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ILS deviations go to both AIMS cabinets to show ILS data on the primary flight displays (PFDs) and navigation displays (NDs).
ILS deviations go to the autopilot flight director computers (AFDCs) for autoland calculations. The AFDCs send ILS tune inhibits during approach mode.
The left MMR sends glideslope deviation to the ground proximity warning computer (GPWC) for mode 5 alerts.
The receivers also send station audio and identifier signals to the audio management unit (AMU).
The receivers get discrete inputs from the air/ground relays.
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777 AIRCRAFT MAINTENANCE MANUAL

ILS -GENERAL DESCRIPTION

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ILS -FLIGHT DECK COMPONENT LOCATION

General
The components on the flight deck that interface with the ILS system are:
*
Left and right EFIS control panels

*
Captain and first officer primary flight displays (PFDs) and navigation displays (NDs)

*
Left and right CDUs

*
Audio control panels (ACP).

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777 AIRCRAFT MAINTENANCE MANUAL

ILS -FLIGHT DECK COMPONENT LOCATION

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ILS -MAIN EQUIPMENT CENTER COMPONENT LOCATIONS

Equipment Center
These are ILS components in the main equipment center:
*
Left, center, and right glideslope antenna switches

*
Left, center, and right multi-mode receivers (MMRs)

*
Left, center, and right localizer antenna switches

*
Left and right resistor assemblies

*
Left and right RF power dividers.

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ILS -MAIN EQUIPMENT CENTER COMPONENT LOCATIONS

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ILS -NOSE RADOME COMPONENT LOCATIONS

General
The ILS components in the nose radome are:
*
Left localizer antenna

*
Right and center localizer antennas

*
Left glideslope capture antenna

*
Right and center glideslope capture antennas.

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777 AIRCRAFT MAINTENANCE MANUAL

ILS -NOSE RADOME COMPONENT LOCATIONS

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ILS -FUSELAGE COMPONENT LOCATIONS

VOR Antenna
The VOR antenna is on top of the vertical stabilizer. The VOR antenna receives VOR and localizer signals.
Glideslope Track Antennas
The glideslope track antennas are on the leading edge of the left and right aft nose gear doors.
The left and center glideslope track antennas are on the left aft nose gear door and the right glideslope track antenna is on the right aft nose gear door.
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777 AIRCRAFT MAINTENANCE MANUAL

ILS -FUSELAGE COMPONENT LOCATIONS

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ILS -POWER INPUTS

Power Inputs
The left and right multi-mode receivers (MMRs) get 115v ac, 400 Hz power from the left and right 115v ac transfer buses. The center MMR gets 115v ac, 400 Hz power from the AC standby bus.
The left and right localizer and glideslope antenna switches get 28v dc from the left and right main DC buses. The center localizer and glideslope antenna switches get 28v dc from the DC standby battery bus.
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777 AIRCRAFT MAINTENANCE MANUAL

ILS -POWER INPUTS

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ILS -ANALOG AND DISCRETE INTERFACE

General
The LRUs that interface with the multi-mode receivers (MMRs) with analog and discrete signals are:
*
Left and right control display units (CDUs)

*
Air/ground relays

*
Left, right, and center autopilot flight director computers (AFDCs)

*
Audio management unit (AMU).

　
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