detailed information about property, plant and equipment [line items] |  |  |  |  |  |
Book Value |  | $ 9,953,365 |  | $ 10,065,335 | $ 10,498,149 | $ 10,938,657
Construction in Progress [Member] |  |  |  |  |  |
Disclosure of detailed information about property, plant and equipment [line items] |  |  |  |  |  |
Book Value |  | 630,320 | [1] | 556,822 | 470,065 | 1,142,812
Land [Member] |  |  |  |  |  |
Disclosure of detailed information about property, plant and equipment [line items] |  |  |  |  |  |
Book Value |  | 45,424 |  | 49,780 | 50,148 | 45,313
Buildings [Member] |  |  |  |  |  |
Disclosure of detailed information about property, plant and equipment [line items] |  |  |  |  |  |
Book Value |  | 112,565 |  | 124,548 | 130,219 | 91,491
Plant and Equipment [Member] |  |  |  |  |  |
Disclosure of detailed information about property, plant and equipment [line items] |  |  |  |  |  |
Book Value |  | 5,644,451 |  | 6,832,398 |  |
Own Aircraft [Member] |  |  |  |  |  |
Disclosure of detailed information about property, plant and equipment [line items] |  |  |  |  |  |
Book Value | [2] | 5,239,298 |  | 6,405,573 |  |
Other [Member] |  |  |  |  |  |
Disclosure of detailed information about property, plant and equipment [line items] |  |  |  |  |  |
Book Value | [3] | 405,153 |  | 426,825 |  |
Machinery [Member] |  |  |  |  |  |
Disclosure of detailed information about property, plant and equipment [line items] |  |  |  |  |  |
Book Value |  | 6,594 |  | 9,788 |  |
Information Technology Equipment [Member] |  |  |  |  |  |
Disclosure of detailed information about property, plant and equipment [line items] |  |  |  |  |  |
Book Value |  | 22,564 |  | 30,156 | 39,714 | 43,889
Fixed Installations and Accessories [Member] |  |  |  |  |  |
Disclosure of detailed information about property, plant and equipment [line items] |  |  |  |  |  |
Book Value |  | 71,009 |  | 80,777 | 83,912 | 88,958
Motor Vehicles [Member] |  |  |  |  |  |
Disclosure of detailed information about property, plant and equipment [line items] |  |  |  |  |  |
Book Value |  | 9,122 |  | 11,478 |  |
Leasehold Improvements [Member] |  |  |  |  |  |
Disclosure of detailed information about property, plant and equipment [line items] |  |  |  |  |  |
Book Value |  | 83,267 |  | 84,225 | 104,541 | 54,088
Other Property, Plants and Equipment [Member] |  |  |  |  |  |
Disclosure of detailed information about property, plant and equipment [line items] |  |  |  |  |  |
Book Value |  | 3,328,049 |  | 2,285,363 | $ 1,828,630 | $ 2,129,506
Financial Leasing Aircraft [Member] |  |  |  |  |  |
Disclosure of detailed information about property, plant and equipment [line items] |  |  |  |  |  |
Book Value | [2] | 3,258,950 |  | 2,222,620 |  |
Other [Member] |  |  |  |  |  |
Disclosure of detailed information about property, plant and equipment [line items] |  |  |  |  |  |
Book Value |  | 69,099 |  | 62,743 |  |
Gross Book Value [Member] |  |  |  |  |  |
Disclosure of detailed information about property, plant and equipment [line items] |  |  |  |  |  |
Book Value |  | 14,848,281 |  | 14,310,287 |  |
Gross Book Value [Member] | Construction in Progress [Member] |  |  |  |  |  |
Disclosure of detailed information about property, plant and equipment [line items] |  |  |  |  |  |
Book Value | [1] | 630,320 |  | 556,822 |  |
Gross Book Value [Member] | Land [Member] |  |  |  |  |  |
Disclosure of detailed information about property, plant and equipment [line items] |  |  |  |  |  |
Book Value |  | 45,424 |  | 49,780 |  |
Gross Book Value [Member] | Buildings [Member] |  |  |  |  |  |
Disclosure of detailed information about property, plant and equipment [line items] |  |  |  |  |  |
Book Value |  | 179,907 |  | 190,552 |  |
Gross Book Value [Member] | Plant and Equipment [Member] |  |  |  |  |  |
Disclosure of detailed information about property, plant and equipment [line items] |  |  |  |  |  |
Book Value |  | 8,371,990 |  | 9,222,540 |  |
Gross Book Value [Member] | Own Aircraft [Member] |  |  |  |  |  |
Disclosure of detailed information about property, plant and equipment [line items] |  |  |  |  |  |
Book Value | [2] | 7,732,238 |  | 8,544,185 |  |
Gross Book Value [Member] | Other [Member] |  |  |  |  |  |
Disclosure of detailed information about property, plant and equipment [line items] |  |  |  |  |  |
Book Value | [3] | 639,752 |  | 678,355 |  |
Gross Book Value [Member] | Machinery [Member] |  |  |  |  |  |
Disclosure of detailed information about property, plant and equipment [line items] |  |  |  |  |  |
Book Value |  | 34,253 |  | 39,084 |  |
Gross Book Value [Member] | Information Technology Equipment [Member] |  |  |  |  |  |
Disclosure of detailed information about property, plant and equipment [line items] |  |  |  |  |  |
Book Value |  | 160,936 |  | 166,713 |  |
Gross Book Value [Member] | Fixed Installations and Accessories [Member] |  |  |  |  |  |
Disclosure of detailed information about property, plant and equipment [line items] |  |  |  |  |  |
Book Value |  | 182,629 |  | 186,989 |  |
Gross Book Value [Member] | Motor Vehicles [Member] |  |  |  |  |  |
Disclosure of detailed information about property, plant and equipment [line items] |  |  |  |  |  |
Book Value |  | 69,653 |  | 70,290 |  |
Gross Book Value [Member] | Leasehold Improvements [Member] |  |  |  |  |  |
Disclosure of detailed information about property, plant and equipment [line items] |  |  |  |  |  |
Book Value |  | 211,322 |  | 186,679 |  |
Gross Book Value [Member] | Other Property, Plants and Equipment [Member] |  |  |  |  |  |
Disclosure of detailed information about property, plant and equipment [line items] |  |  |  |  |  |
Book Value |  | 4,961,847 |  | 3,640,838 |  |
Gross Book Value [Member] | Financial Leasing Aircraft [Member] |  |  |  |  |  |
Disclosure of detailed information about property, plant and equipment [line items] |  |  |  |  |  |
Book Value | [2] | 4,862,985 |  | 3,551,041 |  |
Gross Book Value [Member] | Other [Member] |  |  |  |  |  |
Disclosure of detailed information about property, plant and equipment [line items] |  |  |  |  |  |
Book Value |  | 98,862 |  | 89,797 |  |
Accumulated Depreciation [Member] |  |  |  |  |  |
Disclosure of detailed information about property, plant and equipment [line items] |  |  |  |  |  |
Book Value |  | (4,894,916) |  | (4,244,952) |  |
Accumulated Depreciation [Member] | Construction in Progress [Member] |  |  |  |  |  |
Disclosure of detailed information about property, plant and equipment [line items] |  |  |  |  |  |
Book Value | [1] |  |  |  |  |
Accumulated Depreciation [Member] | Land [Member] |  |  |  |  |  |
Disclosure of detailed information about property, plant and equipment [line items] |  |  |  |  |  |
Book Value |  |  |  |  |  |
Accumulated Depreciation [Member] | Buildings [Member] |  |  |  |  |  |
Disclosure of detailed information about property, plant and equipment [line items] |  |  |  |  |  |
Book Value |  | (67,342) |  | (66,004) |  |
Accumulated Depreciation [Member] | Plant and Equipment [Member] |  |  |  |  |  |
Disclosure of detailed information about property, plant and equipment [line items] |  |  |  |  |  |
Book Value |  | (2,727,539) |  | (2,390,142) |  |
Accumulated Depreciation [Member] | Own Aircraft [Member] |  |  |  |  |  |
Disclosure of detailed information about property, plant and equipment [line items] |  |  |  |  |  |
Book Value | [2] | (2,492,940) |  | (2,138,612) |  |
Accumulated Depreciation [Member] | Other [Member] |  |  |  |  |  |
Disclosure of detailed information about property, plant and equipment [line items] |  |  |  |  |  |
Book Value | [3] | (234,599) |  | (251,530) |  |
Accumulated Depreciation [Member] | Machinery [Member] |  |  |  |  |  |
Disclosure of detailed information about property, plant and equipment [line items] |  |  |  |  |  |
Book Value |  | (27,659) |  | (29,296) |  |
Accumulated Depreciation [Member] | Information Technology Equipment [Member] |  |  |  |  |  |
Disclosure of detailed information about property, plant and equipment [line items] |  |  |  |  |  |
Book Value |  | (138,372) |  | (136,557) |  |
Accumulated Depreciation [Member] | Fixed Installations and Accessories [Member] |  |  |  |  |  |
Disclosure of detailed information about property, plant and equipment [line items] |  |  |  |  |  |
Book Value |  | (111,620) |  | (106,212) |  |
Accumulated Depreciation [Member] | Motor Vehicles [Member] |  |  |  |  |  |
Disclosure of detailed information about property, plant and equipment [line items] |  |  |  |  |  |
Book Value |  | (60,531) |  | (58,812) |  |
Accumulated Depreciation [Member] | Leasehold Improvements [Member] |  |  |  |  |  |
Disclosure of detailed information about property, plant and equipment [line items] |  |  |  |  |  |
Book Value |  | (128,055) |  | (102,454) |  |
Accumulated Depreciation [Member] | Other Property, Plants and Equipment [Member] |  |  |  |  |  |
Disclosure of detailed information about property, plant and equipment [line items] |  |  |  |  |  |
Book Value |  | (1,633,798) |  | (1,355,475) |  |
Accumulated Depreciation [Member] | Financial Leasing Aircraft [Member] |  |  |  |  |  |
Disclosure of detailed information about property, plant and equipment [line items] |  |  |  |  |  |
Book Value | [2] | (1,604,035) |  | (1,328,421) |  |
Accumulated Depreciation [Member] | Other [Member] |  |  |  |  |  |
Disclosure of detailed information about property, plant and equipment [line items] |  |  |  |  |  |
Book Value |  | $ (29,763) |  | $ (27,054) |  |
[1] | As of December 31, 2018, includes advances paid to aircraft manufacturers for ThUS$ 612,236 (ThUS$ 543,720 as of December 31, 2017)
[2] | In the period ended December 31, 2018, the Company sold its participation in twenty special-purpose entities. As a result of this, 50 aircraft were reclassified from the category Plants and equipment to the category Other properties, plants and equipment.
[3] | Consider mainly rotables and tools.

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