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COMMUNICATIONS Nav 1 Receiver Just to the left of the autopilot is the Navigation receiver for Nav1. Input for frequency and course for Nav1 is on this unit. The mouse click areas are left and right of each knob. When inputting a Nav frequency it does not become active right away. It is activated by clicking the center of the NAV frequency knob. This method allows an active frequency and to also select a standby. To determine which frequency is active look at the EHSI display for the VOR/ILS identification. Clicking on the ID switch enables the "ident" feature which allows the pilot to listen to the morse code identification of the selected frequency. © Holger Ludwig, EuCom Airlines & Terry Yingling Seite 17 von 53 http://www.eucomairlines.de Radios There are four separate radios that are selected using the switches on the left side of the radio. The COM, NAV and ADF radios have both "active" and "standby" frequency windows. The active frequency is determined by clicking on the transfer switch (TFR). Standby and active frequencies can be changed at anytime. The active frequency window will become highlighted. Each knob has mouse click areas to the left and right of the knob for the changing of frequencies. The ADF radio also has a click area in the center of the knobs. AUTOPILOT FLIGHT DIRECTOR SYSTEM (AFDS) © Holger Ludwig, EuCom Airlines & Terry Yingling Seite 18 von 53 http://www.eucomairlines.de The AFDS has six basic functions. An autothrottle, altitude management, heading management, navaid tracking, approach and autoland systems. A single Mode Control Panel (MCP) provides control of the AFDS. The AFDS is turned on by clicking the F/D toggle switch to ON. The MCP has mode selector switches that are operated by a click of the mouse. A light bar in the lower half of a mode switch will light up to indicated that that particular mode has been activated. There are three autopilot systems designated as channels L, C and R. To engage the autopilot select any 1 of the 3 autopilots by clicking the corresponding CMD button. To disengage the autopilot just click the "DISENGAGE" bar one time and then a second time to cancel the warning. Multiple autopilot operation is possible in APP mode only and provides an autoland feature. Autothrottle Modes AUTOTHROTTLE ARM SWITCH The autothrottle is engaged from the MCP using the switch labeled "A/T". The EADI will also annunciate the engagement of the autothrottle with a green A/T. Once the autothrottle is engaged the autopilot will control all power changes. It will adjust power to maintain the selected airspeed in the following modes: SPD, FL CH and VNAV. N1 SWITCH This mode is used primarily for takeoff or climb and is not tied to the airspeed value. It will set the power to the max available N1 setting. In this panel it is a pre-programmed value. The airspeed in the IAS/MACH window will not be maintained by the autothrottle in this mode. AUTOTHROTTLE DISCONNECT LIGHT Illuminates when autothrottle becomes disconnected. IAS/MACH DISPLAY To adjust the airspeed value use the mouse clicks next to the knob. Power will be adjusted and the airspeed will be maintained by the autothrottle in SPD, FL CH or VNAV modes. IAS/MACH SWITCH Selection of IAS or MACH is done by clicking the SEL button. © Holger Ludwig, EuCom Airlines & Terry Yingling Seite 19 von 53 http://www.eucomairlines.de SPD SWITCH This mode is used by the V/S and ALT HOLD mode. SPD mode will cause the autothrottle to maintain the proper power required to maintain the speed selected at the autopilot. Most of the time this mode will automatically select with the selection of a vertical mode. Altitude Management Modes In addition to an altitude hold function there are three methods to change altitude with this autopilot: VNAV, FL CH and VERT SPD. When a new altitude is selected the aircraft "remembers" the last assigned altitude and will only start to climb/descend when a vertical change mode is selected. VNAV The VNAV button will cause climbs and descents at a fixed rate while maintaining the selected IAS/MACH. It will also maintain the selected altitude in the ALT window. If the VNAV is maintaining a pre-selected altitude and a new altitude is set, the autopilot will not initiate a climb/descent until the ALT button is pressed. VNAV overrides the ALT HLD mode when VNAV is in use. When in VNAV mode and selecting a new altitude, the ALT select knob must be clicked to initiate the vertical movement. Additionally when arriving at the selected altitude the aircraft remains in VNAV mode instead of changing to ALT HLD. VNAV will override www.aero.cn 航空翻译 www.aviation.cn 本文链接地址：航空资料7
