Exhibit 10.56

Michelle V. Bryan
Senior Vice President-Human Resources

Mr. David N. Siegel
3750 Georgetown Street
Houston, Texas 77005

Dear David:

This letter, when countersigned by you, will constitute an agreement between you and US Airways, Inc. ("US Airways") concerning supplemental retirement benefits to be paid to you upon your retirement from US Airways. In consideration for your future services, US Airways hereby agrees to pay you a supplemental pension benefit in accordance with the following terms:

1.         A pension benefit equal to the difference of subparagraph (a) minus subparagraph (b), where (a) and (b) are:

(a)         the pension benefit calculated under the benefit formula set forth in the
                                    Retirement Plan for Certain Employees of USAir, Inc. (the "Retirement
                                    Plan") assuming (i) that the Retirement Plan had not been frozen in 1991, (ii)
                                    final average earnings as calculated under the Retirement Plan, (iii) no
                                    amendments to the Retirement Plan after the date hereof, (iv) for purposes
                                    of vesting you will be deemed to be 100% vested on the date of hire, and
                                    (v) credited service under the Retirement Plan using "deemed credited
                                    service" determined under the following schedule:

Actual Service                       Deemed Credited Service

1 full year of service                3 years of credited service
                                    2 full years of service              6 years of credited service
                                    3 full years of service              9 years of credited service
                                    4 full years of service              12 years of credited service
                                    5 full years of service              20 years of credited service

plus, one and one-half years of credited service for each actual year of
                                    service after five years, up to a maximum of 30 years of credited service;

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Mr. David N. Siegel
March 11, 2002
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                       (b)         all pension benefits payable to you in the aggregate under any defined
                                    contributionpension plan maintained by US Airways for the purpose of
                                    providing retirement income, whether tax-qualified or non-tax-qualified
                                    (the "Defined Contribution Pension Plans").

2.         For purposes of calculating the supplemental benefits under paragraph 1 above, the following rules will be applied:

(a)         In determining the amount of the pension benefit calculated under the benefit
                                    formula set forth in the Retirement Plan it shall be assumed that the limitations
                                    imposed by Sections 401(a)(17) and 415 of the Internal Revenue Code are
                                    not applicable.

(b)         In determining the amount of the pension benefit payable in the aggregate
                                    under the Defined Contribution Pension Plans, the benefit shall only be
                                    included to the extent that it is attributable to contributions made by US
                                    Airways (including earnings/losses on such contributions) and any portion of
                                    the benefit payable under such Defined Contribution Pension Plans
                                    attributable to your own contributions (including earnings/losses on such
                                    contributions) shall be excluded.

(c)         In determining the amount of the pension benefit payable under the Defined
                                    Contribution Pension Plans, any benefit payable in the form of a lump sum,
                                    shall be converted to an annuity for purposes of calculating the benefit to be
                                    offset by subparagraph 1(b).

(d)         In determining the amount of your supplemental benefit hereunder,
                                    the reduction factors, actuarial assumptions, definitions,
                                    administrative provisions and other applicable provisions of the Retirement
                                    Plan will control.

3.         The amount of the supplemental pension benefit calculated pursuant to paragraph 1 will be payable in an unreduced amount in the event of your normal retirement from US Airways at age 62, or you may elect to receive early retirement benefits under this agreement at any time after termination of your employment with US Airways and upon your attainment of age 55. In the event of your early retirement from US Airways, the supplemental pension benefit calculated pursuant to paragraph 1 will be reduced for early commencement in accordance with the early retirement reduction factors set forth in the Retirement Plan.

4.         You may elect to receive your supplemental pension benefits in any one of the following payment forms:

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Mr. David N. Siegel
March 11, 2002
Page 3
                       (a)         an annuity (either single life or joint and survivor) payable from the general
                                    assets of US Airways;

(b)         a single lump sum payment;

(c)         periodic installment payments; or

(d)         an annuity (either single life or joint and survivor) purchased by US Airways
                                    from an annuity provider and assigned to you.

In the event that you select an option other than option (a), the cost of providing such optional payment form must be cost-neutral to US Airways to providing payment option (a), as determined by US Airways in accordance with its general principles for administering optional pension payment forms under other defined benefit pension plans of the company.

5.         In the event of your death prior to the payment of your supplemental pension benefit, your surviving spouse will be entitled to a benefit hereunder equal to 50 percent of the benefit which would have been payable had you retired and commenced benefits on the day before your death (payable at the earliest date on which you could have commenced a benefit payment hereunder). In the event of your death prior to the payment of your supplemental pension benefit and you have no surviving spouse, US Airways will have no payment obligation under this agreement. In the event of your death after the commencement of benefits hereunder, a death benefit will be payable only if applicable pursuant to the payment form elected under paragraph 4.

6.         Notwithstanding anything in this agreement to the contrary, your supplemental pension benefit will immediately vest and you will be entitled to a benefit under paragraph 1 assuming 30 years of deemed credited service in the event of a "change-of-control." For purposes of this paragraph the term "change-of-control" shall have the meaning set forth in the employment agreement between you and US Airways dated March 11, 2002.

7.         Prior to the termination of your employment, your benefits hereunder shall be accrued, but unfunded and unsecured.

8.         This letter may be amended or supplemented at the request of either party hereto to clarify its application with respect to any future pension plan which US Airways may adopt replacing or supplementing its existing plans. Any such amendment or supplement will be prepared on the basis of the intent of the parties that US Airways is seeking to provide you with supplemental pension benefits as determined in paragraph 1 above.

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Mr. David N. Siegel
March 11, 2002
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            If you concur in the foregoing, please indicate your agreement by signing a copy of this letter in the space provided below.

US AIRWAYS, INC.

_/s/ Michelle V. Bryan______________Michelle V. BryanSenior Vice President-Human Resources

Agreed:

_/s/ David N. Siegel_________
David N. Siegel

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