Exhibit 4.4




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PageARTICLE I THE CERTIFICATES
    
    
    2Section 1.01. The Certificates
    
    
    2ARTICLE II DEFINITIONS
    
    
    4Section 2.01. Definitions
    
    
    4ARTICLE III DISTRIBUTIONS; STATEMENTS TO CERTIFICATEHOLDERS
    
    
    11Section 3.01. Statements to Applicable Certificateholders
    
    
    11Section 3.02. Special Payments Account
    
    
    12Section 3.03. Distributions from Special Payments Account
    
    
    13Section 3.04. Limitation of Liability for Payments
    
    
    14ARTICLE IV DEFAULT
    
    
    14Section 4.01. Purchase Rights of Certificateholders
    
    
    14Section 4.02. Amendment of Section 6.05 of the Basic Agreement
    
    
    16ARTICLE V THE TRUSTEE
    
    
    16Section 5.01. Acquisition of Trust Property
    
    
    16Section 5.02. [Intentionally Omitted]
    
    
    17Section 5.03. The Trustee
    
    
    17Section 5.04. Representations and Warranties of the Trustee
    
    
    18Section 5.05. Trustee Liens
    
    
    19ARTICLE VI ADDITIONAL AMENDMENT; SUPPLEMENTAL AGREEMENTS
    
    
    19Section 6.01. Amendment of Section 5.02 of the Basic Agreement
    
    
    19Section 6.02. Supplemental Agreements Without Consent of Applicable
Certificateholders
    
    
    19Section 6.03. Supplemental Agreements with Consent of Applicable
Certificateholders
    
    
    20Section 6.04. Consent of Holders of Certificates Issued under Other Trusts
    
    
    20ARTICLE VII TERMINATION OF TRUST
    
    
    20Section 7.01. Termination of the Applicable Trust
    
    
    20ARTICLE VIII MISCELLANEOUS PROVISIONS
    
    
    21Section 8.01. Basic Agreement Ratified
    
    
    21Section 8.02. GOVERNING LAW
    
    
    21Section 8.03. Execution in Counterparts
    
    
    21Section 8.04. Intention of Parties
    
    
    21




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Trust
Supplement Company Trustee Basic Agreement
 W I T N E S S E T H
  Owned
Aircraft New Aircraft Applicable Aircraft
    Applicable
Trust




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2    
 The Certificates




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3  ERISA Code




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4   
 Definitions
 Agreement
 Airbus société par actions simplifiée
 Aircraft
 Aircraft Purchase Agreement
 Applicable Aircraft
 Applicable Certificate Transfer Date Certificates
 Applicable Certificateholder
 Applicable Trust
 Assignment and Assumption Agreement




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5  Basic Agreement
 Business Day
 Certificate
 Certificate Buyout Event 60-Day Period
 Class
 Closing Notice
 Company
 Controlling Party
 Cut-off Date
 Delivery Period Termination Date
 Deposit Agreement




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6 Depositary
 Deposits
 Distribution Date
 Escrow Agent
 Escrow Agreement
 Escrow Paying Agent
 Escrow Receipt
 Final Maturity Date
 Final Withdrawal
 Final Withdrawal Date
 Guarantee
 Indenture
 Intercreditor Agreement




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7  Investors
 Liquidity Facility
 Liquidity Provider société anonyme
 New Aircraft
 Note Documents
 NPA
 Other Agreements
 Other Trustees
 Other Trusts




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8 Outstanding
    Owned Aircraft
 Participation Agreement
 Pool Balance
 Pool Factor




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9 Prospectus Supplement
 Ratings Confirmation
 Related Other Pass Through Trust Agreements
 Related Other Trustees
 Related Other Trusts
 Related Pass Through Trust Agreement
 Related Pass Through Trust Supplement
 Related Trust
 Related Trustee
 Scheduled Payment provided however
 Special Payment




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10 Transfer Date
 Transfer Date Certificates
 Triggering Event
 Trust Property provided
 Trust Supplement
 Trustee
 Underwriters
 Underwriting Agreement
 US Airways Bankruptcy Event




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11 
 Statements to Applicable Certificateholders




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12  th
    Special Payments Account




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13   Distributions from Special Payments Account




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14     Limitation of Liability for Payments
 
 Purchase Rights of Certificateholders provided




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15 provided
  provided however




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16    Amendment of Section 6.05 of the Basic Agreement
 
 Acquisition of Trust Property




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17    The Trustee




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18  Representations and Warranties of the Trustee




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19 provided however
 Trustee Liens
 
 Amendment of Section 5.02 of the Basic Agreement
 Supplemental Agreements Without Consent of Applicable
Certificateholders




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20 Supplemental Agreements with Consent of Applicable Certificateholders
 Consent of Holders of Certificates Issued under Other Trusts
 
 Termination of the Applicable Trust provided however
 th th




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21   
 Basic Agreement Ratified
 Section 8.02. GOVERNING LAW THE AGREEMENT AND THE APPLICABLE CERTIFICATES SHALL BE GOVERNED BY AND CONSTRUED IN ACCORDANCE
WITH THE LAWS OF THE STATE OF NEW YORK. THIS SECTION 8.02 SUPERSEDES AND REPLACES SECTION 12.05 OF
THE BASIC AGREEMENT, WITH RESPECT TO THE APPLICABLE TRUST.
 Execution in Counterparts
 Intention of Parties




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22  US AIRWAYS, INC.By:
Name:
    
    /s/ Thomas T. Weir
 Thomas
T. WeirTitle:
    
    Vice President and TreasurerWILMINGTON TRUST COMPANY, as TrusteeBy:
Name:
    
    /s/ Robert P. Hines, Jr.
 Robert
P. Hines, Jr.Title:
    
    Assistant Vice President