1、MIL-E-5LlOOT GD W 7977906 0223558 7 W “ MIL-E-5400T 1679 SUPERSEDING MIL-E-5400R 31 October 1975 Supersession data (see 6.8) MILITARY SPECIFICATION ELECTRONIC EQUIPMENT, AIRBORNE, GENERAL SPECIFICATION FOR This specification is approved for use by all Departments and Agencies of the Depart- ment of
2、Defense. 1. SCOPE 1.1 Scope. This specification covers the general re- quirements for airborne electronic equipment for operation primarily in piloted aircraft. The detail performance and test requirements for a particular equipment shall be as specified in the detail specification for that equipmen
3、t. 1.2 Classification. The electronic equipment for which -the general requirements for design and manufacture are outlined shall be of the following classes, as specified (see 6.2): Class 1 - Equipment designed for 50,000 ft. altitude and continuous sea level operation over the temperature range of
4、 -54O to +55OC (+7loC intermittent operation). Class 1A - Equipment designed for 30,000 ft. altitude and continuous sea level operation over the temperature range of -54O to +55OC (+7loC intermittent Operation). Class 1B - Equipment designed for 15,000 ft. altitude and continuous sea level operation
5、 over the temperature range of -4OO to +55OC (+7loC intermittent operation). Beneficial comments (recommendations, additions, deletions) and any pertinent data which may be of use in improving this document should be addressed to Commanding Officer, Naval Air Engineering Center, Engineering Specific
6、ations and Standards Department (Code 9313), Lakehurst, NJ 08733 by using the self-addressed Standardization Document Improvement Proposal (DD Form 1426) appearing at the end of this document or by letter. Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-
7、,-,-flIL-E-5qOOT GD 777770b 0223557 O W MIL-E-5400T Class 2 - Equipment designed for 70,000 ft.altitude and continuous sea level operation over the temperature range of -54O to +7loC (+95OC intermittent operation). Class 3 - Equipment designed for 100,000 ft. alti- tude and continuous sea level oper
8、ation over the temperature range of -54 to +95OC (+125OC intermittent operation). Class 4 - Equipment designed for 100,000 ft. alti- tude and continuous sea level operation over the temperature range of -54O to +125OC (+15OoC intermittent operation). 1.2.1 External cooling. The addition of the lette
9、r “X“ after the class number, e.g. (Class ZX), will identify the equipment as operating in the ambient environment of that class, but requiring cooling, from a source external to the equipment. 2. APPLICABLE DOCUMENTS * 2.1 Issues of-documents. The documents listed in Appendix A of the issue in effe
10、ct on the date of invitation for bids or request for proposals, form a part of this specification to the extent specified herein. Requirements of MIL-STD-454 invoked by this specification are limited to those documents appearing in Appendix A. DOCUMENTS See Appendix A (Copies of specifications, stan
11、dards, drawings, and publications re- quired by contractors in connection with specific procurement functions . should be obtained from the procuring activity or as directed by the con- tracting officer, ) 3. REQUIREMENTS * 3.1 Parts, materials and processes. Parts, materials, and processes shall co
12、nform to applicable documents listed in Appendix A. * 3.1.1 Selection of parts and materials. Parts and materials covered by documents listed in Appendix A are standard and shall be used whenever they are suitable for the purpose. Parts and materials shall be procured from QPL sources when qualifica
13、tion is a requirement of the part or material specification. Nonstandard parts and materials must be equiv- alent to or better than similar standard parts and materials. Parts se- lection and control shall be in accordance with MIL-STD-454, Requirement 2 Provided by IHSNot for ResaleNo reproduction
14、or networking permitted without license from IHS-,-,-22. When Appendix A fails to provide an applicable material specification or standard, the contractor shall use other-established specifications or standards in the order of precedence set forth in MIL-STD-143. Materials selected from other than A
15、ppendix A are not standard, and approval must be obtained prior to thefr use in equipment, Each vendor source for a non- standard part or material, requires approval. 3.1.1.1 Approval of nonstandard parts and materials. In con- sidering the approval of nonstandard parts and materials, contracts for
16、electronic equipment are divided into the following categories: Category I: Contracts which are fundamentally for the purpose of investigation or study and not for the fabrication of equipment. Category II: Contracts for one or more models of equipment designed to meet the perfor- mance requirements
17、 of a specification or to establish technical requirements for production equipment. This category includes contracts for models to be used for test under service conditions for the evaluation of their suitability and performance. Category III: Contracts for production .equipment. These contracts wi
18、ll usually include require- ments for a prototype or- preproduction model. 3i1.1.1.1 Contracts under Category I. Approval of nonstandard parts and materials shall not be required under contracts or orders which fall under Category I. * 3.1.1.1.2 Contracts for equipment which fall under Categories II
19、 and III. A request for the approval of the use of nonstandard parts and materials, except for metals, shall be submitted in accordance with appli- cable paragraphs herein. For a single contract covering like equipments which fall in both Categories II and III, parts and materials approval shall be
20、required only for those items used in Category II equipments, and any new item sources or new nonstandard items used in Category III equipments. Approval of all nonstandard parts and materials used in the equipment shall be obtained by the contractor prior to delivery of any equipment required by th
21、e contract. * 3.1.1.1.3 Reordered production equipment. A design review directed toward replacement of nonstandard parts and materials with standard parts and materials shall be performed on contracts for reordered equipment, whether reordered from the original contractor or from a different contrac
22、tor. Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-E-5400T Changes must cohform to interchangeability requirements. The original part procured from the same source, when required by interchangeability or lack of a etandard replacement part, may
23、 be used without reapproval. 3.1.1.1.3.1 Continuation of production. In those cases wherein the reordered production equipment represents continuous production by the same contractor, a review directed toward nonstandard parts replacement with standard parts shall not be required. * 3.1.1.1.4 Time s
24、chedule of material approval requests. The request for approval of nonstandard materials shall be made at the time that the material is selected for use in the equipment. The Government retains the right to request changes to the material, if the performance, description, test data, or inspection of
25、 the material indicates that the material will not perform its intended function. rt 3.1.1.1.5 Samples required for parts and material approvals. Samples of nonstandard parts and materials may be required by the procuring activity. These samples shall be submitted in quantities and to the destina- t
26、ion specified by the procuring activity for tests and examination. Sample quantities to be specified will not exceed 1 ounce or 6 square inches of any material or 3 feet of wire or 3 units of any other part, except transform- ers, microcircuits, delay lines, blowers, and power tubes such as magnetro
27、ns and klystrons, where 1 unit is sufficient. Sample parts and materials may be tested to destruction by the procuring activity and will not be returned to the contractor. When there is more than one supplier for a part or material, parts or materials from each supplier shall be considered for separ
28、ate submission. 3.1.1.2 Use of military part identifiers. Parts which require QPL approval, but which have no qualified vendors, shall not be identified with military part numbers. 3.1.1.3 Choice of parts and materials. Whenever an applicable specification provides more than one characteristic or to
29、lerance for an item, the equipment manufacturer shall use in the equipment, items of broadest characteristics and of the greatest allowable tolerances that will fulEill the performance requirements of the equipment. When acceptable items of higher than minimum quality are readily available, the util
30、ization of which would not increase the initial or life cycle cost to the procuring activity, they may be used. When maximum physical dimensions of an tem are indicated in the applicable specification for the item, all new equipment shall be designed to accommodate the maximum physical size specifie
31、d in order that all parts having the same type designation will be physically interchangeable in the equipment, 3.1.1.4 Replaceability by standard parts and materials. When- ever permission is granted by the procuring activity for a contractor to use items not in accordance with standard specificati
32、ons or which approved 4 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-* products exist, only because of nonavailability of standard items, the contractor shall arrange the equipment to permit replacement in the field of the nonstandard by the stand
33、ard items. The standard item shall be listed in the technical manuals as the preferred replacement. 3.1.1.5 Equipment performance. The requirements of this speci- fication with regard to the use of parts, materials, and processes, either standard or approved nonstandard, shall not relieve the contra
34、ctor of the responsibility for complying with all equipment performance and other re- quirements set forth in the detail equipment specification or contract. Approvals for nonstandard parts and materials are contingent on subsequent satisfactory performance during preproduction and quality conforman
35、ce tests and other required equipment tests. 3.1.1.6 Substitution of parts. The selection and application of substitute parts shall be in accordance with MIL-STD-454, Requirement 72. 3.1.2 Capacitors. Capacitors shall be in accordance with MIL-STD-454, Requirement 2. 3.1.3 Metal castings. Metal cast
36、ings shall be in accordance with MIL-STD-454, Requirement 21. 3.1.4 Electrical connectors. Electrical connectors shall be in accordance with MIL-STD-454, Requirement 10. 3.1.4.1 Mounting of electric receptacles. Where practical, when receptacles are mounted on a vertical surface the largest polarizi
37、ng- or prime key or keyway of the receptacle shall be at the top center of the shell of the receptacle. 3.1.4.2 Adjacent locations. The use of identical connectors in adjacent locations shall be avoided. When the use of connectors of the same shell size- in adjacent locations cannot be avoided, diff
38、erences in keying arrangement shall be used to prevent mismating. 3.1.5 Controls, Controls shall be in accordance with MIL- STD-454, Requirement 28. 3.1.5.1 Deleted. 3.1.5.2 Tuning dials. Tuning dials shaIl be irr accordance with MIL-STD-454, Requirement 42. 3.1.5.3 Control panels. Control panels sh
39、all conform to MIL-C- 6781. The design shall be approved by the procuring activity prior to fabrication. This design approval applies to panel layout only and does not authorize use of nonstandard parts on the panel. 5 Provided by IHSNot for ResaleNo reproduction or networking permitted without lice
40、nse from IHS-,-,-MIL-E-5LlOOT GD 799770b O223563 2 W MIL-E-5400T 3.1.5.4 Ranges of adjustable components. The electronic cir- cuitry shall be designed to provide a reserve in the adjustment range from the normal adjustment setting of all variable components that require adjustment during operation o
41、r maintenance. This adjustment range shall be sufficient to compensate for composite variations which may develop in the associated circuitry because of normal changes in part values during the specified life cycle of the equipment. The adjustment range shall also be capable of compensating for vari
42、ations resulting from replacement with parts within the tolerances specified. 3.1.6 Corrosion resistance. Materials shall be of corrosion- resistant types or shall be processed to resist corrosion. 3.1.6.1 Materials. Gold, nickel, chromium, rhodium, tin, lead- tin alloys, or sufficiently thick plati
43、ngs of these metals, are satisfactory without additional protection or treatment other than buffing or cleaning. 3.1.6.2 Ferrous alloys. Ferrous alloys shall be in accordance with NIL-STD-454, Requirement 15. 31.6.3 Aluminum alloy. 3.1.6.3.1 Surface, general. Parts fabricated from aluminum 1100, all
44、oys 3003, 5052, 6053, 6061, 6063, or 7072 shall be cleaned with a de- oxidizing solution, other than an uninhibited caustic dip, and may be used with or without other surface treatment. Other aluminum alloys shall be anodized in accordance with MIL-A-8625 or be given a chemical treatment in accordan
45、ce with MIL-C-5541. 3.1.6.3.2 Surfaces, bonded and grounded. Where bonding or ground- ing is necessary, aluminum 1100, alloys 3003, 5052, 6053, 6061, 6063, 7072, or equally corrosion-resistant alloys, shall be used. They may be used without other surface treatment. 3.1.6.3.3 Aluminum surfaces, extre
46、me wear resistant. Where bonding or grounding is not necessary, hard anodic finishes conforming to numbers E514, E515, or E516 of MIL-F-14072 may be applied to obtain extreme wear-resistant surfaces under Type 11 (MIL-F-14072) exposure on desired areas sf aluminum alloys not subject to repeated high
47、 tensile stresses. * 3.1.6.4 Cadmium-plating. Cadmium plating shall be in accordance with MIL-STD-454, Requirement 15. 3.1.6.5 Magnesium and magnesium alloys. Magnesium and magnesium alloys shall not be used except when approved or specified by the procuring activity. The request for use of magnesiu
48、m and its alloys should include the total environment exposure, the weight reduction and other advantages achieved, the proposed surface treatment, and the application details. 6 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-E-5400T 3.1.6.6 Zin
49、c and zinc-plated parts. Zinc and zinc-plated parts shall be given a dichromate treatment in accordance with QQ-2-325, Type II, Class 2. 3.1.7 . Dissimilar metals. Selection and protection of dissimilar metal combinations shall be in accordance with MIL-STD-454, Requirement 16. 3.1.8 Finishes. Unless contained in a hermetically sealed unit, part finishes (including hardware items of equipment not covered by subsidiary specifications) shall be resistant to corrosion.
