FORM 4 Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP OF SECURITIES Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934, Section 17(a) of the Public Utility Holding Company Act of 1935 or Section 30(h) of the Investment Company Act of 1940

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1. Name and Address of Reporting Person * MESDAG WILLEM   2. Issuer Name and Ticker or Trading Symbol Air Transport Services Group, Inc. [ATSG] 5. Relationship of Reporting Person(s) to Issuer (Check all applicable) _____ Director __X__ 10% Owner _____ Officer (give title below) _____ Other (specify below) (Last) (First) (Middle) 10100 SANTA MONICA BOULEVARD, SUITE 925 3. Date of Earliest Transaction (Month/Day/Year) 05/26/2009 (Street) LOS ANGELES, CA 90067 4. If Amendment, Date Original Filed(Month/Day/Year) 6. Individual or Joint/Group Filing(Check Applicable Line) ___ Form filed by One Reporting Person _X_ Form filed by More than One Reporting Person (City) (State) (Zip) Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned

1.Title of Security (Instr. 3) 2. Transaction Date (Month/Day/Year) 2A. Deemed Execution Date, if any (Month/Day/Year) 3. Transaction Code (Instr. 8) 4. Securities Acquired (A) or Disposed of (D) (Instr. 3, 4 and 5) 5. Amount of Securities Beneficially Owned Following Reported Transaction(s) (Instr. 3 and 4) 6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4) 7. Nature of Indirect Beneficial Ownership (Instr. 4) Code V Amount (A) or (D) Price Common Stock               3,176,148 I See footnote and Remarks below. (1) Common Stock 05/26/2009   P   300,000 A $ 1.1926 (3) 4,100,368 (6) I See footnote and Remarks below. (2) Common Stock 05/27/2009   P   283,873 A $ 1.3203 (4) 4,384,241 (6) I See footnote and Remarks below. (2) Common Stock 05/28/2009   P   221,041 A $ 1.4239 (5) 4,605,282 (6) I See footnote and Remarks below. (2)

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Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned
(e.g., puts, calls, warrants, options, convertible securities)

1. Title of Derivative Security (Instr. 3)

2. Conversion or Exercise Price of Derivative Security

3. Transaction Date (Month/Day/Year)

3A. Deemed Execution Date, if any (Month/Day/Year)

4. Transaction Code (Instr. 8)

5. Number of Derivative Securities Acquired (A) or Disposed of (D) (Instr. 3, 4, and 5)

6. Date Exercisable and Expiration Date (Month/Day/Year)

7. Title and Amount of Underlying Securities (Instr. 3 and 4)

8. Price of Derivative Security (Instr. 5)

9. Number of Derivative Securities Beneficially Owned Following Reported Transaction(s) (Instr. 4)

10. Ownership Form of Derivative Security: Direct (D) or Indirect (I) (Instr. 4)

11. Nature of Indirect Beneficial Ownership (Instr. 4)

Code

V

(A)

(D)

Date Exercisable

Expiration Date

Title

Amount or Number of Shares

Reporting Owners

Reporting Owner Name / Address	Relationships
	Director	10% Owner	Officer	Other
MESDAG WILLEM 10100 SANTA MONICA BOULEVARD SUITE 925 LOS ANGELES, CA 90067		X
RED MOUNTAIN CAPITAL PARTNERS LLC 10100 SANTA MONICA BOULEVARD SUITE 925 LOS ANGELES, CA 90067		X
RED MOUNTAIN CAPITAL MANAGEMENT INC 10100 SANTA MONICA BOULEVARD SUITE 925 LOS ANGELES, CA 90067		X
RED MOUNTAIN CAPITAL PARTNERS II, L.P. 10100 SANTA MONICA BOULEVARD SUITE 925 LOS ANGELES, CA 90067		X
RED MOUNTAIN CAPITAL PARTNERS III, L.P. 10100 SANTA MONICA BOULEVARD SUITE 925 LOS ANGELES, CA 90067		X
RMCP GP LLC 10100 SANTA MONICA BOULEVARD SUITE 925 LOS ANGELES, CA 90067		X

Signatures

/s/ Willem Mesdag (on behalf of himself and the Red Mountain Entities)		05/28/2009
**Signature of Reporting Person		Date

Explanation of Responses:

*	If the form is filed by more than one reporting person, see Instruction 4(b)(v).
**	Intentional misstatements or omissions of facts constitute Federal Criminal Violations. See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
(1)	These shares are held directly by Red Mountain Capital Partners III, L.P. ("RMCP III").
(2)	These shares are held directly by Red Mountain Capital Partners II, L.P. ("RMCP II").
(3)	Weighted average price of shares acquired on May 26, 2009.
(4)	Weighted average price of shares acquired on May 27, 2009.
(5)	Weighted average price of shares acquired on May 28, 2009.
(6)	After giving effect to all transactions reported in this Form 4, the aggregate amount of Common Stock held by RMCP II as of May 28, 2009, is 4,605,282 shares.
Remarks: This Form 4 is jointly filed by (i) RMCP II, (ii) RMCP III, (iii) RMCP GP LLC ("RMCP GP"), (iv) Red Mountain Capital Partners LLC ("RMCP LLC"), (v) Red Mountain Capital Management, Inc. ("RMCM"), and (vi) Mr. Mesdag. RMCP GP is the general partner of each of RMCP II and RMCP III. RMCP LLC is the managing member of RMCP GP. RMCM is the managing member of RMCP LLC. Mr. Mesdag is the president, sole executive officer, sole director and sole shareholder of RMCM. Each of Mr. Mesdag, RMCM, RMCP LLC and RMCP GP, by virtue of their direct or indirect control of RMCP II and RMCP III, may be deemed to beneficially own some or all of the securities reported as being held by RMCP II and RMCP III. Each of the reporting persons hereunder disclaims beneficial ownership of the reported securities except to the extent of its or his pecuniary interest therein. In addition, RMCP II disclaims beneficial ownership of any securities held directly by RMCP III, and RMCP III disclaims beneficial ownership of any securities held directly by RMCP II. This Form 4 shall not be deemed to be an admission that any reporting person hereunder is the beneficial owner of any of the reported securities for purposes of Section 16 of the Securities Exchange Act of 1934, as amended, or for any other purpose.

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