NAVSUP Weapon Systems Support Philadelphia intends to issue a sole-source solicitation to Sikorsky for one accessory drive turbine engine gearbox. The government does not own the technical data needed to purchase this part from other sources. While this is a sole-source notice, proposals from other responsible sources received within 45 days of the synopsis will be considered. Any firm not already approved to manufacture this item must submit a Source Approval Request, but the procurement will not be delayed for its approval. Capability statements must be submitted electronically to the specified email address.