737 Flight Crew Operations Manual
Flight Instruments, Displays Chapter 10
Head-Up Display System Description Section 22
Boeing Proprietary. Copyright © Boeing. May be subject to export restrictions under EAR. See title page for details.
D6-27370-866-EGP 10.22.1
This Section Applies to YK981 - YQ456
22 Head-Up Display System DescriptionHead-Up Display System DescriptionFile Highlight
Introduction
The Head-Up Display (HUD) system uses electronics and optics to calculate and
display flight information. The flight information is displayed as flight symbols
which project on to a transparent glass screen in front of the pilot. The flight
symbols overlay and combine with the outside view through window No. 1.
The HUD system can be used during manual flight operations, or with the AFDS
engaged during automatic flight operations. When used manually, internal HUD
guidance is used to control flight symbology and is independent of any AFDS
derived or displayed flight director guidance.
HUD system components, combined with other airplane systems, produce flight
symbology displayed in four distinct modes of operation. Each mode of operation
has unique characteristics, and is intended to be used during a particular phase of
flight based on system capability and meteorological conditions. TCAS resolution
advisories and system failure flags are also displayed when active. Detailed
information on display symbology is found in Section 42 of this chapter.
The HUD system consists of the following components:
• HUD computer
• Overhead unit (OHU)
• Combiner
• Control panel
• Annunciator panel
HUD Computer
The HUD computer receives input signals from aircraft sensors and equipment
and converts this data to symbology for display on the combiner. The computer
also evaluates system and approach performance through extensive Built-In Test
Equipment (BITE), input validation, and approach monitor processing. If an out
of tolerance condition exists, the applicable annunciation appears on the combiner
and/or annunciator panel. Internal components control the following functions:
• Guidance control
• Shape and position of flight symbols
• Airplane sensor status
• HUD system status
• HUD system mode.
September 15, 2016
To Next Page
Loading...
