Department of the Interior (DOI) Office of Aviatio

The Department of the Interior's Office of Aviation is seeking to procure one Continental IO-520D-108B factory re-manufactured, zero total time engine for utilization on a Cessna 185 aircraft. The Interior Business Center, which serves as the contracting entity, has established a total small business set-aside for this opportunity. The solicitation specifies a Continental brand engine and includes justification documentation supporting the brand-name requirement. Key contract requirements include delivery by May 30, 2026, with a performance period running from February 1, 2026 through May 30, 2026. An amendment issued on January 5, 2026 clarified that the engine will not include an alternator but will include a 24-volt starter. The proposal due date is January 12, 2026, and interested vendors should direct inquiries to contracting officer Rachael Davis at (571) 354-7984.

This solicitation is designated as a total small business set-aside, making it available exclusively to eligible small business concerns. The procurement falls under NAICS category 336412 (Aircraft Engine and Engine Parts Manufacturing) and PSC category 2810 (Gasoline Reciprocating Engines, Aircraft Prime Mover; And Components). The contract requires delivery of a single factory re-manufactured engine with zero total time, meeting specific technical requirements for a Cessna 185 aircraft operated by the Office of Aviation Services' Alaska Regional Office. The performance period of approximately four months reflects the timeframe for engine manufacturing and delivery. The Interior Business Center, located in Herndon, Virginia, is managing this acquisition on behalf of the Department of the Interior's aviation operations.