Methods for Determining the Seat Reference Point (SRP) and the Buttock Reference Point (BRP) for Seats in Transport Aircraft, Civil Rotorcraft, and General Aviation Aircraft
This Aerospace Recommended Practice (ARP) defines acceptable methods for determining the seat reference point (SRP), and the documentation requirements for that determination, for passenger and crew seats in Transport Aircraft, Civil Rotorcraft, and General Aviation Aircraft.
The methods for determining the Seat Reference Point (SRP) for aircraft seats were originally contained in AS8049 and were recently moved to ARP5526. The SRP is a feature of the seat that is used in multiple SAE aircraft seat documents, as well as regulatory standards and guidance. These methods should be located in a separate document, where they can be referenced by other documents, maintained independent of changes to other documents and eventually stabilized. The method used for determining the Buttock Reference Point (BRP) for aircraft seats has not been clearly defined, is a feature that is used in multiple documents, and should also be located in this document.