Under the Securities Exchange Act of 1934
(Amendment No. 3)

(Name of Issuer)

(Title of Class of Securities)

(CUSIP Number)

(Name, Address and Telephone Number of Person
Authorized to Receive Notices and Communications)

(Date of Event Which Requires Filing of this Statement)

If the filing person has previously filed a statement on Schedule 13G to report the acquisition that is the subject of this Schedule 13D, and is filing this schedule because of §§240.13d-1(e), 240.13d-1(f) or 240.13d-1(g), check the following box. o

Note: Schedules filed in paper format shall include a signed original and five copies of the schedule, including all exhibits. See §240.13d-7 for other parties to whom copies are to be sent.

* The remainder of this cover page shall be filled out for a reporting person’s initial filing on this form with respect to the subject class of securities, and for any subsequent amendment containing information which would alter disclosures provided in a prior cover page.

The information required on the remainder of this cover page shall not be deemed to be “filed” for the purpose of Section 18 of the Securities Exchange Act of 1934 (“Act”) or otherwise subject to the liabilities of that section of the Act but shall be subject to all other provisions of the Act (however, see the Notes).

Continued on the following pages

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This Amendment No. 3 amends and supplements the Schedule 13D originally filed by AAR CORP. on November 13, 2009 relating to common stock, no par value per share, of Mesa Air Group, Inc.  Except as expressly set forth herein, there have been no changes in the information set forth in the Schedule 13D.

Item 5.                    Interest in Securities of the Issuer.

Item 5 is hereby amended and restated in its entirety as follows:

(a)           AAR owns, as of April 20, 2010, 8,739,600 shares of Mesa’s common stock, no par value, which represents 4.98% of the total outstanding shares of common stock, based upon 175,217,249 shares outstanding as of November 4, 2009 as reported by Mesa in its press release dated November 4, 2009.  Ronald R. Fogleman, a director of the Company, owns 200 shares of Mesa’s common stock, no par value, which represents less than one-tenth of one percent of the total outstanding shares as reported by Mesa in its press release dated November 4, 2009.

(b)           AAR has sole voting power and sole dispositive power with respect to the 8,739,600 shares.  Ronald R. Fogleman shares voting and dispositive power with respect to the 200 shares with his wife.

(c)           AAR effected the sale transactions relating to the common stock in the open market between January 12, 2010 (the date that certain Amendment No. 2 to the 13D was filed) and April 20, 2010 as more fully described in Schedule A attached hereto.

(d)           Not applicable.

(e)           AAR ceased to be the beneficial owner of more than 5% of Mesa’s common stock on April 20, 2010.

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SIGNATURE

After reasonable inquiry and to the best of its knowledge and belief, the undersigned certifies that the information set forth in this statement is true, complete and correct.

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Schedule A

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