1、AECMA PREN*Z591- 421 96 10I123Ll1 OOL0409 TB4 Edition approved for publication AECMA STANDARD NORME AECMA AECMA NORM Comments should be sent within six months after the date of publication to C2 Chairman prEN 2591 -421 Edition P 1 May 1996 PUBLISHED BY THE EUROPEAN ASSOCIATION OF AEROSPACE INDUSTRIE
2、S (AECMA) Gulledelle 94 - 6-1200 BRUXELLES - Tel. (32) 2 775 81 10 - Fax. (32) 2 775 81 11 ICs : 49.060 Descriptors : Aircraft industry, aircraft equipment, connecting equipment, test Srie arospatiale Organes de connexion lectrique et optique Mthodes dessais Partie 421 : Chute libre ENGLISH VERSION
3、Aerospace series Elements of electrical and optical connection Test methods Part 421 : Free fall Luft- und Raumfahrt Elektrische und optische Verbindungselemente Prfverfahren Teil 421 : Freier Fall This “Aerospace Series“ Prestandard has been drawn up under the responsibility of AECMA (The European
4、Association of Aerospace Industries). It is published on green paper for the needs of AECMA-Members. It has been technically approved by the experts of the concerned Technical Committee following comment by the Member countries. Subsequent to the publication of this Prestandard, the technical conten
5、t shall not be changed to an extent that interchangeability is affected, physically or functionally, without re-identification of the standard. After examination and signature of the AECMA Standard Checking Centre (NPS) and formal agreement of the Officiai Services of the Member countries it wili be
6、 submitted as a draft European Standard to CEN (European Committee for Standardiza tion) for formal vote. Nota - Extra copies can be supplied by B.N.A.E. - Technopolis 54 - 199, rue Jean-Jacques Rousseau - 921 38 ISSY-LES-MOULINEAUX CEDEX 1996-05-3 1 AECMA Gulledelle 94 B-1200 BRUXELLES Mr Pezzetta
7、I I I aecma 19: - AECMA PREN*259L- 421 96 1012311 OOL04LL 632 Page 3 prEN 2591-421 : 1996 1 Scope This standard specifies a method of verifying the ability of an element of connection to withstand shock when submitted to repeated falls. It shall be used together with EN 2591. 2 Normative references
8、This European Standard incorporates by dated or undated reference provisions from other publications. These normative references are cited at the appropriate places in the text and the publications are listed hereafter. For dated references, subsequent amendments to or revisions of any of these publ
9、ications apply to this European Standard only when incorporated in it by amendment or revision. For undated references the latest edition of the publication referred to applies. EN 2591 Aerospace series - Elements of electrical and optical connection - Test methods - General EN 2591-101 Aerospace se
10、ries - Elements of electrical and optical connection - Test methods - Part 101 : Visual examination EN 2591-408 Aerospace series - Elements of electrical and optical connection - Test methods - Part 408 : Mating and unmating forces 3 Preparation of specimens Non-mated and non-wired specimens shall b
11、e fitted with their normal accessories as specified. Unless specified in the technical specification, the following details shall be stated : - type of accessory; - number of revolutions if different from 50. 4 Apparatus A drum such as defined by figure 1 Steel plate 3 mm thick *- l 500 Figure 1 Pag
12、e 4 prEN 2591-421 : 1996 5 Method 5.1 Procedure The specimens shall ,e put into the drum which rotates at a speed of about five revolutions per minute. Unless otherwise indicated in the technical specification, the number of revolutions (falls) shall be 50. 5.2 Final measurements (if applicable) - EN 2591-101; - EN 2591-408.
