BEFORE THE DEPARTMENT OF TRANSPORTATION WASHINGTON, D.C.

Ninety Day Notice of

MESABA AVIATION, INC. and PINNACLE AIRLINES, INC.

of termination of service at Sault Ste Marie, MI

Pursuant to 14 C.F.R. Part 323 Docket OST-2009-0303

NINETY-DAY NOTICE OF TERMINATION OF SERVICE

Communications with respect to this document should be addressed to:

Megan Rae Rosia Vice President, Government Affairs PINNACLE AIRLINES CORP. 1689 Nonconnah Blvd., Suite 111 Memphis, TN 38132 (202) 965-4889 mrosia@pncl.com Maximillian T. Shemesh General Counsel MESABA AIRLINES, INC. 1000 Blue Gentian Road, Suite 200 Eagan, MN 55121 (651) 637-5218 Max.Shemesh@mesaba.com

Dated: July 15, 2011

Note: Objections to this Notice are due on August 4, 2011.BEFORE THE DEPARTMENT OF TRANSPORTATION WASHINGTON, D.C.

Ninety Day Notice of

MESABA AVIATION, INC. and PINNACLE AIRLINES, INC.

of termination of service at Sault Ste Marie, MI

Pursuant to 14 C.F.R. Part 323 Docket OST-2009-0303

NINETY-DAY NOTICE OF TERMINATION OF SERVICE

Pursuant to Part 323 of the Department of Transportation’s Regulations (14

C.F.R. Part 323), Mesaba Aviation, Inc. (“Mesaba”), and Pinnacle Airlines, Inc.

(“Pinnacle”), each a certificated carrier, hereby give notice of intent to discontinue the

current service provided at Sault Ste Marie, MI, effective October 13, 2011.

Mesaba and/or Pinnacle provide service to the community, operating on a feefor-service basis as “Delta Connection” carriers. Delta has notified Mesaba and

Pinnacle that Delta can no longer economically continue this service. Delta is in the

process of retiring all turboprop and numerous small jet aircraft operated by Mesaba and

Pinnacle. All of the Saab 340 aircraft operated by Mesaba for Delta Connection will be

retired by year end. Delta has notified Mesaba and Pinnacle that high fuel costs and low

passenger demand further necessitate the filing of this notice. We intend to submit a bid

to provide continued service under the EAS program at subsidy rates that will enable us

to cover the cost of the operation and a reasonable return on investment.Ninety Day Notice Page 

### 2

Mesaba and Pinnacle are commonly owned by Pinnacle Airlines Corp. The

carriers are jointly filing this notice because, as Mesaba’s Saab aircraft are retired, some

markets may need to be back-filled by Pinnacle-operated regional jets until a

replacement carrier is selected. With the Department’s permission, Pinnacle is currently

providing substitute service in select Mesaba EAS markets. This notice is intended to

cover all Pinnacle/Mesaba service at Sault Ste Marie, regardless of which carrier may be

providing service during the transition period. In the event the Department requires a

hold-in, the carriers request that Mesaba and/or Pinnacle be authorized to provide the

service, and that the Department set reasonable and fully compensatory rates based on

the use of CRJ aircraft, which are the only aircraft available to provide continued service.

The discontinuation of service will c ause service to drop below the EAS

guarantee levels established by the Department. Mesaba and/or Pinnacle is the only

carrier providing service. Complete schedules including routes, arrival and departure

times, equipment types, and operating carrier(s) are as follows:

Sault Ste Marie (CIU)

Marketing

Airline Operating
Airline Org Dst Flight Equip Departure
Time Arrival
Time Op days

DL 9E DTW CIU 4087 CRJ 1305 1430 1234567

DL 9E DTW CIU 3912 CRJ 2008 2133 1234567

Marketing

Airline Operating
Airline Org Dst Flight Equip Departure
Time Arrival
Time Op days

DL 9E CIU DTW 3904 CRJ 0600 0724 1234567

DL 9E CIU DTW 4087 CRJ 1506 1631 1234567Ninety Day Notice Page 

### 3

Respectfully Submitted,

____________________________ Megan Rae Rosia Vice President, Government Affairs Pinnacle Airlines Corp. _______________________ Maximillian T. Shemesh General Counsel Mesaba Airlines, Inc.CERTIFICATE OF SERVICE

I hereby certify that a copy of the foregoing Ninety-Day Notice of Termination of Service has been served this 15 th day of July, 2011, upon the following persons via
certified mail:

The Honorable Anthony Bosbous Mayor: City Hall 225 E. Portage Avenue Sault Ste. Marie, MI 49783

Ms. Kathy Noel Airport Director 5315 Airport Dr Kincheloe, MI 49788

Kirk Steudle, MDOT Director State Transportation Building 425 W. Ottawa St. P.O. Box 30050 Lansing, MI 48909

U.S. Postal Service 475 L’Enfant Plaza S.W. Washington, D.C. 20260 ATTN: Assistant General Counsel – Transportation

_______________________ Maximillian T. Shemesh