EX-4
from DRS
1 page
Mesa Air Group, Inc. 410 N. 44th Street, Suite 700 Phoenix, Arizona 85008 Attention: Brian S. Gillman Re: Shareholders’ Agreement, Made Effective as of March 1, 2011, by and Among Mesa Air Group, Inc. (The “Company”), and Each Holder of Common Stock of the Company (The “Shareholders’ Agreement’’) Dear Mr. Gillman: Sincerely, American Airlines, Inc. By: /S/ Kenneth W. Wimberly Name: Kenneth W. Wimberly Title: Vice President and Deputy General Counsel Acknowledged and Agreed To: Mesa Air Group, Inc. By: /S/ Brian S. Gillman Name: Brian S. Gillman Title: Executive Vice President and General Counsel
12/34/56