| **EXHIBIT                10.40 (f)**                                                                                                                                                                                                                                                                                            |
|---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| **CONFIDENTIAL                TREATMENT**                                                                                                                                                                                                                                                                                       |
| ** REQUESTED                PURSUANT TO RULE 24b-2**                                                                                                                                                                                                                                                                       |
| ** **                                                                                                                                                                                                                                                                                                                      |
| **Certain              portions of this exhibit have been omitted pursuant to a request for              confidential treatment under Rule 24b-2 of the Securities Exchange              Act of              1934. The omitted materials have been filed separately with the Securities              and Exchange Commission.** |
|                                                                                                                                                                                                                                                                                                                            |
| ** CONFIDENTIAL**                                                                                                                                                                                                                                                                                                          |

**AMENDMENT      No. 6 TO LETTER AGREEMENT DCT-015/2004**

| **1.  ** | **Spare                Parts Credit:** |
|--------------------|----------------------------------------|

| 1.1   | Article                1(ii) of the Letter Agreement shall be deleted and replaced by the                following : |
|-----------------|----------------------------------------------------------------------------------------------------------------------|

**2.      Aircraft **

**3.      **

**4.      Schedule 5**

**5.      **
**      Aircraft**

**6.      **

**7.      Miscellaneous**

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**CONFIDENTIAL**

| EMBRAER              - Empresa Brasileira de Aeronáutica S.A.                                             |   |   | REPUBLIC              AIRLINE INC.                            |
|----------------------------------------------------------------------------------------------------------------|--------|--------|---------------------------------------------------------------|
|                                                                                                           |   |   |                                                          |
| /s/ Horacio              Aragones Forjaz                                                                  |   |   | /s/ Bryan              Bedford                           |
|                                                                                                                |   |   |                                                               |
| Name:              Horacio Aragones ForjazTitle: Executive Vice President              Corporate Communication |   |   | Name:              Bryan BedfordTitle:              President |

|                                                                                                         |   |   |                                      |
|--------------------------------------------------------------------------------------------------------------|--------|--------|-------------------------------------------|
| /s/ Jose              Luis              D. Molina                                                       |   |   |                                      |
|                                                                                                              |   |   |                                           |
| Name:Jose              Luis              D. MolinaTitle: Director of Contracts - Airline              Market |   |   |                                           |
| Date:              October 18, 2005                                                                          |   |   | Date:              October 18, 2005       |
| Place:              San Jose Dos Campos, S.P.                                                                |   |   | Place:              Indianapolis, IN      |
|                                                                                                         |   |   |                                      |
| Witness:              /s/ Fernando Bueno                                                                     |   |   | Witness              /s/ Lars-Erik Arnell |
| Name:              Fernando Bueno                                                                            |   |   |  Name:              Lars-Erik Arnell |

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