(2)
Those systems which determine airplane attitude and direction.
(3)
Those systems which provide landing and taxiing aids.
(4)
Those systems which are self-contained and independent of ground-based equipment.
(5)
Those systems which are dependent upon and operate in conjunction with ground-based equipment.
B. The various navigation units are located in four main equipment centers throughout the aircraft and are remotely controlled and displayed from the flight compartment. These equipment centers are:
(1)
Forward equipment center
(2)
Main equipment center
(3)
Forward center fuselage equipment center
(4)
Aft center fuselage equipment center
C. Receiving and/or transmitting antennas required by navigation systems are located externally on the aircraft as shown in figure 1.
D. Navigation system information is displayed in analog and/or digital form on the flight instruments. (See figure 2.) The flight instruments interface with several systems through the flight instrument switching network. Operation of these instruments is described separately under each related system as follows:
(1)
Attitude Director Indicator (ADI)
(a)
Inertial navigation system (Refer to 34-41-00, INS -Description and Operation; and 34-41-05, ADI -Adjustment/Test.)
(b)
VOR/ILS system (Ref 34-31-00, Description and Operation).
(c)
Low range radio altimeter system (Ref 34-33-00, Description and Operation).
(d)
Auto throttle system (Ref 22-31-00, Description and Operation).
(e)
Flight director system (Ref 34-26-00,Description and Operation)
(f)
Yaw damper system (Ref 22-16-00, Description and Operation).
(2)
Horizontal Situation Indicator (HSI)
(a)
Inertial navigation system (Ref 34-41-00, Description and Operation; and 34-41-06, Removal/Installation).
(b)
VOR/ILS system (Ref 34-31-00, Description and Operation).
(c)
Magnetic heading reference system (Ref 34-21-00, Description and Operation).
(3)
Radio Magnetic Indicator (RMI)
(a)
Magnetic heading reference system (Ref 34-21-00, Description an Operation; and 34-21-06, Removal/Installation).
(b)
VOR/ILS system (Ref 34-31-00, Description and Operation).
(c)
ADF system (Ref 34-57-00, Description and Operation).
(d)
Distance measuring equipment (Refer to 34-55-00, DME -Description and Operation.)
EFFECTIVITY
AZ ALL CONFIG 1 LH ALL 26 Page 1 Oct 10/73
34-00-00
(4)
Air Data Pressure Instruments (Ref 34-13-00, Description and Operation; Adjustment/Test).
(5)
Optional analog, digital, and illuminated displays. (Refer to pertinent related system.)
2. Pitot-Static System (34-11-00)
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A. The pitot-static system senses the dynamic (pitot) and ambient (static) air pressure external to the aircraft and supplies these two pressures to the indicators and control units determining the functions of vertical speed, airspeed, mach number, or altitude.
3. Central Air Data Computer System (32-12-00) Bendix 1903925
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A. The central air data computer system provides computed air data to the airplane flight control, inertial navigation, air traffic control, ground proximity warning and air data instrumentation systems. The central air data computer outputs consist of electrical and electromechanical analogs of selected and computed functions of altitude, airspeed, mach number, and air temperature. These outputs are derived from dynamic (pitot) pressure, ambient (static) pressure, and total air temperature; all sensed external to the airplane.
4. Air Data Pressure Instruments (34-13-00)
_____________________________
A. The air data pressure instruments are a group of instruments displaying information relative to the atmosphere surrounding the airplane. This information includes functions of airspeed, barometric altitude, mach number, and air temperature and is determined by sampling the surrounding atmosphere.
5. Mach Airspeed Warning System (34-14-00) Lear Siegler B070710011
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Aero Mechanism 6501
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本文链接地址：747飞机维护手册AMM CHAPTER 34 - NAVIGATION 第34章导航1(9)
