EX-10.16(k)





 [***] Certain information in this document has been excluded pursuant to Regulation S-K, Item 601(b)(10). 
 Such excluded information is not material and would likely cause competitive harm to the
registrant if publicly disclosed. 
 Exhibit 10.16(k) 

LETTER AGREEMENT N° 6D-2 

October 9, 2019 
 FRONTIER AIRLINES, INC.

 4545 Airport Way 
 Denver, Colorado 

80239 
 USA 

Subject: A321XLR PERFORMANCE GUARANTEES (CFM International LEAP-1A33B2 ENGINES) 

FRONTIER AIRLINES, INC. (the “Buyer”) and AIRBUS S.A.S. (the “Seller”) have entered into that A320
Family Purchase Agreement dated as of September 30, 2011 (as amended, supplemented and modified from time to time as of the date hereof, the “Agreement”) which covers, among other matters the manufacture and the sale by
the Seller and the purchase by the Buyer of the A321XLR Aircraft as described in the Agreement (the “Applicable Aircraft”). 
 The terms
“herein”, “hereof” and “hereunder” and words of similar import refer to this Letter Agreement. Capitalized terms used herein and not otherwise defined in this Letter Agreement
shall have the meanings assigned thereto in the Agreement. 
 Both parties agree that this Letter Agreement, upon execution thereof, shall constitute an
integral, nonseverable part of the Agreement and shall be governed by all its provisions, as such provisions have been specifically amended pursuant to this Letter Agreement. 

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 LETTER AGREEMENT N° 6D-2 

 

	1	 AIRCRAFT CONFIGURATION 



The guarantees provided in this Letter Agreement (individually a “Performance Guarantee” or collectively the
“Performance Guarantees”) are applicable to the Applicable Aircraft as described in the Standard Specification reference [***] as amended by [***] and by Specification Change Notices (SCNs) for: 

- [***] 
 - [***] 

hereinafter referred to as the “Performance Specification”, and without taking into account any further changes thereto
as provided in the Agreement. 
 The Performance Guarantees are subject to certification and signature by the Buyer of the SCN for the [***]
and for [***] as defined above. 
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 LETTER AGREEMENT N° 6D-2 

 

	2	 GUARANTEED PERFORMANCE 



 

	2.1	 [***] guarantee 



 

	 	[***]	 


  

	2.2	 [***] guarantee [***] 



 

	 	[***]	 


  

	2.3	 [***] guarantee 



 

	 	[***]	 



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 LETTER AGREEMENT N° 6D-2 

 

	3	 [***] GUARANTEES 



 

	3.1	 [***] 


  

	3.1.1	 [***] 


  

	3.1.2	 [***] 


  

	3.1.3	 [***] 


  

	3.1.4	 [***] 


  

	3.1.5	 [***] 


  

	3.1.6	 [***] 



  
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 LETTER AGREEMENT N° 6D-2 

 

	3.1.7	 [***] 


  

	3.1.8	 [***] 


  

	 	a)	 [***] 


  

	 	b)	 [***] 


  

	 	c)	 [***] 


  

	 	d)	 [***] 


  

	 	e)	 [***] 



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 LETTER AGREEMENT N° 6D-2 

 

	3.2	 [***] 


  

	 	[***]	 


  

	3.2.1	 [***] 


  

	3.2.2	 [***] 


  

	3.2.3	 [***] 


  

	3.2.4	 [***] 


  

	3.2.5	 [***] 


  

	3.2.6	 [***] 


  

	3.2.7	 [***] 


  

	3.2.8	 [***] 


  

	 	a)	 [***] 


  

	 	b)	 [***] 


  

	 	c)	 [***] 


  

	 	d)	 [***] 


  

	 	e)	 [***] 



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 LETTER AGREEMENT N° 6D-2 

 

	3.3	 [***] 


  

	3.3.1	 [***] 


  

	3.3.2	 [***] 


  

	3.3.3	 [***] 


  

	3.3.4	 [***] 


  

	3.3.5	 [***] 


  

	3.3.6	 [***] 


  

	3.3.7	 [***] 



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 LETTER AGREEMENT N° 6D-2 

 

	3.3.8	 [***] 


  

	 	a)	 [***] 


  

	 	b)	 [***] 


  

	 	c)	 [***] 


  

	 	d)	 [***] 


  

	 	e)	 [***] 



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 LETTER AGREEMENT N° 6D-2 

 

	3.4	 [***] 


  

	 	[***]	 


  

	3.4.1	 [***] 


  

	3.4.2	 [***] 


  

	3.4.3	 [***] 


  

	3.4.4	 [***] 


  

	3.4.5	 [***] 


  

	3.4.6	 [***] 


  

	3.4.7	 [***] 


  

	3.4.8	 [***] 


  

	 	a)	 [***] 


  

	 	b)	 [***] 


  

	 	c)	 [***] 


  

	 	d)	 [***] 


  

	 	e)	 [***] 



  
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 LETTER AGREEMENT N° 6D-2 

 

	3.5	 [***] Guarantee – [***] 



 

	 	[***]	 


  

	3.5.1	 [***] 


  

	3.5.2	 [***] 


  

	3.5.3	 [***] 


  

	3.5.4	 [***] 


  

	3.5.5	 [***] 


  

	3.5.6	 [***] 


  

	3.5.7	 [***] 


  

	3.5.8	 [***] 


  

	 	a)	 [***] 


  

	 	b)	 [***] 


  

	 	c)	 [***] 


  

	 	d)	 [***] 


  

	 	e)	 [***] 


  

	3.6	 [***] 


  

	 	[***]	 



  
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 LETTER AGREEMENT N° 6D-2 

 

	4	 [***] GUARANTEE 



 

	 	[***]	 


  

	5	 PERFORMANCE GUARANTEES CONDITIONS 



 

	5.1	 [***] 


  

	5.2	 [***] 


  

	5.3	 [***] 


  

	5.4	 [***] 


  

	5.5	 [***] 



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 LETTER AGREEMENT N° 6D-2 

 

	6	 PERFORMANCE GUARANTEES COMPLIANCE 



 

	6.1	 [***] 


  

	6.2	 [***] 


  

	6.3	 [***] 


  

	6.3.1	 [***] 


  

	6.3.2	 [***] 


  

	6.4	 [***[ 


  

	6.5	 [***] 



  
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 LETTER AGREEMENT N° 6D-2 

 

	6.6	 [***] 


  

	6.7	 [***] 


  

	7	 ADJUSTMENT OF PERFORMANCE GUARANTEES 



 

	7.1	 [***] 


  

	7.2	 [***] 


  

	8	 EXCLUSIVE PERFORMANCE GUARANTEES 



 

	 	[***]	 



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 LETTER AGREEMENT N° 6D-2 

 

	9	 [***] 


  

	9.1	 [***] 


  

	9.2	 [***] 


  

	9.2.1	 [***] 


  

	9.2.2	 [***] 


  

	9.2.3	 [***] 


  

	9.3	 [***] 


  

	9.4	 [***] 



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 LETTER AGREEMENT N° 6D-2 

 

	10	 INCONSISTENCIES 



In the event of any inconsistency between the terms of this Letter Agreement and the terms of the Agreement, the terms of this Letter Agreement
shall prevail over the terms of the Agreement. 
  

	11	 ASSIGNMENT 



Notwithstanding any other provision of this Letter Agreement or of the Agreement but subject to Clause 21.2 of the Agreement, this Letter
Agreement and the rights and obligations of the Buyer herein shall not be assigned or transferred in any manner, and any attempted assignment or transfer in contravention of the provisions of this Clause shall be void and of no force or effect. 

 

	12	 CONFIDENTIALITY 



This Letter Agreement is subject to the terms and conditions of Clause 22.11 of the Agreement. 

 

	13	 LAW AND JURISDICTION 



This Letter Agreement shall be governed by, and construed in accordance with, the laws of the State of New York and the provisions of Clause
22.6 of the Agreement shall apply to this Letter Agreement. 
  

	14	 COUNTERPARTS 



This Letter Agreement may be executed by the parties hereto in separate counterparts, each of which when so executed and delivered will be an
original, but all such counterparts will together constitute one and the same instrument. 
  

	15	 EFFECTIVE DATE 



This Letter Agreement is effective as of the date first written above. 

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 LETTER AGREEMENT N° 6D-2 

If the foregoing correctly sets forth our understanding, please execute two (2) originals in the space provided below and return one (1) original of
this Letter Agreement to the Seller. 
  

			
	Agreed and Accepted	  	Agreed and Accepted
		
	For and on behalf of	  	For and on behalf of
		
	FRONTIER AIRLINES, INC.	  	AIRBUS S.A.S

  

									
					
	By:  :  	 	/s/ Howard Diamond	 		 	By:  :  	 	/s/ Benoît de Saint-Exupéry


									
	Its:  :  	 	SVP, General Counsel & Secretary	 		 	Its:  :  	 	Senior Vice President, Contracts


  
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 LETTER AGREEMENT N° 6D-2 

APPENDIX A 
 [***] 

  
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