This Aerospace Standard (AS) presents a system of graphic symbols intended primarily for usage in hydraulic and pneumatic system schematic diagrams for all types of aircraft. It is also considered suitable for marine vehicles and other applications and for ancillary documents where schematics are required. Individual graphic symbols shown herein are also considered suitable for use in conjunction with other types of symbols. This AS is intended to promote industry-wide acceptance and understanding of uniform standards and employs, where possible, symbols which are internationally recognized.
AS1290 has been updated to Revision B for the following reasons: (a) The emphasis of the document has changed from being based on producing schematic diagrams using paper drawings to those being produced using a computer drawing program (b) New symbols and technical information have been introduced (c) The references called up in the document have been updated (d) The entire document has been retyped and reformatted; editorial changes have also been made to improve its readability (e) The Foreword has been revised