Sources Sought: Urgent – NCMS is Assisting the U.S. Air Force in Seeking Materials to Create Dorsal Longerons for Use on the B-1

The U.S. Air Force has an immediate need for 1 billet of materials to create Dorsal Longerons (DL) for the B-1. All suppliers that have this material available are encouraged to respond.


Materials are scarce and in high demand due to the supply chain disruption from the Covid-19 pandemic. The U.S. Air Force urgently needs 1 billet of materials to create Dorsal Longerons for the upper fuselage repair efforts for the B-1 Bomber. Without this material, work will stop in a matter of weeks leading to a potential significant schedule delay. Companies that can deliver material for this immediate B-1 need may have the opportunity to supply up to 36 additional billets of DL materials for multiple B-1 repairs into the future, starting in FY23 with 5 delivered per year.


Below you will find the required material specifications.

Required Material Specifications

SS 10.2 X 172.0
ZN 109B



Please review the following FAQ document for additional details.

Q: What are you looking for? 4” diameter bar stock? 4”x 10.2” x 172” long bar stock?
A: The stock should be 4” thick x 10.2” wide x 172” long, minimum. Excess can always be machined off.

Q: Any ideas on quantities needed now as well as potential annual quantities?
A: 1 billet of material right now. If possible, could we get pricing on 36 additional billets of material? 5 delivered / year, starting in FY23.

Q: Would machining and processing of the billet be a part of the work package?
A: Machining and processing of the billet is not required.

Q: Can the material be 3D printed?
A: Unfortunately the Air Force cannot accept a 3D printed part for this critical structural component at this time.


Responses to this critical Sources Sought need to provide the following:

  • Please provide the pricing and time required for 1 billet
  • If possible, provide pricing for 36 billets starting in FY23, with 5 delivered per year
  • Please provide material location

All responses, questions, or concerns can be addressed to

Form submission was closed on 7/26/21.


Disclaimer and other Legal Information

Responding to a Sources Sought, RFI or Survey does not guarantee that a CTMA Program Initiative will result. By submitting a response, you are agreeing to allow NCMS to share your information with the United States Government. All submissions containing proprietary information shall be marked accordingly.

Any industry or academia participant awarded a contract, by a participating government sponsor pursuant to a Sources Sought, RFI or Survey, will be compensated, under the agreement, on a cost-reimbursable basis. Each project participant will be expected to share in the total project cost by contributing cash or in-kind resources.

Under the CTMA Program, the parties shall limit participation on the project to (1) U.S. citizens, (2) lawful permanent residents as defined by 8 U.S.C. 1101(a)(20), (3) other protected individuals as defined by 8 U.S.C. 1324b(a)(3) and (4) Canadian citizens (pursuant to the principles underlying the Canada-U.S. Free Trade Agreement), if such participation will involve visual inspection of the Technology, Intellectual Property or Technical Information, or oral exchanges of information about the foregoing. We also require the project participants to furnish NCMS, upon request, with proof of the citizenship status of its personnel participating on the project, including (1) U.S. citizens; (2) legal permanent residents; and (3) foreign nationals who are not permanent residents. In instances where it is necessary to involve foreign national employees in the visual inspection of the Technology, Intellectual Property, or Technical Information, or oral exchanges of information about the foregoing, the parties will be required to furnish to NCMS proof of appropriate valid export license, or technical assistance agreement, or exemption from licensing requirements (e.g. Canadian exemption) to the extent required by the International Traffic In Arms Regulations (“ITAR”) or the Export Administration Regulations (“EAR”). A copy of such license or agreement shall be furnished to NCMS before any disclosure of information to such foreign person. In the event a party believes that the subject matter of the project agreement is not covered by ITAR, that party may request a written waiver of the requirements of foreign national provision in the CTMA Agreement, which may be granted if the NCMS contracting officer agrees that ITAR does not cover the subject matter.

These requirements also apply to individuals who have dual citizenship status.