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1 SUBJECT: APPROVED BY STATUS PURPOSE AFFECTED FUNCTIONS Assembly Procedures Manager, Hardware Engineering Maintenance Revision Defines the requirements for assembly techniques and procedures that cannot be categorized in other specific L-3 Communications Corporation, Division (hereafter referred to as Link) Manufacturing s. Establishes procedures for part exchanges (by Manufacturing) without formal authorization. Part exchanges for nonreparable parts specified within this instruction may be made without initiation of a Class I or Class II engineering change. This instruction shall be followed by personnel involved in assembly of Link designed equipment. Hardware Engineering Manufacturing REFERENCES LMS 11-3 Hand Soldering, Electrical LMS Electrical Bonding MIL-STD Grounding, Bonding and Shielding MIL-HDBK-505 Definitions of Item Levels, Item Exchangeability, Models, and Related Terms MIL-HDBK-419 Grounding Bonding and Shielding for Electronic Equipments and Facilities MIL-HDBK-454 General Guidelines for Electronic Equipment MIL-HDBK-1857 Grounding, Bonding and Shielding Design Practices MS3400 Connector, Receptacle, Electric, Wall Mounting, (existing design) Front Release, Crimp Contact, AN Type FSC 5935 SAE-AS34001 Connector, Receptacle, Electric, Wall Mounting, (new design) Front Release, Crimp Contact, AN Type FSC 5935 MS3452 Connector, Receptacle, Electrical, Box Mounting, Rear Release, Crimp Contact, AN Type MIL-STD-464 Electromagnetic Environmental Effects Requirements for Systems SAE-AS7928 Terminals, Lug and Splices, Conductors, Crimp Style of 27 Rev. BG

2 1. Requirements SAE-AS27212 MIL-T A-A Assembly procedures. Terminal Board Assembly, Molded-In Stud, Electric Training Devices, Military; General Specification for Terminal Boards, Molded, Barrier Screw and Stud Types and Associated Accessories a. Masking tape and electrical tape. The use of masking tape in equipment is permissible for such purposes as temporary identification of wires or other items of equipment during the test phase. Electrical tape may be used to provide temporary electrical insulation or protection of terminal ends of wires that are disconnected for testing, etc. Any masking or electrical tape used for the above purposes shall be removed and the equipment returned to an acceptable condition prior to customer acceptance. b. Wiring potentiometers (2 inch diameter and larger). Wire lead length shall be approximately 4 inches from the main trunk of the harness and shall be routed as shown in Figure 1. Figure 1 may be considered as a top, side, or bottom view, depending upon the orientation of the potentiometer terminals when mounted. Main trunk Trunk in middle alternate method. Main trunk Trunk on side preferred method. Figure 1 Wiring Potentiometers of 27 Rev. BG

3 c. Shims, shafts. Shafts with snap rings shall be shimmed at assembly to prevent undue axial motion due to tolerance buildup between ring grooves. Laminated shims may be selected from the following: Link PN (for 1/8 inch shaft) Link PN (for 3/16 inch shaft) Link PN (for 1/4 inch shaft) d. Solderless lugs. (1) Assembly arrangement of solderless lugs and their attaching hardware shall be as shown in the following paragraphs, unless otherwise specified on the engineering drawings. (a) Terminal strip connection (Figure 2). (b) Chassis ground connection, tapped mounting hole (Figure 3). NOTE: Mounting surface prepared in accordance with MIL-STD-464 LMS Electrical Bonding). (c) Chassis ground connection, untapped hole (Figure 4). NOTE: Mounting surface prepared in accordance with MIL-STD-464 (LMS Electrical Bonding). (d) Chassis ground connection, untapped hole - with secured mounting. During assembly and subsequent wiring of assemblies, it may be necessary to disassemble parts to gain access and mount lugged wires at E1 ground positions. To avoid this disassembly, an additional flat washer, lock washer, and nut may be used with the existing hardware (Figure 5). NOTE: Mounting surface prepared in accordance with MIL-STD-464 (LMS Electrical Bonding) of 27 Rev. BG

4 Terminal lug Terminal strip Stud WITHOUT STUD SHOULDER Lock washer Terminal lug Stud Terminal strip WITH STUD SHOULDER Stud shoulder Term lug Figure 2 Typical Terminal Strip Connection Screw or bolt Flat Washer Mounting surface (Plated steel, CRES steel) Term lug Screw or bolt (ALCLAD) Mounting surface (Aluminum) A. STEEL SURFACE B. ALUMINUM SURFACE Figure 3 Chassis Ground Connection (Tapped Hole) of 27 Rev. BG

5 Term lug Screw or bolt Term lug Screw or bolt Mounting surface (Plated steel, CRES steel) Mounting surface (Aluminum) A. STEEL SURFACE B. ALUMINUM SURFACE (ALCLAD) Figure 4 Chassis Ground Connection (Untapped Hole) Term lug Mounting surface (Plated steel, CRES steel) Stud Split lock washer Term lug Mounting surface (Aluminum) Stud Split lock washer Split lock washer Bolt or screw A. STEEL SURFACE (ALCLAD) Bolt or screw B. ALUMINUM SURFACE Figure 5 Chassis Ground Connection (Untapped Hole Secured Mounting) (e) Chassis ground connection, feed thru stud (Figure 6). NOTE: Mounting surface prepared in accordance with MIL-STD-464 (LMS Electrical Bonding). (f) (g) Bus bar, tapped mounting hole (Figure 7). For voltage and power return connections. Bus bar, untapped mounting hole (Figure 8). For voltage and power return connections of 27 Rev. BG

6 Stud Terminal lug Mounting surface (Plated steel, CRES steel) Term lug Figure 6 Chassis Ground Connection (Feed thru Stud) Screw or bolt Copper bus bar Term lug Screw or bolt (ALCLAD) Aluminum bus bar A. COPPER SURFACE B. ALUMINUM SURFACE Figure 7 Bus Bar Connection (Tapped Hole) of 27 Rev. BG

7 Term lug Copper bus bar A. COPPER SURFACE Term lug Aluminum bus bar Screw or bolt B. ALUMINUM SURFACE (ALCLAD) (ALCLAD) Screw or bolt Figure 8 Bus Bar Connection (Untapped Hole) (2) Unless otherwise specified by the Engineering drawing, the hardware supplied with the purchase material shall be used. e. Mounting nylon or plastic parts. When specified on the engineering drawing, a flat washer shall be used with a lock washer and nut to mount plastic or nylon parts, spacers, or connectors to prevent distortion or damage. When an existing engineering drawing does not specify a flat washer, Manufacturing shall utilize the hardware called out. (See Figure 9.) Mounting surface Stud Plastic or Nylon part Figure 9 Plastic or Nylon Part Mounting f. Terminal markers (mylar). (1) When mylar terminal markers are specified on the engineering drawing, the markers (Link PN ) shall be ink stamped with the appropriate terminal numbers as indicated on the assembly drawings. Numbers shall read as shown in Figure of 27 Rev. BG

8 Figure 10 Terminal Markers (2) Mylar terminal markers shall be assembled on the terminal strip studs prior to other components (Figure 11), and be secured with a flat washer and nut. Stud Terminal strip Terminal marker Figure 11 Terminal Marker Mounting g. Connecting cables to instruments and panels. Cables to instruments and removable or hinged panels, particularly in the simulator cockpit area, shall be installed and supported with sufficient slack immediately behind the instrument or panel to permit connection or disconnection of the cable connectors whenever the instruments or panels are removed from their normal mounted positions of 27 Rev. BG

9 h. Heat sink compound. (1) When mounting power transistors and diodes, apply a thin coating of heat sink compound similar to Link PN and Link PN to: (a) (b) (c) The base and mounting stud Both sides of the insulating washer (when used) Any surface of the transistor or diode that contacts the heat dissipater (2) The compound shall be applied directly from the tube and spread with an applicator, such as a stick. (3) This procedure is not limited to diodes and transistors. These compounds may also be used with other electronic components subject to the same design requirements. i. Sleeving applications. (1) Transparent sleeving. For soldered connections, transparent sleeving shall be used as an insulator over connector and component sockets. Alternate pin sleeving may be used at the discretion of Manufacturing. (See Figures 12 and 13.) Sleeve CONNECTOR Alternate pin sleeving shown for illustration purposes only Figure 12 Connector Sleeving of 27 Rev. BG

10 Exposed hot wire-sleeved Figure 13 Socket Sleeving (2) Teflon. Teflon sleeving shall be used as an insulator where soldering heat and soldering iron tip contact could damage other types of insulation and where bare wire jumpers might touch. (See Figures 14, 15, and 16.) Teflon sleeved wire Bare wire TERMINAL BOARD Figure 14 Typical Sleeving WAFER SWITCH Figure 15 Typical Sleeving on a Terminal Board on a Wafer Switch of 27 Rev. BG

11 Teflon sleeve COAXIAL CONNECTOR Figure 16 Typical Sleeving on a Coaxial Connector j. Helicoil inserts. Helicoil inserts should be installed 3/4 P to 1-1/2 P below the surface (P = thread pitch). k. Bus bar terminations. When a lugged lead identification does not indicate a specific bus bar terminal number, the lead may be attached to any convenient termination point of the correct size on the bus bar, provided no more than four leads are attached to any one terminal. l. Number of lugs per terminal. The maximum number of lugs to be connected to any one terminal on a terminal board shall be two for screw-type terminal boards covered by A-A-59125, and as specified in the detail specification sheets for stud-type terminal boards. Not more than four lugs shall be connected to any one terminal of a board covered by SAE-AS Accessories such as stud connectors, straddle plates, and jumper and terminal board lugs shall be counted as lugs for this purpose. m. Number of wires per terminal or lug (stranded wire only). The number of wires terminated in an individual terminal or lug shall not be greater than three. Multisection turret, bifurcated, or multi-hole lug terminals shall have not more than three wires per section, tong, or hole. In no case shall the total cross sectional area of the terminated wires exceed the cross sectional area capacity of the terminal or lug. Refer to Table I for circular mil area of common wire sizes. Use this table to determine lug size (see example) of 27 Rev. BG

12 Example: It is required to crimp two AWG 22 and one AWG 20 wires in one terminal lug. To determine the lug to be used: add the circular mil area of the one AWG 20 wire to the circular mil area of the two AWG 22 wires (one AWG 20) 1280 (two AWG 22) 2300 Total circular mil Using Table I, locate the next higher circular mil area in relation to the total circular mils required, in this case 2580 circular mil area in relation to the 2300 total circular mils required. Cross reference this circular mil area to the equivalent wire size, in this case AWG 16. Table I Circular MIL Area For Wire AWG CIRCULAR MIL AREA AWG CIRCULAR MIL AREA , , , ,600 n. Connector wiring (stranded wire only). Multiple conductors may terminate in a contact provided the sum of the cross sectional areas of the conductors does not exceed the maximum cross sectional area for which the contact is rated. Not more than one wire shall be routed through any hole in the grommet of an environmentally sealed connector. o. Lugged lead connections. When specific wiring connections are not defined as point to point (as in a schematic diagram), the number of lugged connections to a terminal shall not exceed the number of connections depicted on the schematic diagram. (See Figure 17.) of 27 Rev. BG

13 R1 R 2 R3 R4 R5 R Two lugged connections maximum at this assembly level One lugged connection maximum at this assembly level Figure 17 Typical Lugged Lead Connections p. Adding miscellaneous components/spot thru. Spot thru/hand-drilled holes specified on assembly-type drawings and expressed in decimal form without tolerance shall be governed by the drawing block tolerance unless otherwise specified. It is intended that these hand-drilled holes will accept the fasteners assigned to them, and shall not be drilled in such excess as to be detrimental to the fasteners locking device, e.g., lock washers. In that instance, Engineering shall be notified. 1.2 Hardware exchanges. The exchanges authorized by this instruction apply only to specific items and variations listed herein. The same basic item; type, material, finish, as specified on the Engineering drawing shall be used, the exchange being limited to such features as variations of length, size, diameter, and thickness. These exchanges meet the exchangeability of items definition of MIL-HDBK-505. a. Bolts, screws. Lengths. The length of screws and bolts installed with nuts should be such that the exposed portion of the screw or bolt is a minimum of 1-1/2 threads. The next longer or shorter screw or bolt may be exchanged for that specified on the drawing. b. s. s of different thickness and diameter of the same part number may be used provided these differences are within the tolerance bands dictated on the MS drawing of 27 Rev. BG

14 c. Transparent plastic tubing (insulation). The next two sizes, larger or smaller diameter, may be exchanged. d. Cotter pins. The next size, longer or shorter, may be exchanged. e. Rivets. The next standard length, longer or shorter, may be exchanged provided the exposed portion does not interfere with adjacent structures, parts, items, hardware, etc. When a shorter length is exchanged, care shall be exercised to insure the length is sufficient to head properly. f. Terminal lugs. (1) Stud size. The next larger or smaller stud size (hole diameter) may be exchanged, provided the possibility of no electrical shorting results. (2) Crimp barrel size. Due to wire braid variations, the next larger or smaller barrel size may be exchanged. g. Ferrules and heat shrinkable solder splices for shielded wire. The next size, larger or smaller, may be exchanged. h. Wire. (1) Wire of a higher voltage rating than that specified on the drawing may be used provided the conductor size (AWG), type (stranded, solid), and type of insulation (Teflon, for example) are the same as that specified, and the larger outside diameter of the insulation will have no adverse effect, such as overcrowding or poor fit in the equipment. (2) Wire of a lower voltage rating than that specified on the drawing may not be exchanged of 27 Rev. BG

15 (3) Jumper wires. (a) When solid, bare, tinned copper wire (used for jumper wires) is called out on the drawing or wire list, with insulation sleeving, it shall be permissible to exchange Teflon insulated, silver coated copper, solid wire of like gauge. The Teflon insulation shall be of 200 C extruded type. Part numbers for the Teflon insulated wire are: 20 AWG-M16878/4BGA9 22 AWG-M16878/4BFA9 24 AWG-M16878/4BEA9 (b) (c) When the drawing or wire list specifies short, insulated wire jumpers between terminals on components or adjacent components such as switches, relays, etc., it shall be permissible to exchange solid, bare bus wire of the same gauge covered with a section of an appropriate size of clear insulation. Length of the exchanged jumpers shall be limited to 2 inches. On occasion, very short lengths of insulated wire are specified as jumpers. Due to the extreme shortness of some of these jumpers, it is difficult to strip the wire without pulling off all the insulation. Every effort should be made to strip these short lengths of wire properly. In the event the insulation is pulled off accidentally, it shall be permissible to use the bare stripped wire, but only on the condition that the wire cannot come in contact with anything, thereby causing a malfunction. If this possibility does exist, a sufficient length of the stripped insulation shall be slipped on the wire to provide the necessary protection of 27 Rev. BG

16 1.3 Power supply jumpers. Power supplies as received from the vendor will normally have jumpers installed across the following terminal board terminals: -S (-sense) to -V (-voltage) +S (+sense) to +V (+voltage) These terminal jumpers are not to be removed from the terminal strip unless the wiring list or other next-assembly document specifies their removal. If the wiring list or engineering drawing specifies that a jumper wire be added across terminals which already have jumpers installed by the vendor, the vendor-installed jumpers may remain in place instead of adding the jumper wire specified on the engineering drawing or wiring list. 1.4 Pressure connector terminations. a. Cables/wires terminating in pressure connectors shall be limited to one cable or wire per barrel. Cables/wires shall not be tinned by Manufacturing. If the engineering drawing specifies a larger cable and a smaller wire both terminating in the same barrel, the smaller wire shall be pigtailed to the larger cable by means of a compression cable splice similar to that shown in Figure 18. (Heat-shrink tubing may be applied over the splice if additional support of the smaller wire is advisable.) Only the larger cable shall then terminate in the barrel of the pressure connector. On some types of components, such as power circuit breakers, screw-lug tabs are provided in addition to the pressure connectors. In this case, Manufacturing shall contact Engineering to specify a crimp-type terminal lug on the smaller wire(s) and attaching to the screw lug tab. (1) In those applications where the use of pressure connectors may not be desirable because of situations caused by part location, wire routing, wire versus connector size, etc., Manufacturing shall contact Engineering to specify deleting the pressure connector and terminate the wire with a crimp-type terminal lug of 27 Rev. BG

17 Barrel (opening) Pressure connector Compression cable splice (See Table II) Figure 18 Typical Pressure Connector (2) The wire shall be so inserted that the insulation is firmly against the barrel end or insulation support. Dimension A (Figure 19) shall be kept to a minimum. In no case shall the wire extend far enough to come into contact, or interfere, with the terminal mounting nut or screw head. The wire shall not be recessed into the lug. It shall be at least flush with the end of the barrel (surface B). Surface B Dimension A Figure 19 Typical Assembled Pressure Connector (3) When multiple barrel pressure connectors are used, and the barrels and cables/wires are of various sizes, the cables/wires shall be terminated in the smallest barrel into which the cable or wire can be inserted. (See Figure 20.) of 27 Rev. BG

18 Figure 20 Multiple-Barrel Pressure Connectors b. When specified on the engineering drawing, wires that are of a smaller gauge than that for which the pressure connector is intended shall be spliced to a short piece (2 to 6 inches) of the proper size wire or cable. The larger size wire or cable shall then be inserted into the pressure connector. For information on splices used for this situation, refer to Table II. Table II Pressure Connector Splices Circular Mil Area Range 509-3,260 2,050-5,180 5,180-13,100 13,100-20,800 20,800-33,100 33,100-52,600 52,600-83,700 83, , , , , , Wire Size (AWG) Length in Inches ( For circular mil areas of wire/ cables, see Table I.) HTI Part Number (Ref) NAS NAS NAS c. Saddle-type terminations. The terminations of various components such as circuit breakers, contactors, etc. shall be used as they were designed to of 27 Rev. BG

19 be terminated. For example: do not use a terminal lug if the termination was designed for a stripped lead, unless otherwise specified by the drawing and/or wiring list. If a saddle-type termination is used, it is permissible to insert two stranded wires of the same AWG size. (See Figure 21.) However, if one wire is solid (for example: a lead wire from a diode, capacitor, etc.) and of the same AWG size, make certain that both wires are secure. (See Figure 21.) Saddle-type termination Stripped wire 1 or 2 places One wire may be solid Figure 21 Typical Saddle-Type Termination d. Terminations other than saddle-type. The leads of components such as diodes, capacitors, etc., that are mounted across circuit breakers, contactors, etc., shall be terminated with a compression cable splice. (See Figure 22.) The part number of the appropriate splice shall be specified on the drawing. Component lead Cable Stripped wire Compression cable splice (See Table II) Figure 22 Typical Part Mounting Using a Compression Splice e. In those cases where the wire gauge is within the size range of the pressure connector, yet the connection is loose due to splaying of the of 27 Rev. BG

20 wire strands, the wire may be folded double before insertion into the connector. (See Figure 23.) Figure 23 Termination For Wire Doubled Over 1.5 Discrete component mounting. Leads of discrete components being mounted on equipment, such as a capacitor across the contacts of a relay, shall be kept to a minimum length in order to prevent interference with other components and reduce breakage due to flexing. Bend radii of the leads shall be two times the lead diameter, minimum. If practicable, lead length from the crimped lug or termination to the bend radius shall be a maximum of.50 inch. Lead length from the component to the bend radius shall be a minimum of.125 inch. (See Figure 24.).125 Min R= 2XD Min ( D= Lead Dia).50 Max.50 Max Figure 24 Discrete Component Mounting 1.6 Wire twisting requirements. Where twisted wire is called out on a drawing, the requirements of Table III shall be met of 27 Rev. BG

21 AWG & up Table III Minimum Twists Per Foot NUMBER OF CONDUCTORS Wiring/cable ducts. Where wiring or cable ducts (Panduit or equivalent) are fastened with a flat washer, lockwasher, and screw, apply a minimum length of 2.5 inches of fiberglass, Teflon-coated tape (Link PN ) over the head of the screw. 1.8 Series MS3400 (existing design) SAE-AS34001 (new design) connectors. a. The pins of some MS3400 and SAE-AS34001 series connectors have exposed pins which constitute an electrical shock and high-current hazard if not guarded by strain relief adapters or other means. Connectors used by Link which have this hazard are the MS3452-series connectors with contact sizes #8 or larger. Whenever these connectors are used, cover the exposed terminals with shrink tubing as delineated in the typical connector of Figure Conn shell Pin Insert(s) Pin, Contact Wire Exposed Terminal NOTE: ACTUAL CONNECTOR MAY NOT BE AS ILLUSTRATED Figure 25 Typical MS3400 and SAE-AS34001 Series Connector of 27 Rev. BG

22 b. MS3452-series connectors currently used by Link that require shock high current hazard prevention are listed below. MS3452L20-14p MS345L22-22sx MS3452L24022px MS3452L20-14s MS3452L22-22sy MS3452L24-22py MS3452L22-2p MS3452L24-10p MS3452L24-22p MS3452L22-2sw MS3452L24-10pw MS3452L24-22s MS3452L22-2sx MS3452L24-10pz MS3452L24-22sw MS3452L22-2sy MS3452L24-10s MS3452L24-22sx MS3452L22-22p MS3452L24-10sw MS3452L24-22sy MS3452L22-22px MS3452L24-10sz MS3452L32-17p MS3452L22-22s MS3452L24-22pw MS3452L32-17s 1.9 Pushbutton display. Figure 26 illustrates a typical component arrangement of a pushbutton display assembly. When reassembling, it should be noted that: a. Once the lamp(s) is inserted into the lamp board assembly, the base plate is discarded. b. Unless otherwise noted on the drawing, Manufacturing shall assume that the legend plate is always visible, as shown in Figure 26. The diffusers and legend plate may be in reverse order if the legend is not to be visible when the lamp is off, if so specified on the drawing. c. There will not be any legend plate in those cases where the legend is printed or engraved on the face plate. d. The lamp board assembly and the pushbutton housing are notched out in the upper left corner (Figure 26) to assure proper indexing of the components of 27 Rev. BG

23 Switch Housing Lever Latch - Release Lamp Base Plate (discard) Index Notch Lamp Board Assy Gasket Display Screen Divider Color Filter Face Plate Diffusers Legend Plate Index Notch Push button Housing Figure 26 Typical Pushbutton Display Assembly 1.10 Switch, oil-tight, illuminated, pushbutton. a. Align contact block terminals with light module terminals as shown in Figure 27. b. Install proper number of trim washers on switch to obtain minimum to maximum dimension. NOTE: Oil seal shown in Figures 27 and 28 must be in location (as shown) at all times. c. When using the style of legend plate shown in Figure 27, put the legend plate with indexing tab into corresponding panel slot. NOTE: Discard the locking thrust washer which is supplied with each switch. Thread the ring nut onto the switch and tighten of 27 Rev. BG

24 Contact Block Oil Seal Trim Washers.06 Min to.25 Max Panel thickness Legend Plate Guard Lens Locating Nib (On Operator) Light Module Ring.06 Min.12 Max Indexing Tab Legend Plate Legend Plate Figure 27 Oil-Tight Pushbutton Switch d. When using the style of legend plate shown in Figure 28, align the slot in the legend plate and the slot in the corresponding panel slot. Place the locking thrust washer with the indexing tab in place with the corresponding slots in the legend plate and panel. Thread the ring nut onto the switch and tighten. Contact Block(s) Oil Seal Trim Washers.06 Min to.25 Max Panel thickness Legend Plate or Thrust Washer Guard Locating Nib Lens (On Operator) Legend Plate Light Module Ring.06 Min.12 Max Indexing Tab On Locating Thrust Washer Figure 28 Oil-Tight Pushbutton Switch of 27 Rev. BG

25 1.11 Clip-on bus strips. a. When the engineering drawing shows clip-on bus strips for connector plates/backplanes, the bus strip may be installed as shown or inverted. (See Figure 29.) Standard Method Inverted Figure 29 Typical Clip-On Bus Strip b. This procedure applies to bus strips with Link PN through - 07 only. After installation of the strip, a solder fillet shall be applied at the top of the electrical connection made by the backplane pin and the bus strip. Refer to Requirement 5 of MIL-HDBK-454 for general soldering guidelines (LMS 11-3, hand soldering section). (See Figure 30.) Solder Fillet Before soldering After soldering Figure 30 Solder Fillet On Bus Strips of 27 Rev. BG

26 1.12 Miscellaneous wiring techniques. a. The engineering drawing may specify special wiring techniques on various types of assemblies (cabinet, chassis, panel, etc.). Two of these techniques are Direct Wiring and Wiring to be as short as possible. b. Direct Wiring (critical wire length) is point to point wiring routed via the shortest possible and most direct path. These wires are not to be routed or dressed with the main wire trunk and/or its branches. Except for strain relief, there will be no rework length allowance of wire. c. Wiring to be as short as possible is point to point wiring routed the shortest, most direct path via the main wire trunk and/or its branches. Except for strain relief, there will be no rework length allowance of wire Abrasion protection. Abrasion protection shall be provided on Link products as appropriate. When not specified on Link engineering drawings, Manufacturing shall apply abrasion protection in accordeance with the following. Manufacturing shall apply abrasion protective materials on wiring/cabling to protect against chafing due to movement. Flexible sleeving/tubing, Link PN through or equivalent, shall be applied on wiring/cabling subject to flexing in areas such as slide-out racks and drawers and in cases where flexing and abrasion cannot be avoided. Channel rubber strip, Link PN through or equivalent, shall be applied to sharp edges of hardware where wiring/cabling may come in contact with the hardware edges when flexible sleeving/tubing application to the wiring/cabling is not feasible. NOTE: Sleeving/tubing may be slid over or slit to fit the cabling/wiring and secured with lacing cord or tie straps of 27 Rev. BG

27 1.14 Slide Latch Kits. When connector slide latch kits are used on panels, up to and including 16 th inch thick, in the vertical position, install all the sliding latches as shown in Figure 31, so that the lock position is obtained by sliding the latch downward. 2. Quality Assurance Requirements Figure 31 Connector Sliding Latch Kit Installation 2.1 The Quality Assurance Organization shall be responsible for insuring that the requirements of this instruction are met, and that the hardware exchange limitations specified herein are not exceeded. 3. Preparation For Delivery (Not Applicable) 4. Notes 4.1 This instruction supersedes Binghamton Standard Shop Practices and 7.7; APO Standard Engineering Practice PA-M Parenthetical identities are for reference only of 27 Rev. BG