RLV-TD uses Flush Air Data Systems (FADS) for autonomous flight management. This air data determination technique is based on flow eld pressure measurements using high accuracy pressure transducers. To improve the angle of attack, slide slip, Mach number & Velocity, the National Committee on Aerodynamic characterization of RLV-TD recommended the use of MEMS based differential pressure transducers. Measurements carred across two Absolute pressure transducer ports. Electronics screened to Class-S level. Succesfully flown in RLV-TD (Re-usable Launch Vehicle-Technology Demonstrator).