Thank you for choosing Aerospace-Aviation360 for Part Number RFS4040 by Fairchild for model Fairchild SA227 which is described as Stationary Disc . This is an ASAP Semiconductor owned and operated website. We are a leading supplier of aircraft Commuter Brake parts like RFS4040. You have 24/7 x 365 access to our diverse product database with the fastest lead times in the industry.