This is a sole source requirement for the repair of two Damper Assemblies, which are designated as Critical Safety Items requiring Government Source Approval. The work is intended to be awarded under an already established Basic Ordering Agreement (BOA) to the current source, as the government lacks sufficient data to contract with others. Prospective bidders who are not already approved sources must submit source approval information with their proposal, as the award timeline cannot accommodate a new source approval process. The performance location is NAVSUP WSS Philadelphia.