NAVSUP Weapon Systems Support (NAVSUP WSS) Philadelphia intends to solicit on a sole-source basis with Arkwin Industries, Inc. for repair of C-130 directional linear valves (NIIN 009082931, P/N 4A037-1), since Arkwin is the OEM and only known source and no drawings/data are available. All responsible sources may submit capability statements, proposals, or quotations, but non-approved firms must submit a Source Approval Request, and the procurement will not be delayed for SAR approval; this notice is not a request for competitive proposals. The contract duration will be one year, with UID and Buy American clauses applying, under NAICS 332919 and PSC 4810. The solicitation will be posted electronically to NECO with an approximate issue date of 11 November 2026. Award is anticipated in March 2027.