ISO INTERNATIONAL STANDARD 6702-1 First edition 1991-11-15 Aircraft -- Requirements for on-board weight and balance systems - Part 1: General Aeronefs -- Prescriptions pour les systemes embarques de masse et de centrage - Partie 1: Generalites Reference number ISO 6702-1·1991(E) ISO 6702-1:1991(E) Foreword iso (the international Organization for Standardization) is a worldwide federation of national standards bodies (IsO member bodies). The work of preparing International Standards is normally carried out through Iso technical committees. Each member body interested in a subject for which a technicai committee has been established has the right to be represented on that committee International organizations, govern- mental and non-governmental, in liaison with Iso, also take part in the work. iso collaborates closely with the International Electrotechnical Draft international Standards adopted by the technical committees are circulated to the member bodies for voting. Publication as an Interna- tional'Standard requires approval by at least 75 % of the member bodies casting a vote. International Standard IsO 6702-1 was prepared by Technical Committee iso/T 20, Aircraft and space vehicles, Sub-Committee Sc 9, Air cargo and ground equipment. This first edition of Is0 6702-1 cancels and replaces Is0 6702:1984. Three classes of systems have been designated: class i systems, with a very high level of confidence and of high ac- curacy; class Il systems, with a high level of confidence and of lower accu- racy; class Ill systems, with a high level of confidence, and measuring and displaying only the aircraft balance condition 6702 consists of the following parts, under the general titie ISO Aircraft - Requirements for on-board weight and balance systems. Part 1: General Part 2: Design, performance and interface characteristics C ISO1991 Alt rights reserved. No part of this pubfication may be reproduced or utilized in any form or by, any means, electronic or mechanical, including photocopying and microfilm, without permission in writing from the publisher. International Organization for Standardization Case Postale 56 · CH-1211 Geneve 20: Switzerland PrintedinSwitzeriand ISO 6702-1:1991(E) INTERNATIONAL STANDARD Aircraft --- Requirements for on-board weight and balance systems Part 1: General Section 1: General ARINC 429, Mark 33 Digital Information Transfer 1.1 Scope Systems DITS, Aeronautical Radio Inc. (USA), 1987. This part of iso 6702 specifies requirements for the function, characteristics and installation of an on- 1.3 General requirements board weight and balance system for use on civil transport aircraft 1.3.1 The basic on-board weight and balance sys- tem(OBwWBS)shallprovideadirect,accurate It not intended to specify design methods, mech- measurement and display of the actua! aircraft anisms or material to fulfil the requirements speci- weight and centre of gravity under ground static fied. conditions Optional functions may be included The system shall function independently of any sys- tem external to the aircraft, with the exception of 1.2 Normative references ground electrical power when aircraft power is not available The following standards contain provisions which, through reference in this text, constitute provisions 1.3.2 This part of Is0 6702 specifies requirements of this part of Iso 6702. At the time of publication, for three ciasses of aircraft on-board weight and the editions indicated were valid. All standards are balance systems. subjecttorevision,andpartiestoagreementsbased on this part of tso 6702 are encouraged to investi a) Class I systems shall be of high accuracy and gate the possibility of applying the most recent edi- performance, with a very high level of confi- tionsofthestandardslistedbelowMembersofIEC dence, and shall be capable of measuring and and isO maintain registers of currently valid Inter- displaying both the aircraft weight and aircraft national Standards. balance condition. Iso 6702-2.1991,