1、_ 6$(7HFKQLFDO6WDQGDUGV%RDUG5XOHVSURYLGHWKDW7KLVUHSRUW LVSXEOLVKHGE6$(WRDGYDQFHWKHVWDWHRIWHFKQLFDODQGHQJL neering sciences. The use of this report is entirely voluntary, and its applicability and suitability for any particular use, LQFOXGLQJDQSDWHQWLQIULQJHPHQWDULVLQJWKHUHIURPLVWKHVROHUHV SRQVLELOLW
2、RIWKHXVHU 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 International All rights reserved. No part of this publication may be reproduced, stored
3、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 (outside USA) Fax: 724-776-0790 Ema
4、il: CustomerServicesae.org SAE WEB ADDRESS: http:/www.sae.org SAE values your input. To provide feedback on this Technical Report, please visit http:/www.sae.org/technical/standards/AS50571B AEROSPACE STANDARD AS50571 REV. B Issued 1999-04 Revised 2016-03 Superseding AS50571A Lights, Instrument, Ind
5、ividual, General Specification For RATIONALE This document shows recommended industry practices, requirements and design recommendations for aircraft instrument lighting. It is a replacement of MIL-L-50571F. The most recent revision to this document was to update the wire type referred to in the doc
6、ument and vote to stabilize as individual instrument lights are obsolete. 1. SCOPE This specification covers the general requirements for red and white individual instrument lights. This document has been streamlined. Appendix A to MIL-L-5057F lists those documents required for MIL-L-5057F acquisiti
7、on and is a mandatory part of MIL-L-5057F. Those documents listed in Appendix A have the same status as those referenced directly in MIL-L-5057F (first tier documents). All other documents, referenced through tiering, may be used as guidance and information to supplement MIL-L-5057F. TKLVGRFXPHQWVVF
8、RSHLVOLPLWHGWRODPSVRXUFHGHVLJQVVROHO)XUWKHUPRUHWKH XVHRIUHGlighting should not be considered for new design and included within this document to support requirements for existing military aircraft that still operate with this system of lighting. 1.1 Classification The lights shall be suitable for cl
9、amp- or flange-mounted instruments or for polysign indicators as specified. The lights shall be furnished in the MS part numbers listed on the standard or for qualified lights which do not conform to any VWDQGDUGWKHPDQXIDFWXUHUVSDUWQXPEHUVOLVWHGRQWKHPDQXIDFWXUHUVGUDZLQJ VHH 2. APPLICABLE DOCUMENTS T
10、he following publications form a part of this document to the extent specified herein. The latest issue of SAE publications shall apply. The applicable issue 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 docume
11、nt and references cited herein, the text of this document takes precedence. Nothing in this document, however, supersedes applicable laws and regulations unless a specific exemption has been obtained. SAE INTERNATIONAL AS50571B Page 2 of 14 2.1 The following documents of the issue in effect on date
12、of invitations for bids form a part of this specification to the extent specified herein. MILITARY SPECIFICATIONS MIL-I-631 Insulation, Electrical, Synthetic-Resin Composition, Nonrigid MIL-C-6390 Clamps and Instruments, Aircraft, Installation of MIL-DTL-6839 Indicator, Symbol Indicating, Landing Ge
13、ar, Position MIL-DTL-6363/8 Lamps, Incandescent Aircraft Service, Single Contact, Midget Flanged Base T-1 Bulb NASM6818 Clamp, Instrument, Mounting, Aircraft STANDARDS Federal FED-STD-595 Colors Military MIL-STD-1916 DOD Preferred Methods for Acceptance of Product MIL-STD-129 Marking for Shipment an
14、d Storage MIL-STD-130 Identification Marking of U.S. Military Property MIL-STD-810 Environmental Engineering Considerations and Laboratory Tests MIL-STD-2073-1D Standard Practice for Military Packaging NASM9006 Recesses - Cross, Low Torque Drive, Dimensions and Gage Dimensions for MS 33545 Case, Ins
15、trument, 5 x 5-1/4, Standard Dimensions for MS 33638 Cases, Instrument, Flange-Mounted, Aircraft MS 33639 Cases, Instrument, Clamp-Mounted, Aircraft (Copies of specifications, standards, drawings, and publications required by contractors in connection with specific procurement functions should be ob
16、tained from the procuring activity or as directed by the contracting officer.) 2.2 Other Publications The following document forms a part of this specification to the extent specified herein. Unless otherwise indicated, the issue in effect on date of invitation for bids or request for proposal shall
17、 apply. SAE INTERNATIONAL AS50571B Page 3 of 14 2.2.1 Consolidated Classification Committee Available from the Consolidated Classification Committee, 202 Chicago Union Station, Chicago, IL 60610. Uniform Freight Classification Rules 2.2.2 ASTM Publications Available from ASTM International, 100 Barr
18、 Harbor Drive, P.O. Box C700, West Conshohocken, PA 19428-2959, Tel: 610-832-9585, www.astm.org. ASTM D3951 Packaging, Commercial ASTM D6251 Standard Specification for Wood-Cleated Panelboard Shipping Boxes 2.2.3 SAE Publications Available from SAE International, 400 Commonwealth Drive, Warrendale,
19、PA 15096-0001, Tel: 877-606-7323 (inside USA and Canada) or +1 724-776-4970 (outside USA), www.sae.org. AS25050 Color, Aeronautical Lights and Lighting Equipment, General Requirements For 3. REQUIREMENTS 3.1 First Article Unless otherwise specified, the lights furnished under this specification shal
20、l be a product which has been inspected and has passed first article inspection specified herein (see 4.3 and 6.3). 3.2 Precedence When the requirements of this specification and the applicable MS standard are in conflict, the requirements of the MS standard shall apply. 3.3 Design and Construction
21、Lights shall conform to the MS standard or, for qualified lights which do not conform to any standard, to the PDQXIDFWXUHUVGUDZLQJ/LJKWVIRUFODPS -mounted instruments shall be contained within the outline shown in Figure 1. Lights for flange-mounted instruments shall be contained within the circumscr
22、ibing square of the mounting flange of the instrument. Lights for polysign indicators shall be contained within the outline shown in Figure 2. No part of any light shall be more than 0.875 inch forward (away from the instrument panel) from the extreme front surface of the instrument case, exclusive
23、of knobs, pushbuttons, etc., nor contained within a right truncated circular cone, the axis of which is the axis of the case of the instrument, the periphery of the truncated end of which is the periphery of the aperture of the case of the instrument, and the side of which makes an angle of 30 degre
24、es with its axis. Lights shall not interfere with operation of any adjusting knobs or screws on the instrument case. 3.3.1 Mounting The light shall be mountable on an instrument panel of any thickness between 0.060 and 0.190 inch inclusive. Lights for clamp-mounted instruments and polysign indicator
25、s shall be mounted by means of 1 or 2 circular holes, each not more than 0.260 inch in diameter in the instrument panel in the locations indicated for capital letters in Figures 1 and 2 as applicable. Lights for flange-mounted instruments shall be mounted by means of 1 or more of the mounting screws
26、 of the instrument, or by means of equivalent devices installed through the mounting holes of the instrument which are part of, or are furnished with the light, which shall serve to mount the instrument as well as the light. SAE INTERNATIONAL AS50571B Page 4 of 14 Figure 1 - Dimensions and mounting
27、of lights for clamp-mounted instruments PERIPHERY OF ACTUATOR OF INSTRUMENT MOUNTING CLAMP (DIAMETER IN ACCORDANCE WITH MIL-C-6818, LOCATED IN ACCORDANCE WITH MIL-C-6390) PERIPHERY OF HEAD OF MOUNTING SCREW OF INSTRUMENT MOUNTING CLAMP (DIAMETER IN ACCORDANCE WITH NASM6818) (SEE NOTE) PERIPHERY OF A
28、CTUATOR OF INSTRUMENT MOUNTING CLAMP (DIAMETER IN ACCORDANCE WITH NASM6818, LOCATED IN ACCORDANCE WITH MIL-C-6390) SAE INTERNATIONAL AS50571B Page 5 of 14 Figure 2 - Dimensions and mounting of lights for polysign indicators 3.3.1.1 Holes for Lead Wires Lights for flange-mounted magnetic compasses ma
29、y also employ 1 circular hole not more than 0.188 inch in diameter on the instrument panel, or 2 circular holes, each not more than 0.125 inch in diameter, in the instrument panel for lead wires. Lights for other instruments may also employ 1 circular hole not more than 0.125 inch in diameter in the
30、 instrument panel for a lead wire. 3.3.2 Lamp The lights shall conform to this specification, except for the maximum weight requirement, with 1 or more MIL-DTL-6363/8 lamps installed, but shall not include any lamp unless so indicated by its part number. For lights including lamps, the dash number o
31、nly for the lamp shall be added to the part number of the light. Part numbers of lights which include lamps shall be marked on their shipping containers only. 3.3.3 Electrical Circuit Electrical circuits of lights for flange-mounted magnetic compasses shall not be connected to the bodies, cases, fra
32、mes, or means for mounting of the lights. Lights for all other instruments shall employ a ground return through the instrument panel for 1 side of their electrical circuits. If 2 or more lamps are used, they shall be connected parallel to each other. No light shall include any other part having any
33、significant electrical parameter. 3.3.4 Lead Wires Lead wires shall conform to M81044/9, and shall be at least 36 inches long. If the wire passes through a hole in the instrument panel, it shall be covered from inside the light to at least 2 inches from the panel with an insulating sleeving conformi
34、ng to type F, form U, Grade A of MIL-I-631. SAE INTERNATIONAL AS50571B Page 6 of 14 3.3.5 Use of Tools The lights shall be made so that the amount and distribution of the light output cannot be changed without the use of tools, but so that the lamp(s) can be removed and replaced without the use of t
35、ools. 3.3.6 Mounting Screws The mounting screws shall be in accordance with NASM9006. 3.4 Color of Light Light provided by each red light shall conform to AS25050 for aviation red and also shall be not paler or yellower than NBS No. 3215 filter. Optical paths of white lights shall be color nonselect
36、ive. When Instrument Panel Lighting (IPL) white or Air Force Blue white lighting are used, they shall be in accordance with AS25050. 3.5 Performance 3.5.1 Dielectric When tested in accordance with 4.6.4, there shall be no breakdown of insulation. 3.5.2 Operation For all tests requiring operation of
37、the light, energization shall be accomplished as specified below. The error of the voltmeter used for measuring the potential shall not exceed 0.05 V. The lights shall conform to all requirements of this specification with a potential having an effective value of 28 V and a frequency of 400 cps 20 c
38、ps, or direct current (DC), applied to its electrical connections (see 4.6.5 through 4.6.8). 3.5.2.1 Operation at Low Temperature The light shall operate satisfactorily when subjected to the test specified in 4.6.6. 3.5.2.2 Operation at High Temperature The light shall operate satisfactorily when su
39、bjected to the test specified in 4.6.7. 3.5.2.3 Operation Under Vibration The light shall operate satisfactorily, and shall show no signs of breakage when subjected to the test specified in 4.6.8. 3.5.3 Resistance to Shock The light shall show no signs of breakage, and shall operate properly when su
40、bjected to the test specified in 4.6.9. 3.5.4 Resistance to Fungus There shall be no noticeable effect of exposure to fungus when subjected to the test specified in 4.6.10. 3.5.5 Resistance to Humidity The light shall operate satisfactorily when subjected to the humidity test specified in 4.6.11. 3.
41、5.6 Resistance to Corrosion The light shall operate satisfactorily after being subjected to the salt spray test specified in 4.6.12. SAE INTERNATIONAL AS50571B Page 7 of 14 3.5.7 Light Output The light output shall be within the tolerances specified in 4.6.13 when tested as specified in 4.6.13. 3.5.
42、8 Angle of Visibility Lights shall be such that, when mounted on the instrument, and located within a cone of visibility from 4 degrees above to 40 degrees below the horizontal axis of the observer and from 40 degrees on 1 side to 40 degrees on the other side of the straight forward direction of the
43、 observer, the light shall not reduce the instrument visibility which exists without a light (see 4.6.14). 3.5.9 Dimensions The dimensions of the light shall be as specified on the applicable standard. 3.5.10 Weight The weight of the light shall not exceed the value specified on the applicable MS st
44、andard or, for qualified lights which do not conform to any standard, on WKHPDQXIDFWXUHUVGUDZLQJ 3.6 Finish All parts of the light, except those from which the light is emitted which are visible from the front (dial) side of the instrument panel when the light is installed, shall have a black finish
45、 conforming to Color No. 37038 of Federal Standard No. 595. 3.7 Identification Marking Parts, subassemblies, and lights shall be marked for identification in accordance with MIL-STD-130. 3.8 Workmanship The light, including all parts and accessories shall be fabricated and finished in a thoroughly w
46、orkmanlike manner. Particular attention shall be given to freedom from burrs and sharp edges, accuracy of dimensions, and marking of parts and assemblies. 3.8.1 Cleaning The light shall be thoroughly cleaned, and loose, spattered, or excess solder, metal chips, and other foreign material removed dur
47、ing and after final assembly. 4. QUALITY ASSURANCE PROVISIONS 4.1 Responsibility for Inspection Unless otherwise specified in the contract or purchase order, the supplier is responsible for the performance of all inspection requirements as specified herein. Except as otherwise specified in the contract or purchase order, the supplier may use his own or any other facilities suitable for the performance of the inspection requirements specified herein, unless disapproved
