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velocity vector position. A complete air data function failure does not immediately affect the pitch
ladder/velocity vector, but these displays eventually degrade. If subtle damage to the AOA probe is
suspected, the pilot should make a cross check of airspeed with a wingman if possible. The standby
airspeed indicator receives signals from the left pitot static probe, so it is accurate if only the right
probe is damaged. AOA checks with a wingman should be made in landing configuration if a jammed
AOA probe is suspected. Cross checking in cruise configuration may give a satisfactory cross check, but
the probe may be bent in such a way that AOA anomalies are accentuated on landing configuration.
Landing with automatic throttle control (ATC) may be affected. If damage is suspected, ATC during
landing is not recommended.
When AOA is declared invalid (e.g., four channel AOA failure), the HUD AOA display and AOA
bracket are removed and the AOA indexer lights and approach lights are inoperative. GAIN ORIDE
provides fixed gains to the FCS and allows the pilot to select, through the FCS status display, either
the left or right probe. The center (INS) AOA value allows the pilot to compare AOA values to select
the undamaged probe. Once selected, this probe drives the HUD AOA display, AOA bracket, AOA
indexer, and approach lights. If the incorrect probe is selected, the information provided to the pilot
and LSO may be in error but has no impact on the flight control system as the gains are fixed. Notify
the LSO that a single probe has been selected.
2.18.4.6.12 HUD Advisory Data Symbology. The displays in figure 2-45 show some of the advisories
that can appear on the HUD in the NAV master mode. The advisories are associated with nose wheel
steering and approach power compensator. Although the advisories are shown on the gear down
display, most of them can appear on the basic HUD display. Refer to Part VII for description of data
link system and advisories.
The automatic throttle control/nosewheel steering advisories are displayed above the distance
display whenever the ATC or the NWS is engaged. If the ATC is disengaged by any means other than
actuation of the ATC engage/disengage switch, the advisory is flashed for 10 seconds before it is
removed from the display or, if a pilot attempt to engage ATC is not successful, ATC is flashed for 10
seconds and removed.
2.18.4.6.13 HUD BIT Checks. The HUD has two methods of built-in tests: manually initiated and
automatic test. Refer to BIT-Status Monitoring Subsystem for the procedures and displays used for
the HUD BIT checks.
2.18.4.7 CRS Set Switch. The course set switch manually sets the desired course on the HSI display.
A1-F18EA-NFM-000
I-2-146 ORIGINAL
2.18.4.8 HDG/TK Set Switch. The heading/ground track set switch manually sets the heading
marker on the desired heading/ground track on the HSI display.
2.18.5 UFCD - Up Front Control Display. The UFCD is on the main instrument panel below the
HUD. The UFCD is an active matrix liquid crystal display with an infrared (IR) touchscreen which is
used for data entry inputs and control of the CNI systems (autopilot modes, IFF, TACAN, ILS, data
link, radar beacon, UHF/VHF radios and ADF), see figure 2-47. In addition, the touchscreen can be
used as a multi-function display for display formats, including video. The UFCD is used in conjunction
with the two DDIs and the MPCD to enter navigation, sensor, and weapon delivery data. UFCD option
selections and inputs are transmitted directly to the MPCD and on to the mission computers. (The
mission computers pass these inputs to the control converter (CC) for CNI equipment control). The
UFCD is NVG compatible. In the F/A-18F, the front and rear cockpit UFCDs operate independently.
When different formats are being displayed, the only data common to both UFCDs is radio channel
and frequency information. Both cockpit UFCDs present the results of changes to radio channels or
frequencies at the same time, regardless of which cockpit performed the change. When both UFCDs are
displaying the same format the same information is displayed on each UFCD. The cockpit not
performing data entry does not see touch highlights as the data is entered, only the result of the data
entry after ENT is pressed. If both pilot and WSO enter digits on the keypad for the same option, both
entries are accepted, with the second entry overwriting the first. When pilot and WSO are on the same
data entry or CNI format, asterisks are provided in the top left and right of the scratch pad.
When the pilot or WSO touch a keypad option on the touch screen a highlight appears indicating
that the option has been selected. Figure 2-47 shows an example of a selected option. When a new
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本文链接地址：
NATOPS Flight Manual 飞行手册 1(106)
