AFS-640

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AFS-640 ( afs-640 )

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AC 43.13-1B CHG 1 9/27/01 c. All associated electrically operated equipment and systems on the airplane must be on and operating before conducting inter- ference tests, unless otherwise specified. d. The effects on interference must be evaluated as follows: (1) The equipment shall not be the source of harmful conducted or radiated inter- ference or adversely affect other equipment or systems installed in the airplane. (2) With the equipment energized on the ground, individually operate other electri- cally operated equipment and systems on the airplane to determine that no significant con- ducted or radiated interference exists. Evalu- ate all reasonable combinations of control set- tings and operating modes. Operate communi- cation and navigation equipment on at least one low, high and mid-band frequency. Make note of systems or modes of operation that should also be evaluated during flight. (3) For airplane equipment and systems that can be checked only in flight, determine that no operationally significant conducted or radiated interference exists. Evaluate all rea- sonable combinations of control settings and operating modes. Operate communications and navigation equipment on at least one low, high and mid-band frequency. NOTE: Electromagnetic compatibil- ity problems which develop after in- stallation of this equipment may result from such factors as design charac- teristics of previously installed systems or equipment, and the physical in- stallation itself. It is not intended that the equipment manufacturer should design for all installation environ- ments. The installing facility will be responsible for resolving any incom- patibility between this equipment and previously installed equipment in the airplane. The various factors con- tributing to the incompatibility should be considered. NOTE: Ground EMI test have consis- tently been found adequate for fol- low-on approvals of like or identical equipment types, irrespective of the airplane model used for the initial ap- proval. Radio frequency transmission devices, such as wireless telephones, must also be tested with respect to their transmission frequencies and harmonics. 11-108. IDENTIFICATION STENCILS AND PLACARDS ON ELECTRICAL EQUIPMENT. Replace worn stencils and missing placards. 11-109.11-114. [RESERVED.] Page 11-50 Par 11-107

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