ISO INTERNATIONAL STANDARD 12056 First edition 1996-08-15 Aircraft Self-propelled passenger stairs for large capacity aircraft -- Functional requirements Aéronefs --- Escaliers passagers autotractes pour aeronefs gros porteurs - Exigences fonctionnelles ISO Reference number: ISO 12056 1996(E) No reproduction or networking permitted without license from IHS Not for Resale ISO 12056:1996(E) Foreword ISoO (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 technical committee has been established has the right to be represented on that committee. International organizations, governmental and non-governmental, in liaison with isO, also take part in the work IsO collaborates closely with the International Electrotechnical Commission (IEC) on all matters of electrotechnical standardization Draft international Standards adopted by the technical committees are circulated to the member bodies for voting. Publication as an International Standard requires approval by at ieast 75 % of the member bodies casting a vote. International Standard ISO 12056 was prepared by Technical Committee ISO/TC 20, Aircraft and space vehicles, Subcommittee SC 9, Air cargo and ground equipment. for information only. ISO1996 All rights reserved Unless otherwise specified, no part of this publication 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 Printed in Switzerland ii No reproduction or networking permitted without license from IHS Not for Resale ISO ISO12056:1996(E) Introduction Throughout this International Standard, the minimum essential criteria are identified by the use of the key word "should", and while not mandatory are considered to be of primary importance in providing serviceable, economical, and practical passenger stairs. Deviation from the recom- mended criteria should occur only after careful consideration, extensive be satisfactory. ii No reproduction or networking permitted without license from IHS Not for Resale