777 AIRCRAFT MAINTENANCE MANUAL
ILS -PFD NCD AND INVALID ILS DISPLAYS
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ILS -ND ILS DISPLAYS
General
Select approach (APP) on the EFIS control panel to show ILS displays on the navigation display (ND). The data shows in both the expanded or center mode formats. Use the mode selector on the EFIS control panel to choose which format shows on the ND.
ILS Displays
These are the ILS displays on the ND:
*
Reference receiver for ILS deviation
*
ILS frequency or identifier
*
ILS course
*
Localizer deviation indication
*
Localizer deviation scale
*
Glideslope deviation pointer
*
Glideslope deviation scale.
Display Source Priority
The flight crew cannot manually select a multi-mode receiver (MMR) for the ND. When a MMR fails, the AIMS selects another MMR to show on the ND. LOC and G/S flags show on the NDs when all MMRs fail.
This is the AIMS priority selection of ILS display data on the ND:
Reference Receiver for ILS Deviation
The reference receiver for ILS deviation shows to the left of the frequency display. It identifies the left, right, or center receiver as the source for the ILS deviation displays.
ILS frequency or Identifier
The ILS frequency or identifier show at the top right corner of the ND. The frequency shows until the receiver decodes the station identifier. When the receiver decodes the station identifier, the four letter code replaces the frequency.
ILS Course
The ILS course shows below the ILS frequency display at the upper right corner of the ND. The three digit display corresponds to the position of the course arrow. The display range is 1 degree to 360 degrees.
Localizer and Glideslope Deviation
The localizer deviation indication and scale show in the center of the ND. In the expanded ND format, the deviation scale shows at the bottom of the ND. The deviation scale is the standard four dot scale where one dot is equal to 1 degree of deviation. The deviation indication shows deviation to the left or right of the runway centerline.
Captain PFD L, C, R
First Officer’s PFD R, C, L
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ILS -ND ILS DISPLAYS
The glideslope deviation scale and pointer show at the right side of the ND. The fixed scale is the standard four dot scale where each dot equals 0.35 degrees of deviation. The pointer gives fly to commands to intercept the glideslope beam.
Backcourse
Backcourse happens when the airplane track and runway heading are more than 90 degrees apart. In a backcourse configuration, the glideslope pointer goes out of view.
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ILS -ND ILS DISPLAYS
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ILS -ND ILS NCD INDICATIONS
ILS Course
When the ILS course input is NCD, dashes replace the three digit course. These are the displays that go out of view:
*
Course pointer
*
Localizer deviation indication
*
Localizer deviation scale
*
Glideslope deviation pointer
*
Glideslope deviation scale.
ILS Frequency
When the ILS frequency is NCD, dashes replace the frequency. These are the displays that go out of view:
*
ILS course
*
DME
*
Localizer deviation indication
*
Glideslope deviation pointer.
The localizer scale goes to the horizontal position.
ILS Deviation
The localizer deviation indication goes out of view when the localizer deviation is NCD. The glideslope deviation pointer goes out of view when the glideslope deviation is NCD.
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ILS -ND ILS NCD INDICATIONS
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ILS -ND ILS INVALID DISPLAY
Localizer Frequency 中国航空网 www.aero.cn 航空翻译 www.aviation.cn 本文链接地址：777 AMM 飞机维护手册 导航 Navigation 1(29)
