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9/8/98 AC 43.13-1B cables up to and including 3/8 inch diameter. The use of sleeves that are fabricated of mate rials other than copper will require engineering approval for the specific application by the FAA. (1) Before undertaking a nicopress splice, determine the proper tool and sleeve for the cable to be used. Refer to table 7-6 and ta ble 7-7 for details on sleeves, tools, and the number of presses required for the various sizes of aircraft cable. The tool must be in good working condition and properly adjusted to ensure a satisfactory splice. (2) To compress a sleeve, have it well- centered in the tool groove with the major axis of the sleeve at right angles to the tool. If the sleeve appears to be out of line after the press is started, open the tool, re-center the sleeve, and complete the press. c. Thimble-Eye Splice. Before under taking a thimble-eye splice, initially position the cable so the end will extend slightly be yond the sleeve, as the sleeve will elongate somewhat when it is compressed. If the cable end is inside the sleeve, the splice may not hold the full strength of the cable. It is desir able that the oval sleeve be placed in close proximity to the thimble points, so that when compressed, the sleeve will contact the thimble as shown in figure 7-14. The sharp ends of the thimble may be cut off before being used; however, make certain the thimble is firmly secured in the cable loop after the splice has been completed. When using a sleeve requir ing three compressions, make the center com pression first, the compression next to the thimble second, and the one farthest from the thimble last. d. Lap Splice. Lap or running splices may also be made with copper oval sleeves. When making such splices, it is usually neces sary to use two sleeves to develop the full FIGURE 7-14. Typical thimble-eye splice. strength of the cable. The sleeves should be positioned as shown in figure 7-12(b), and the compressions made in the order shown. As in the case of eye splices, it is desirable to have the cable ends extend beyond the sleeves suffi ciently to allow for the increased length of the compressed sleeves. e. Stop Sleeves. Stop sleeves may be used for special cable end and intermediate fittings. They are installed in the same manner as nico press oval sleeves. NOTE: All stop sleeves are plain cop- per. Certain sizes are colored for iden- tification. f. Terminal Gauge. To make a satisfac tory copper sleeve installation, it is important that the amount of sleeve pressure be kept uni form. The completed sleeves should be checked periodically with the proper gauge. Hold the gauge so that it contacts the major axis of the sleeve. The compressed portion at the center of the sleeve should enter the gauge opening with very little clearance, as shown in figure 7-15. If it does not, the tool must be adjusted accordingly. g. Other Applications. The preceding in formation regarding copper oval sleeves and stop sleeves is based on tests made with flexi ble aircraft cable. The sleeves may also be Par 7-148 Page 7-33PDF Image | AFS-640
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