1、AEROS PACE STANDARDAS7768Issued 1998-08L igh t, D esk , Aircra ftFSC 6230NOTICEThis document has been taken directly from U.S. Military Specification MIL-L-7768B, Amendment 1 and contains only minor editorial and format changes required to bring it into conformance with the publishing requirements o
2、f SAE technical standards. The initial release of this document is intended to replace MIL-L-7768B, Amendment 1. Any part numbers established by the original specification remain unchanged.The original Military Specification was adopted as an SAE standard under the provisions of the SAE Technical St
3、andards Board (TSB) Rules and Regulations (TSB 001) pertaining to accelerated adoption of government specifications and standards. TSB rules provide for (a) the publication of portions of unrevised government specifications and standards without consensus voting at the SAE Committee level, and (b) t
4、he use of the existing government specification or standard format.Under Department of Defense policies and procedures, any qualification requirements and associated qualified products lists are mandatory for DOD contracts. Any requirement relating to qualified products lists (QPLs) has not been ado
5、pted by SAE and is not part of this technical report.Reaffirmed 2005-09 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 f
6、or any particular use, including any patent infringement arising therefrom, 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 200
7、5 SAE International All rights reserved. No part of this publication 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
8、: 877-606-7323 (inside USA and Canada) Tel: 724-776-4970 (outside USA) Fax: 724-776-0790 Email: custsvcsae.org SAE WEB ADDRESS: http:/www.sae.org Copyright SAE International Provided by IHS under license with SAENot for ResaleNo reproduction or networking permitted without license from IHS-,-,-SAE A
9、S7768- 2 -1. SCOPE:1.1 Scope:This specification covers the requirements for a light assembly for use on aircraft cabin desks.1.2 Classification:1.2.1 Type: The light assembly covered by this specification shall conform to the type shown on Table I.2. APPLICABLE DOCUMENTS:2.1 The following documents
10、of the issue in effect on date of invitations for bids form a part of this specification to the extent specified herein.SPECIFICATIONSFederalTT-E-527 Enamel, Alkyd, LusterlessPPP-B-636 Boxes, FiberMilitaryMIL-P-116 Preservation-Packaging, Method ofMIL-I-631 Insulation, Electrical, Synthetic-Resin Co
11、mposition, NonrigidMIL-W-5086/5 Wire, Polyvinyl Chloride Insulation, Polyvinyliedene Fluoride Jacket, Tin-Coated Copper Conductor, 600-Volt, 110CMIL-N-18307 Nomenclature and Identification for Electronic, Aeronautical and Aeronautical Support Equipment Including Ground Support EquipmentSTANDARDSFede
12、ralFED-STD-595 ColorsMilitaryMIL-STD-105 Sampling Procedures and Tables for Inspection by AttributesMIL-STD-129 Marking for Shipment and StorageMIL-STD-1186 Cushioning, Anchoring, Bracing, Blocking, and Waterproofing, with Appropriate Test MethodsMS25235 Lamp, Incandescent, Single-Contact Bayonet Ca
13、ndelabra Base, S-11 BulbMS35478 Lamp, Incandescent, S-8 Bulb, Single Contact, Bayonet Candelabra BaseCopyright SAE International Provided by IHS under license with SAENot for ResaleNo reproduction or networking permitted without license from IHS-,-,-SAE AS7768- 3 -2.1 (Continued):(Copies of specific
14、ations, standards, drawings, and publications required by contractors in connection with specific procurement functions should be obtained from the procuring activity or as directed by the contracting officer.)2.2 Other Publications:The following documents form a part of this specification to the ex
15、tent specified herein. Unless otherwise indicated, the issue in effect on date of invitation for bids or request for proposal shall apply.ASTM B117-64 Method of Salt Spray (Fog) Testing(Application for copies should be addressed to the American Society for Testing and Materials, 1916Race Street, Phi
16、ladelphia, PA 19103)3. REQUIREMENTS:3.1 First article:When specified (see 6.2), the contractor shall furnish sample units for first article inspection and approval (see 4.3.1 and 6.2.1).3.2 Materials:Materials shall conform to the applicable specifications, MS standards, and Figure 1 as specified he
17、rein. Materials that are not covered to applicable documents shall be of the best commercial quality and suitable for the purpose intended.3.2.1 Metals: Metals shall be of the corrosion-resisting type unless suitably protected to resist corrosion during normal service life.3.3 Design and constructio
18、n:The design of the light assembly shall be substantially in accordance with the applicable standard or Figure 1. The dimensions specified thereon shall be maintained to permit interchangeability.3.3.1 Lamp: The light assembly shall be designed to use MS35478-307, MS35478-307R,MS25235-311, or MS2523
19、5-R311. The MS35478-307 lamp shall be furnished by the manufacturer of the light assembly unless otherwise specified (see 6.2).3.3.2 Wiring: The light assembly shall be wired substantially as shown on the applicable standard or Figure 1, using two size 20 wires in accordance with MIL-W-5086/5. A len
20、gth of wire 2 feet 1 inch shall extend from the mounting flange. The wires shall be protected by type F, Grade A, form U tubing in accordance with MIL-I-631.Copyright SAE International Provided by IHS under license with SAENot for ResaleNo reproduction or networking permitted without license from IH
21、S-,-,-SAE AS7768- 4 -3.3.3 Insulation: The insulation of the transflux tubing shall be capable of withstanding without breakdown, 500 volts RMS alternating current.3.3.4 Base mounting: The base mounting shall be so designed that the clamping screw passes through the clamp on the long extension arm a
22、nd the ball on the base. The base shall be provided with an adjustment which will permit adjustment of the assembly in both the vertical and lateral positions on the base.3.3.5 Ball joints: The ball joints in the assembly shall be coated with a layer of colloidal graphite. The graphite may be applie
23、d to the balls by means of a baked plastic vehicle or other method which will securely hold it on the surface of the balls.3.3.6 Finish:3.3.6.1 The reflector surface shall be finished in high-grade white enamel.3.3.6.2 The light assembly, except the reflector surface, shall have a durable, dull-blac
24、k finish conforming to TT-E-527, color number 37038 of FED-STD-595.3.3.7 Weight: The weight of the light assembly shall not exceed 1.25 pounds.3.4 Operating conditions:The light assembly shall be designed and constructed for service under the following operating conditions.a. Temperature. Temperatur
25、e ranging from -55C (-67F) to 70C (158F).b. Humidity. Humidity ranging to 100 percent.c. Altitude. Pressure altitude ranging from sea level to 50,000 feet.d. Sand and dust. Exposure to airborne sand particles encountered on deserts.e. Salt spray. Exposure to atmosphere containing salt-laden moisture
26、.f. Vibration. Conditions of vibration incident to use in aircraft.3.5 Cold resistance:The light assembly shall not be damaged by exposure to temperatures of -65C (-85F).Copyright SAE International Provided by IHS under license with SAENot for ResaleNo reproduction or networking permitted without li
27、cense from IHS-,-,-SAE AS7768- 5 -3.6 Identification of Product:3.6.1 Nameplate: A nameplate conforming to MIL-N-18307, and containing the following information, properly and legibly filled in, shall be securely attached to the outer surface of the reflector:LIGH T, DESKMilitary Part No.Federal Stoc
28、k NumberManufacturers Part No.Contract or Order No.Manufacturers Name or TrademarkU.S. Property3.6.2 Use of MIL designations: MIL designations shall not be applied to a product, nor referred to in correspondence or sales matter, until notification has been received that the product has been approved
29、 for aeronautical use.3.7 Workmanship:Workmanship shall be in accordance with high-grade manufacturing practice. Particular attention shall be given to freedom from blemishes, defects, burrs, and sharp edges; accuracy of dimensions, and marking of parts; thoroughness of soldering, wiring and paintin
30、g; and alignment of parts and tightness of assembly screws and bolts.4. QUALITY ASSURANCE PROVISIONS:4.1 Responsibility for inspection:Unless otherwise specified in the contract or purchase order, the contractor is responsible for the performance of all inspection requirements as specified herein. E
31、xcept as otherwise specified in the contract or order, the contractor may use his own or any other facilities suitable for the performance of the inspection requirements specified herein, unless disapproved by the Government. The Government reserves the right to perform any of the inspections set fo
32、rth in the specification where such inspections are deemed necessary to assure supplies and services conform to prescribed requirements.4.2 Classification of inspection:The inspection requirements specified herein are classified as follows:a. First article inspection (see 4.3)b. Quality conformance
33、inspection (see 4.4)Copyright SAE International Provided by IHS under license with SAENot for ResaleNo reproduction or networking permitted without license from IHS-,-,-SAE AS7768- 6 -4.3 First article inspection:First article inspection shall be performed after award of the contract on light assemb
34、lies representative of the production lot. First article inspection shall consist of all inspection procedures of this specification (see 4.5).4.3.1 First article inspection samples: The contractor shall subject one complete light assembly, of each part number, to all the applicable tests of this sp
35、ecification as described under Test Methods, paragraph 4.5.4.4 Quality conformance inspection:The contractor shall furnish all samples and shall be responsible for accomplishing all the inspections. Quality conformance inspection shall be under the supervision of the government quality control repre
36、sentative. Acceptance or approval of material during the course of manufacture shall in no case be construed as a guarantee of the acceptance of the finished product. Quality conformance inspection shall consist of the following tests:a. Examination of product (see 4.4.1)b. Operational tests (see 4.
37、4.2)c. Examination of preparation for delivery (see 4.6)4.4.1 Examination of product: Sampling for examination of product shall be conducted in accordance with MIL-STD-105, Inspection Level II. Acceptance shall be based on an acceptable quality level (AQL) of 2.5 defects per hundred units (see 4.5.1
38、).4.4.2 Operational tests: Sampling for operational tests shall be conducted in accordance withMIL-STD-105, Inspection Level S-2. Acceptance shall be based on an acceptable quality level (AQL) of 1.5 defects per hundred units (see 4.5.2).4.5 Test methods:4.5.1 Examination of product: Each light asse
39、mbly shall be examined to determine conformance to the requirements of this specification with respect to material, dimensions, workmanship, marking, and other requirements not covered by tests.4.5.2 Operation: Each light assembly shall be tested for proper operation by applying the design voltage o
40、f the lamp to the conductors.4.5.3 Low temperature: The light assembly shall be subjected to a temperature of -65C (-85F) for a period of 48 hours. The temperature shall then be raised to -55C (-67F) for a period of 6 hours. While at this temperature, the light assembly shall be tested as specified
41、for operation. The light assembly shall operate properly. There shall be no damage which would affect subsequent operation.Copyright SAE International Provided by IHS under license with SAENot for ResaleNo reproduction or networking permitted without license from IHS-,-,-SAE AS7768- 7 -4.5.4 High te
42、mperature: The light assembly shall be subjected to a temperature of 70C (158F) for a period of 24 hours. The light assembly shall then be subjected to the test specified for operation. The light assembly shall operate properly. There shall be no damage which would affect subsequent operation.4.5.5
43、Vibration: The light assembly shall be mounted on a vibration stand and shall be subjected to vibration with simple harmonic motion having an amplitude of approximately 0.06 inch. (Amplitude is defined as a total movement measured from one extreme to the opposite extreme.) The vibration shall consis
44、t of cyclic operation from approximately 10 cycles to 55 cycles and back to 10cycles per second. The duration of 1 cycle of operation shall be approximately 1 minute. The light assembly shall be mounted horizontally and vibrated continuously in a longitudinal direction for a period of 3 hours. The t
45、est shall then be repeated with the axis of the vibration 90 degrees to the previous axis. No failure exclusive of the lamp shall occur as a result of this test. The light assembly shall be in a satisfactory operating condition at the end of the test and the assembly shall not droop or sag. The posi
46、tion of the reflector shall not be changed by more than 1/2 inch in any direction by the vibration.4.5.6 Sand and dust: The light assembly shall be mounted in any position and subjected to a sand spray for a period of 4 hours. The sand stream shall not impinge directly upon the light assembly and th
47、e flow of sand shall not exceed 2.5 pounds per hour. The sand used shall be 4 pounds of foundry molding sand or equivalent which passes through a 150-mesh screen. The ambient temperature in the chamber shall be maintained at 50 to 60C (122 to 140F). The light assembly shall be operating during the t
48、est. The light assembly shall operate satisfactorily for the duration of the test and thereafter.4.5.7 Altitude: The light assembly shall be placed in an altitude chamber maintained at a temperature of -65C (-85F) and the pressure reduced to simulate an altitude condition of 50,000 feet (3.436 inche
49、s of mercury absolute) for a period of 4 hours. There shall be no damage which would affect operation of the light assembly.4.5.8 Salt spray: The light assembly shall be subjected to 50 hours to continuous salt spray in accordance with ASTM B117-64. The light assembly shall be washed and air-dried after the test. It shall not show evidence of excessive corrosion, or failure of any
