	Gross value				Accumulated depreciation						Net carrying value
	At December 31, 2017		At December 31, 2016		At December 31, 2017			At December 31, 2016			At December 31, 2017		At December 31, 2016
Leasehold improvements to flight equipment	Ps.	2,382,687	Ps.	1,709,868	Ps.	(1,769,589	)	Ps.	(1,386,844	)	Ps.	613,098	Ps.	323,024
Pre-delivery payments	2,783,303		1,206,330		—			—			2,783,303		1,206,330
Aircraft parts and rotable spare parts	506,735		393,522		(181,091		)	(137,712		)	325,644		255,810
Aircraft spare engines	323,410		323,025		(18,132		)	(1,337		)	305,278		321,688
Construction and improvements in process	193,607		255,374		—			—			193,607		255,374
Standardization	192,808		176,975		(113,407		)	(94,864		)	79,401		82,111
Constructions and improvements	131,503		120,886		(106,335		)	(85,873		)	25,168		35,013
Computer equipment	30,113		24,172		(20,790		)	(16,972		)	9,323		7,200
Workshop tools	20,500		20,500		(18,229		)	(15,915		)	2,271		4,585
Electric power equipment	15,439		14,818		(9,185		)	(7,890		)	6,254		6,928
Communications equipment	11,229		9,261		(6,502		)	(5,706		)	4,727		3,555
Workshop machinery and equipment	8,405		7,240		(4,345		)	(3,622		)	4,060		3,618
Motorized transport equipment platform	5,587		5,703		(4,701		)	(4,346		)	886		1,357
Service carts on board	5,403		5,403		(5,021		)	(4,645		)	382		758
Office furniture and equipment	44,749		36,310		(22,454		)	(18,653		)	22,295		17,657

Total	Ps.	6,655,478	Ps.	4,309,387	Ps.	(2,279,781	)	Ps.	(1,784,379	)	Ps.	4,375,697	Ps.	2,525,008

*During the years ended December 31, 2017 and 2016, the Company capitalized borrowing costs of Ps.193,389 and Ps.95,445, respectively. The amount of this line is net of disposals of capitalized borrowing costs related to sale and leaseback transactions of Ps.110,274 and Ps.84,936, respectively.

	Aircraft parts and rotable spare parts			Aircraft spare Engines			Constructions and improvements			Standardization			Computer equipment			Office furniture and equipment			Electric power equipment			Workshop Tools			Motorized transport equipment platform			Communications equipment			Workshop machinery and equipment			Service carts on board			Pre-delivery payments			Construction and improvements in process			Leasehold improvements to flight equipment			Total
Net book amount as of December 31, 2015	Ps.	179,947		Ps.	—		Ps.	18,202		Ps.	83,886		Ps.	4,195		Ps.	12,932		Ps.	9,033		Ps.	4,815		Ps.	1,326		Ps.	3,764		Ps.	4,179		Ps.	1,453		Ps.	1,583,835		Ps.	140,926		Ps.	501,157		Ps.	2,549,650

Additions	110,592			323,025			2,218			21,953			740			517			1,467			4,217			505			129			131			36			1,345,081			161,560			226,526			2,198,697
Disposals and transfers	(1,299		)	—			—			—			—			(110		)	(1,626		)	—			(49		)	—			—			—			(1,733,093		)	(2,132		)	—			(1,738,309		)
Borrowing costs, net*	—			—			—			—			—			—			—			—			—			—			—			—			10,507			—			—			10,507
Other movements	—			—			32,441			—			4,814			7,877			—			25			46			493			—			—			—			(44,980		)	—			716
Depreciation	(33,430		)	(1,337		)	(17,848		)	(23,728		)	(2,549		)	(3,559		)	(1,946		)	(4,472		)	(471		)	(831		)	(692		)	(731		)	—			—			(404,659		)	(496,253		)

As of December 31, 2016	255,810			321,688			35,013			82,111			7,200			17,657			6,928			4,585			1,357			3,555			3,618			758			1,206,330			255,374			323,024			2,525,008

Cost	393,522			323,025			120,886			176,975			24,172			36,310			14,818			20,500			5,703			9,261			7,240			5,403			1,206,330			255,374			1,709,868			4,309,387
Accumulated depreciation	(137,712		)	(1,337		)	(85,873		)	(94,864		)	(16,972		)	(18,653		)	(7,890		)	(15,915		)	(4,346		)	(5,706		)	(3,622		)	(4,645		)	—			—			(1,386,844		)	(1,784,379		)

Net book amount as of December 31, 2016	Ps.	255,810		Ps.	321,688		Ps.	35,013		Ps.	82,111		Ps.	7,200		Ps.	17,657		Ps.	6,928		Ps.	4,585		Ps.	1,357		Ps.	3,555		Ps.	3,618		Ps.	758		Ps.	1,206,330		Ps.	255,374		Ps.	323,024		Ps.	2,525,008
Additions	115,173			385			—			15,833			1,845			6,805			—			—			—			—			123			—			1,707,805			206,932			529,331			2,584,232
Disposals and transfers	(930		)	—			—			—			—			(15		)	—			—			—			—			—			—			(213,947		)	(3,555		)	(101,224		)	(319,671		)
Borrowing costs, net*	—			—			—			—			—			—			—			—			—			—			—			—			83,115			—			—			83,115
Other movements	—						10,371			—			4,087			1,649			620			—			—			1,968			1,041			—			—			(265,144		)	244,712			(696		)
Depreciation	(44,409		)	(16,795		)	(20,216		)	(18,543		)	(3,809		)	(3,801		)	(1,294		)	(2,314		)	(471		)	(796		)	(722		)	(376		)	—			—			(382,745		)	(496,291		)

As of December 31, 2017	325,644			305,278			25,168			79,401			9,323			22,295			6,254			2,271			886			4,727			4,060			382			2,783,303			193,607			613,098			4,375,697

Cost	506,735			323,410			131,503			192,808			30,113			44,749			15,439			20,500			5,587			11,229			8,405			5,403			2,783,303			193,607			2,382,687			6,655,478
Accumulated depreciation	(181,091		)	(18,132		)	(106,335		)	(113,407		)	(20,790		)	(22,454		)	(9,185		)	(18,229		)	(4,701		)	(6,502		)	(4,345		)	(5,021		)	—			—			(1,769,589		)	(2,279,781		)

Net book amount as of December 31, 2017	Ps.	325,644		Ps.	305,278		Ps.	25,168		Ps.	79,401		Ps.	9,323		Ps.	22,295		Ps.	6,254		Ps.	2,271		Ps.	886		Ps.	4,727		Ps.	4,060		Ps.	382		Ps.	2,783,303		Ps.	193,607		Ps.	613,098		Ps.	4,375,697