BEFORE THE DEPARTMENT OF TRANSPORTATION WASHINGTON, D.C.

Ninety Day Notice of

MESABA AVIATION, INC. and PINNACLE AIRLINES, INC.

of termination of service at Thief River Falls, MN

Pursuant to 14 C.F.R. Part 323 Docket OST-2001-10642

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 Thief River Falls, MN

Pursuant to 14 C.F.R. Part 323 Docket OST-2001-10642

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 Thief River Falls, MN, 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.

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, someNinety Day Notice Page 

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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 Thief River Falls, regardless of which carrier may

be providing service during the transition peri od. 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:

Thief River Falls (TVF)

Marketing

Airline Operating Airline Org Dst Flight Equip Departure Time Arrival Time Op days
DL XJ MSP HIB 2653 SF3 1305 1414 1234567 DL XJ HIB TVF 2653 SF3 1429 1526 12345.7

DL XJ MSP HIB 2477 SF3 2200 2309 1234567 DL XJ HIB TVF 2477 SF3 2324 0017 12345.7

Marketing

Airline Operating Airline Org Dst Flight Equip Departure Time Arrival Time Op days
DL XJ TVF HIB 2610 SF3 0603 0659 123456 DL XJ HIB MSP 2610 SF3 0714 0825 1234567

DL XJ TVF HIB 2654 SF3 1551 1646 12345.7 DL XJ HIB MSP 2654 SF3 1701 1808 12345.7Ninety Day Notice Page 

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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 Steve Nordhagen Mayor City Hall 405 Third Street East P.O. Box 528 Thief River Falls, MN 56701

Mark Borseth Engineering Services Director City of Thief River Falls P.O. Box 528 405 Third Street East Thief River Falls, MN 56701

Minnesota Office of Aeronautics Chris Roy, Director Minnesota DOT Office of Aeronautics Mail Stop 410 222 East Plato Boulevard St. Paul, MN 55107-1618

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

_______________________ Maximillian T. Shemesh