Honeywell SPZ-8000 Maintenance Manual page 614

direct-
source
y display navigation maps on the CDU; however, the FMS is the
of map data for other cockpit displays such as EFIS. Display of
maD data is achieved bv the utilization of the internal database and ASCB
1/0.
A large portion ~fthe navigation database is subject to updating
on a 28-day interval. The DL-800/900 data loader is used for this
purpose.
The navigation part of the FMS may be considered an area navigation
system or RNAV. Its fundamental purpose is to provide navigation
information relative to a selected geographically located point.
Navigation management will allow the pilot to define a route from the
aircraft present position to any point in the world. The system will
output advisory information and steering signals to allow the pilot or
automatic flight control system (AFCS) to steer the aircraft along the
desired route. Routes are defined from the aircraft present position to
a destination waypoint via a direct great circle route or via a series of
great circle legs connected by intermediate waypoints.
The purpose of the PZ-800 computer is to provide the pilot with detailed
performance information and automatic control of the throttles.
Previously, detailed performance information was only available by
spending a great deal of time in the aircraft performance manuals. With
the performance functions of the PZ-800, the pilot now has access to a
computerized performance manual. The pilot is supplied with
flight-planning information prior to takeoff such as fuel and time
required.
In flight, the system provides the pilot with real time
information based on current aircraft and atmospheric conditions. In
case of changes to the flight plan, the pilot can be updated immediately
on the consequences of the changes. This capability extends the pilots
ability to conduct the flight safely and economically.
The performance system is enhanced by the autothrottle. Aircraft
parameters calculated by the performance functions can be coupled to the
autothrottle and flight guidance computer for effortless tracking of
these commands. Alternatively, the autothrottles can be set to maintain
pilot-entered values. In addition to the PZ-800 computer, the
autothrottle function requires one SM-81O Autothrottle Servo-Clutch
assembly for each engine controlled. Inputs from the throttles, engines,
autopilot control panel, and display controller are also required.
22-14-00
Page 298.150
Aug 15/91
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