1、 - MIL-L-26764B 4 March i970 SUPERSEDING 11 December i963 MIL- I-,-267 6 4A ( AS G ) MILITARY SPECIFICATION LIGHT, MARKER, AIRPORT APPROACH, HIGH INTENSITY, TYPE MB-2 This specification has been approved by the Department of the I Air Force and by the Naval Air Systems Command. 1. SCOPE 1.1 This spe
2、cification covers one type of high intensity, airport approach, marker light, designated Type MB-2. 2. APPLICABLE - .“ DOC-WNTS . _- 12.1 The following documents, of the issue in effect on date of invitation for bids or request for proposal, form a part of this specification to the extent specified
3、herein: SPECIFICATIONS I I Federal QQ- Z- 32 5 PPP-B- 6 O1 PPP-3-636 PPP- C- 84 3 Military 1p-116 MIL-C-5136 I MIL- C-79 89 MIEP-17667 MIL-C-25050 STANDARDS . Federal 59 5 /Y- 5. Zinc Coating, Electrodeposited, Requirements for Boxes, Wood, Cleated-Plvood Box , Fiberboard Cushioning Material, Cellul
4、osic Preservation, Methods of Cable , Power , Electrical , Polychloroprene Sheathed , Buna Compound Insulated Covers, Light-Transmitting, for Aeronautical Lights, General Specification for Paper, Wrapping, Chemically Neutral (Non-Corrosive) Colors, Aeronautical Lights and Lighting Equipment, General
5、 Requirements for Colors FSC 6210 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-L-26764B 62 MIL-L-26764B Mil it ary W 0b 0305723 O W MIL-STD-100 Eng-neering Drawing Pract MIL-STD-129 MIL-STD-130 MIL-STD-143 MIL-STD-831 MIL-STD-889 MS24348 E2448
6、9 .ces Sampling Procedures and Tables for Inspection by Attributes Marking for Shipment and Storage Identification Marking of U. S. Military Property Standards and Specifications, Order of Precedence for the Selection of Test Reports, Preparation of Dissimilar Metals Lamp, Incandescent, PAR-56 Bulb,
7、 Airport Approach Filter, Marker Light, Airport Approach, Glass (Copies of specifications, standards, drawings, and publications required by suppliers in connection with specific procurement functions should be obtained from the procuring activity or as directed by the contracting officer.) “2.2- Ot
8、her publications. The following documents form apart of this specifi- cation to the extent specified herein. Unless otherwise indicated, the issue in effect on date of invitation for bids or request for proposal shall apply: Federal Aviation Agency Specifications L-823 FAA-9 82 Drawings D- 4761-1 D-
9、 4761-2 D- 4761-3 Plug and Receptacle Cable Connectors PAR- Lampholder PAR- Lamp Holder, General Assembly PAR- Lamp Holder, Parts Details PAR- Lamp Holder, Parts Details (Copies of FAA documents may be obtained from the Federal Aviation Agency, Washington, D. C. 20590.) 3. REQUIREMENTS *3.1 Preprodu
10、ction. This specification makes provisions for preproduction testing . 3.2 Selection of specifications and standards. Specifications and standards for necessary commodities and services not specified herein shall be selected in accordance with MIL-STD-143. 2 i, Provided by IHSNot for ResaleNo reprod
11、uction or networking permitted without license from IHS-,-,-MIL-L-26764B 3.2.1 Use of commercial parts. Bolts, nuts, washers, cotter pins, lock rings and similar fastening devices used for assembly, may be selected from commercial sources, provided military or other standard parts are not speci- fie
12、d by this specification or associated standards. parts are used, they shall possess suitable properties and shall be replace- able by military standard parts without alteration, and provided the corre- sponding military standard part nunibers are referenced in the parts list and, if practicable, on
13、the contractors drawings. 3.3 Materials 3.3.1 Fungus-proof materials. Materials that are nutrients for fungi shall not be used where it is practicable to avoid them. When used and not her- metically sealed, they shall be treated with a fungicidal agent acceptable to the procuring activity. sealed en
14、closure, fungicidal treatment will not be necessary. If such commercial I However, if they will be used in a hermetically *3.3.2 Metals. Metals shall be of the corrosion-resistant type or treated to resist corrosion caused by fuels, salt spray , or atmospheric conditions as may be encountered in sto
15、rage or normal service. metals shall be avoided whenever practicable. Dissimilar metals are defined in MIL-STD-889. The use of dissmilar 3.3.3 Bolts , screws , and nuts shall be of corrosion- resistant metal or shall be treated to prevent corrosion or seizing which would Bolts , screws , and nuts. -
16、 cause difficulty in removal for servicing and maintenance. 3.4 Design and construction. accordance with Drawings D-4761-1, D-4761-2, D-4761-3, and FAA-982, with the exceptions and additions specified herein. 3.4.1 Optional design. Slightly different details of design other than those specifiedmay b
17、e permitted, provided the difference does not affect the per- formance or interchangeability of the lights, and provided the design change . is approved by the procuring activity. 3.4.2 Design conditions. door operation under all weather conditions. It shall be so designed and con- structed that no
18、parts will work loose in service. It shall be constructed to withstand the strains, jars, vibrations and other conditions incident to ship- ping, storage, installation, and service. 3.4.3 Adjustment and repairs. The light shall be so constructed that adjust- ments and repairs can be easily made by p
19、ersonnel of operating units and over- haul bases without the use of special tools. a The light shall be designed and constructed in The light shall be designed for continuous out- 3 h Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-L-26764B 62 =
20、7777706 0305725 4 . . - - . . MILL-26764 ._ 3.5 Performance 3.5.1 Assembly. perly assembled and shall conform to the design and construction specified. When tested as specified in 4.5.2, the light shall be pro- 3.5.2 Operation. or other damage to any component when tested as specified in 4.5.3. Ther
21、e shall be no evidence of smoking, charring, softening 3.5.3 Lamp position. light shall correspond to the markings ori the protractor scale. When tested as specified in 4.5.4, the aiming of the 3.6 Components. housing shell, ring, support and holder, terminal block, clips, connectors, and cord. The
22、major components of the light shall consist of the 3.6-.1 20-amp, two-contact, mogul end-prong base, sealed beam lamp in accordance with MS24348. There shall be approximately 1-inch space between the lamp and the . filter. Unless otherwise specified, lamps shall not be furnished with the light (see
23、.2). Lamp. -The light shall be“designed for use with a PAR-56, 500-watt, 3.6.1.1 Lamp-holding clips. -At least three 18-8 stainless steel pressure clips shall be provided to hold the lamp to the index ring. be in accordance with Drawing D-4761-3. They shall be so constructed that they will not cut i
24、nto the lamp and will permit the lamp to be readily clipped and held in place. The clips shall Screws, nuts, and washersshall be furnished with the clips. *3.6.2 Filters. The filters shall be in accordance with MIL-C-7989 and MS24489 and shall be capable of being mounted as specified in FAA-982. spe
25、cified, the light shall not be provided with a filter (see 6.2). Unless otherwise *3.6.2.1 Filter color. When filters are required, they shall be provided in aviation colors specified, conforming to type I of MIL-C-25050 and grade in accordance with MS24489 (see 6.2). 3.6.2.2. Filter clips and screw
26、s. shall be supplied with the light. The clips and screws for holding the filter 3.6.3 Mounting hardware. assembly of the adjustable mount and for connecting it to the shell shall be of 18-8 stainless steel. mount shown on Drawing D-4761-1 shall have a round point to permit adjust- ment of the light
27、. The screws, nuts, bolts, washers, etc., used for One setscrew 3/8-16 by 3/4 inch used in the 3.6.4 Cord. A two-conductor No. 12 AWG, type SJO rubber or synthetic rubber cord, or a cord conforming to MIL-C-5136 shall be connected to the terminal 4 Provided by IHSNot for ResaleNo reproduction or net
28、working permitted without license from IHS-,-,-MIL-L-26764B 62 779970b 0105726 6 MIL-L-26764B block of each light. Thelength of the cord with plug shall be 72 +2 inches. The cord shall be threaded through the mounting support so that thecord and its connector are inside the mounting cuppxt. 3.6.4.1
29、Cord plug. with type Ia of L-823 and shall be molded to the lower end of the cord. The plug shall be two pole, Goov, 20 amp in accordance 3.6.5 Squeeze connectors. The squeeze connectorsLChal1 be in accordance with, or equal to, the connector spe.cified on Drawing D4761-i. Each con- nector shall be
30、cpmplete with aluminum or steel locknut. If steel locknut is furnished, it shall be zinc plated 0.0005 inch thick in accordance with type 1I;class 2 of QQ-2-325. .-_ - -. 3.6.6 Terminal block. requirements specified in FAA-982. The terminal block shall conform to the terminal block *3.7 facturers pa
31、rt number shall be.functionally and dimensionally interchangeable. The item identification and part number requirements of MIL-STD-100 shall govern the manufacturers part numbers and changes thereto. Part numbering of interchangeable parts. All parts having the same manu- 3.8 Finish. All aluminum pa
32、rts, except the inside of the support, shall be finished with one base coat and one finish coat of orange paint, color 12197, conforming to Standard 595. All paints and finishes used in the light shall be suitable for the operating temperatures involved and shall not cause parts of the assembly to a
33、dhere to each other. 3.9 Identification of product. Equipment, assemblies, and parts shall be marked for identification in accordance with MIL-STD-130. 3.10 Workmanship. The light, including all parts and accessories, shall be fabricated and finished in a thoroughly workmanlike manner. Particular at
34、len- tion shall be given to freedom from b1,emishes and defects, marking of parts and assemblies , thoroughness of soldering , cementing , welding , brazing , painting , wiring, and riveting, alignment of parts, and tightness of assembled screws and nuts. 3.11 Cleaning. The light shall be thoroughly
35、 cleaned, and loose, spattered or excess solder, metal chips, and other foreign material removed during and after final assembly. 4. QUALITY ASSURANCE PROVISIONS *4.i Responsibility for inspection. Unless otherwise specified in the contract or purchase order, the supplier is responsible for the perf
36、ormance of all inspection requirements as specified herein. Except as otherwise specified in 5 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-L-267hLIB 62 7779906 0305727 m MIL-L-26764B the contract or order, the supplier may use his own or any
37、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 forth in the specification where such inspections are deemed necessary to assure supplies and s
38、ervices conform to prescribed requirements. 4.2 Classification of tests. be classified as follows: The inspection and testing of the light shall *a. b. Preproduction testing . See 4.3 Quality conformance tests See 4.4 *4.3 Preproduction testing (see 6.2) *4.3.1 Test sample. The test sample shall con
39、sist of one light, one lamp, and one filter representative of the production equipment. *4.3.2 Test report. After completion of the preproduction tests, a test report shall be prepared in accordance with MIL-STD-831 and three complete copies of the report furnished to the procuring activity. “4.3.3
40、Preproduction tests. The preproduction tests shall consist of all tests described under 4.5. 4.4 Quality conformance tests. ing, a lot shall consist of all lights submitted for acceptance at one time. QuaLity conformance tests shall consist of group I and II tests. For the purpose of quality conform
41、ance test- 4.4.1 Group I tests. accordance with MIL-STD-105, inspection level II. The AQL shall be 1.0. This test shall consist of the examination of product as specified in 4.5.1. 4.4.2 Group II tests. accordance with MIL-STD-105, inspection level S-3. The AQL shall be 1.0. These tests shall consis
42、t of the assembly test (4.5.2) and the operation test Sampling for group I testing shall be conducted in Sampling for group II testing shall be conducted in (4.5.3). I 4.5 Test methods. 4.5.1 Examination of product. formance to this specification with respect to materials , workmanship, and marking
43、(see 3.3, 3.9, and 3.10). Each light shall be examined to determine con- 6 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-L-2676LIB 62 = 7797706 0105728 T MIL-L- 267 64B 4.5.2 Assembly. to determine that the design and construction is satisfacto
44、ry. When assem- bled, there shall be approximately a 1-inch space between the lamp and the filter. The light shall be tested with the specified lamp and filter *4.5.3 Operation. The light shall be operated for 24 hours at room temper- ature (approximately 25OC) positioned so the beam is approximatel
45、y horizontal. It shall be equipped with a 20-amp 500-watt lamp and green filter properly installed. period. 4.5.4 Lamp position. tested to ascertain that the lamp and filter which will be used are correctly positioned and aimed. The protractor scale on the light shall be checked to determine that th
46、e aiming of the light is as indicated on the scale. Twenty amperes shall be supplied to the lamp for the 24-hour test The light, complete with lamp and filter, shall be *4.6 Inspection of preparation for delivery. The preservation, packaging, packing, and marking shall be inspected to determine conf
47、ormance to the requirements of section 5 herein. 5. PREPARATION FOR DELIVERY 5.1 Packaging. 5.1.1 Level A. The lights shall be individually packaged method III of MIL-P-116. Each light shall be wrapped with material conforming to MIL- P-17667, or equal, cushioned with material meeting the requiremen
48、ts of PPP- C-843, and placed in a fiberboard unit container conforming to PPP-B-636, Packaging shall be level A or C, as specified (see 6.2). - 5.1.2 Level C. The lights shall be packaged in a manner which will afford adequate protection against deterioration and physical damage during shipment from
49、 supply source to the first receiving activity for immediate use. This level may conform to the suppliers commercial practice when such meets the requirements of this level. 5.2 Packing. Packing shall be level A, B, or C, as specified (see 6.2). 5.2.1 Level A. The lights packaged as specified in 5.1 shall be packed in . wood cleated-plywood shipping containers conforming to PPP-B-601, overseas type. Insofar as practicable, shipping
