1、_SAE Technical Standards Board Rules provide that: “This report is published by SAE to advance the state of technical and engineering sciences. The use of this report is entirely voluntary, and its applicability and suitability for any particular use, including any patent infringement arising theref
2、rom, is the sole responsibility of the user.”SAE reviews each technical report at least every five years at which time it may be revised, reaffirmed, stabilized, or cancelled. SAE invites your written comments and suggestions.Copyright 2016 SAE InternationalAll rights reserved. No part of this publi
3、cation may be reproduced, stored in a retrieval system or transmitted, in any form or by any means, electronic, mechanical, photocopying, recording, or otherwise, without the prior written permission of SAE.TO PLACE A DOCUMENT ORDER: Tel: 877-606-7323 (inside USA and Canada)Tel: +1 724-776-4970 (out
4、side USA)Fax: 724-776-0790Email: CustomerServicesae.orgSAE WEB ADDRESS: http:/www.sae.orgSAE values your input. To provide feedbackon this Technical Report, please visithttp:/www.sae.org/technical/standards/AS1614DAEROSPACESTANDARDAS1614 REV. DIssued 1981-08Reaffirmed 2010-08Revised 2016-01Supersedi
5、ng AS1614CMain Line Aircraft Tow Bar Attach Fitting InterfaceRATIONALEEditorial changes, applicable documents update and requirements homogenization with ISO 8267-1.TABLE OF CONTENTS1. SCOPE 2 1.1 Purpose. 2 1.2 Field of Application 2 2. APPLICABLE DOCUMENTS 2 2.1 SAE Publications. 2 2.2 Regulatory.
6、 2 2.3 ISO Publications 2 3. EFFECTIVITY . 3 4. REQUIREMENTS . 3 4.1 Towing Loads 3 4.2 Aircraft Attachment Fitting Location 3 4.3 Aircraft Weight Categories 3 4.4 Tow Bar Attachment Fitting Configuration, Dimensions and Clearances. 4 4.5 Required Tow Bar Fit 4 5. NOTES 5 5.1 Revision Indicator 5 Fi
7、gure 1 Pin dimensions/clearances . 4Table 1 Aircraft weight categories 3Table 2 Nominal pin dimensions 4SAE INTERNATIONAL AS1614DPage2of 51. SCOPE1.1 PurposeThis SAE Aerospace Standard (AS) specifies the interface requirements for tow bar attachment fittings on the nose gear (when towing operations
8、are performed from the nose gear) of conventional tricycle type landing gears of commercial civil transport aircraft with a maximum ramp weight higher than 50,000 kg (110,000 pounds), commonly designated as “main line aircraft”.Its purpose is to achieve tow bar attachment fittings interface standard
9、ization by aircraft weight category (which determines tow bar forces) in order to ensure that one single type of tow bar with a standard connection can be used for all aircraft types within or near that weight category, so as to assist operators and airport handling companies in reducing the number
10、of different tow bar types used.1.2 Field of ApplicationThis document is intended to be applicable to all new models of main line aircraft within the specified maximum ramp weight range, entering service or designed after its original date of publication. See Section 3.It is not intended to apply to
11、 previously in service main line aircraft models, which present a considerable variety of tow bar attachment fittings.2. APPLICABLE DOCUMENTSThe following publications form a part of this document to the extent specified herein. The latest issue of SAE publications shall apply. The applicable issue
12、of other publications shall be the issue in effect on the date of the purchase order. In the event of conflict between the text of this document and references cited herein, the text of this document takes precedence. Nothing in this document, however, supersedes applicable laws and regulations unle
13、ss a specific exemption has been obtained.2.1 SAE PublicationsAvailable from SAE International, 400 Commonwealth Drive, Warrendale, PA 15096-0001, Tel: 877-606-7323 (inside USA and Canada) or +1 724-776-4970 (outside USA), www.sae.org.AS5488 Regional Aircraft Towbar Attach Fitting Interface2.2 Regul
14、atoryAvailable from U.S. Government Printing Office, M/S SSOP, Washington DC 20402-9328.Federal Aviation Regulations 14CFR Part 25, Airworthiness Standards: Transport category airplanes, paragraph 25.509, Towing loadsAvailable from European Aviation Safety Agency: Ottoplatz 1, D-50679 Cologne, Germa
15、ny - http:/easa.europa.eu/official-publication/Certification Specifications and Acceptable Means of Compliance for Large Aeroplanes CS-25, paragraph 25.509, Towing loads2.3 ISO PublicationsCopies of these documents are available online at http:/webstore.ansi.org/.ISO 8267-1 Aircraft - Tow bar attach
16、ment fitting - Interface requirements - Part 1: Main line aircraftISO 8267-2 Aircraft - Tow bar attachment fitting - Interface requirements - Part 2: Regional aircraftSAE INTERNATIONAL AS1614DPage3of 53. EFFECTIVITY3.1 This document is applicable to commercial transport aircraft airworthiness certif
17、ied under FAR Part 25/CS-25 with a maximum ramp weight over 50,000 kg (110,000 pounds). It does not apply to aircraft airworthiness certified under FAR Part 25/CS-25 with a maximum ramp weight under 50,000 kg (110,000 pounds), which are covered by AS5488 and/or ISO 8267-2.3.2 Where a family of exist
18、ing or contemplated aircraft types bridges two weight categories, a single towbar attachment fitting interface should be used for all of them, and consideration should be given to possible use of the standard dimensions for the higher weight category throughout the family.NOTE: Inasmuch as practical
19、, this document was defined in order to be compatible with as many existing aircraft types as possible in the weight category concerned.4. REQUIREMENTS4.1 Towing LoadsThe aircraft nose landing gear tow bar attachment fitting shall be able to react the limit towing loads prescribed in FAR Part 25/CS-
20、25, paragraph 25.509 (d), based on the following towing load FTOW :-FTOW = 0.15 Wr, where Wr is aircraft maximum ramp weight, for Wr in excess of 45,360 kg (100,000 pounds).4.2 Aircraft Attachment Fitting LocationThe fitting shall be designed to enable simple attachment of the tow bar at the front a
21、nd (when requested by the acquiring airline) at the rear of the nose landing gear for push-pull towing operations. 4.3 Aircraft Weight CategoriesSee Table 1.Table 1 - Aircraft weight categoriesCategory Maximum Ramp WeightIIIIIIIVV50,000 kg (110,000 pounds) to 100,000 kg (220,000 pounds)100,000 kg (2
22、20,000 pounds) to 180,000 kg (400,000 pounds)180,000 kg (400,000 pounds) to 350,000 kg (770,000 pounds)350,000 kg (770,000 pounds) to 500,000 kg (1,100,000 pounds)over 500,000 kg (1,100,000 pounds)NOTE: The tow bar attachment fitting category shall be selected in such a way that no change of type wi
23、ll be necessaryduring aircraft development. For aircraft whose design maximum ramp weight is near the top limit of a weight category, it may be classified in the next higher category to allow for weight growth.SAE INTERNATIONAL AS1614DPage4of 54.4 Tow Bar Attachment Fitting Configuration, Dimensions
24、 and ClearancesThe standard configuration of the attachment fitting shall be a horizontal cylindrical pin (Table 2, Figure 1).Table 2 - Nominal pin dimensionsDimension Category I Category II Category III Category IV Category VA(diameter)B(length)38.10 mm(1.50 inches)113.03 mm(4.45 inches)44.45 mm(1.
25、75 inches)133.35 mm(5.25 inches)57.15 mm(2.25 inches)184.15 mm(7.25 inches)63.50 mm(2.50 inches)203.20 mm(8.00 inches)85.85 mm(3.38 inches)203.20 mm(8.00 inches)Required clear space envelope:3 A above and below pin centerFigure 1 - Pin dimensions/clearances4.5 Required Tow Bar FitThe design of the t
26、ow bar device that clamps to the horizontal cylindrical pin shall:a. grip the pin uniformly over 96 to 98% of the length (B dimension),b. be adjustable in order to provide positive engagement on the pin when locked.SAE INTERNATIONAL AS1614DPage5of 55. NOTES5.1 Revision IndicatorA change bar (l) loca
27、ted in the left margin is for the convenience of the user in locating areas where technical revisions, not editorial changes, have been made to the previous issue of this document. An (R) symbol to the left of the document title indicates a complete revision of the document, including technical revisions. Change bars and (R) are not used in original publications nor in documents that contain editorial changes only.PREPARED BY SAE SUBCOMMITTEE AGE-2C, VEHICLE MAINTENANCE AND AIRCRAFT SERVICING OF COMMITTEE AGE-2, AIR CARGO AND AIRCRAFT GROUND EQUIPMENT AND SYSTEMS
