National Energy Extension Service Amendments Act of 1989 - Amends Public Law 95-39 (the Energy Research and Development Administration Appropriation Authorization) to add a new subtitle B: "Engineering Extension Service Act of 1989" which establishes within the Department of Energy an Engineering Extension Service to supply the Federal link with State engineering extension service offices.

Places the administration of such Service within the purview of the Director of the Energy Extension Service. Outlines the manner in which the Service shall disseminate information to small and startup businesses about manufacturing and commercial production techniques to facilitate product development.

Directs the Secretary of Energy to solicit State plans for engineering extension service activities. Mandates that the services provided by the Engineering Extension Service be available to any small or startup business. Authorizes the Director of a State Engineering Extension Service to charge user fees on a sliding scale basis. Authorizes the Secretary to make grants to eligible States to implement such Service. Sets forth allocation guidelines.

Establishes a National Engineering Extension Service Advisory Board with the same structure and functions as the National Energy Extension Service Advisory Board.

Requires the Secretary to report annually to the Congress on the activities and financial status of the cooperative engineering extension work in all States receiving funds under this Act. Authorizes appropriations.