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 reaffirmed, revised, or cancelled. SAE invites your written comments and suggestions. Copyright 2010 SAE International All rights reserved. No part of this publication ma
3、y 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 (outside US
4、A) Fax: 724-776-0790 Email: CustomerServicesae.org SAE WEB ADDRESS: http:/www.sae.orgSAE values your input. To provide feedback on this Technical Report, please visit http:/www.sae.org/technical/standards/AS50571AAEROSPACESTANDARDAS50571 REV. A Issued 1999-04 Revised 2010-01 Superseding AS50571 Ligh
5、ts, Instrument, Individual, General Specification For RATIONALEThis document shows recommended industry practices, requirements and design recommendations for aircraft instrument lighting. It is a replacement of MIL-L-50571F. The most recent revisions to this document was to update the reference doc
6、uments and eliminate an non-magnetic lamp requirement from this specification1. SCOPE 1.1 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-50
7、57F acquisition 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. Th
8、is documents scope is limited to lamp source designs solely. Furthermore, the use of red lighting 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. 1.2 Classification The l
9、ights shall be suitable for clamp- 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 standard, the manufacturers part numbers listed on the manufacture
10、rs drawing (see 6.2). 2. APPLICABLE DOCUMENTS The 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 the other publications shall be the issue in effect on the date of the purchase order. In th
11、e 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 unless a specific exemption has been obtained. 2.1 The following documents of the issue in effe
12、ct on date 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,
13、 Landing Gear, Position Copyright SAE International Provided by IHS under license with SAENot for ResaleNo reproduction or networking permitted without license from IHS-,-,-SAE AS50571A Page 2 of 14MIL-DTL-6363/8 Lamps, Incandescent Aircraft Service, Single Contact, Midget Flanged Base T-1 Bulb NASM
14、6818 Clamp, Instrument, Mounting, Aircraft STANDARDSFederalFED-STD-595 Colors MilitaryMIL-STD-1916 DOD Preferred Methods for Acceptance of Product MIL-STD-129 Marking for Shipment and Storage MIL-STD-130 Identification Marking of U.S. Military Property MIL-STD-810 Environmental Test Methods MIL-STD-
15、2073-1D Standard Practice for Military Packaging NASM9006 Recesses - Cross, Low Torque Drive, Dimensions and Gage Dimensions for MS 33545 Case, Instrument, 5 x 5-1/4, Standard Dimensions for MS 33549 Case, Instrument, 2-3/4 Dial, With Sump, Standard Dimensions for MS 33556 Case, Aircraft Instrument,
16、 3-1/4 Inch Size, 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 obta
17、ined 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 a
18、pply. 2.2.1 Consolidated Classification Committee Available from the Consolidated Classification Committee, 202 Chicago Union Station, Chicago, IL 60610. Uniform Freight Classification Rules Copyright SAE International Provided by IHS under license with SAENot for ResaleNo reproduction or networking
19、 permitted without license from IHS-,-,-SAE AS50571A Page 3 of 142.2.2 American Society of Testing and Materials (ASTM International) Availablefrom ASTM International, 100 Barr Harbor Drive, P.O. Box C700, West Conshohocken, PA 19428-2959, Tel: 610-832-9585, www.astm.org.ASTM-D-3951 Packaging, Comme
20、rcial ASTM-D-6251 Standard Specification for Wood-Cleated Panelboard Shipping Boxes 2.2.3 SAE Publications Available from SAE International, 400 Commonwealth Drive, Warrendale, PA 15096-0001, Tel: 877-606-7323 (inside USA and Canada) or 724-776-4970 (outside USA), www.sae.org.AS25050 Color, Aeronaut
21、ical, Lights and Lighting Equipment, General Requirements for AS50861 Wire, Electric, Polyvinyl Chloride Insulated, Copper or Copper Alloy 3. REQUIREMENTS 3.1 First Article Unless otherwise specified, the lights furnished under this specification shall be a product which has been inspected and has p
22、assed 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 Lights shall conform to the MS standard or, for q
23、ualified lights which do not conform to any standard, to the manufacturers drawing. Lights for clamp-mounted instruments shall be contained within the outline shown in Figure 1. Lights for flange-mounted instruments shall be contained within the circumscribing square of the mounting flange of the in
24、strument. 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 of knobs, pushbuttons, etc., nor contained wi
25、thin 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 degrees with its axis. Lights shall not interfere
26、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 indicators shall be mounted by means of one or two cir
27、cular 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 one or more of the mounting screws of the instrument, or by means of equi
28、valent 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. Copyright SAE International Provided by IHS under license with SAENot for ResaleNo reproduction or networking perm
29、itted without license from IHS-,-,-SAE AS50571A Page 4 of 14FIGURE 1 - DIMENSIONS AND MOUNTING OF LIGHTS FOR CLAMP-MOUNTED INSTRUMENTS. Copyright SAE International Provided by IHS under license with SAENot for ResaleNo reproduction or networking permitted without license from IHS-,-,-SAE AS50571A Pa
30、ge 5 of 14FIGURE 2 - DIMENSIONS AND MOUNTING OF LIGHTS FOR POLYSIGN INDICATORS. 3.3.1.1 Holes for Lead Wires Lights for flange-mounted magnetic compasses may also employ one circular hole not more than 0.188 inch in diameter on the instrument panel, or two circular holes, each not more than 0.125 in
31、ch in diameter, in the instrument panel for lead wires. Lights for other instruments may also employ one circular hole not more than 0.125 inch in diameter in the instrument panel for a lead wire. 3.3.2 Lamp The lights shall conform to this specification, except for the maximum weight requirement, w
32、ith one or more MIL-L-6363/8 lamps installed, but shall not include any lamp unless so indicated by its part number. For lights including lamps, the dash number only 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 shipp
33、ing containers only. 3.3.3 Electrical Circuit Electrical circuits of lights for flange-mounted magnetic compasses shall not be connected to the bodies, cases, frames, or means for mounting of the lights. Lights for all other instruments shall employ a ground return through the instrument panel for o
34、ne side of their electrical circuits. If two or more lamps are used, they shall be connected parallel to each other. No light shall include any other part having any significant electrical parameter. 3.3.4 Lead Wires Lead wires shall conform to MIL-W-5086/1-20, and shall be at least 36 inches long.
35、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 sleevingconforming to type F, form U, Grade A of MIL-I-631. Copyright SAE International Provided by IHS under license with SAENot for ResaleNo r
36、eproduction or networking permitted without license from IHS-,-,-SAE AS50571A Page 6 of 143.3.5 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 us
37、e of tools. 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 non
38、selective. 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 operati
39、on of the light, energization shall be accomplished as specified below. The error of the voltmeter used for measuring the potential shall not exceed 0.05 volt (V). The lights shall conform to all requirements of this specification with a potential having an effective value of 28V and a frequency of
40、400 20 cycles per second (cps), 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 op
41、erate satisfactorily when subjected 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 sh
42、all operate properly when subjected 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
43、test specified in 4.6.11. 3.5.6 Resistance to Corrosion The light shall operate satisfactorily after being subjected to the salt spray test specified in 4.6.12. Copyright SAE International Provided by IHS under license with SAENot for ResaleNo reproduction or networking permitted without license fro
44、m IHS-,-,-SAE AS50571A Page 7 of 143.5.7 Light Output The light output shall be within the tolerances specified in 4.6.13 when tested as specified in 4.6.13. 3.5.8 Angle of Visibility Lights shall be such that, when mounted on the instrument, and located within a cone of visibility from 4 degrees ab
45、ove to 40 degrees below the horizontal axis of the observer and from 40 degrees on one side to 40 degrees on the other side of the straight forward direction of the observer, the light shall not reduce the instrument visibility which exists without a light(see 4.6.14). 3.5.9 Dimensions The dimension
46、s 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 standard or, for qualified lights which do not conform to any standard, on the manufacturers drawing. 3.6 Finish All parts of the light, ex
47、cept 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 conforming to Color No. 37038 of Federal Standard No. 595. 3.7 Identification Marking Parts, subassemblies, and lights shall be marke
48、d 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 workmanlike 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 during and after final assembly. 4. QUALITY ASSURANCE PROVISIONS 4.1 Responsibility for Inspection Unl
