777 AIRCRAFT MAINTENANCE MANUAL
ANTI-COLLISION LIGHTS -OPERATION
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ANTI-COLLISION LIGHTS -FUNCTIONAL DESCRIPTION
Functional Description
The BEACON and the STROBE light switches send signals to the OPAS.
The beacon signal goes to the ELMS electronics unit (EEU) in the P210 right power management panel. The strobe signal goes to the EEU the P110 left power management panel.
Switches close in the panels and cause the red and white anti-collision light control relays to energize. This makes power go to the power supplies.
The power supplies have a timer and a pulse generator. These make the lights flash.
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BOEING PROPRIETARY -Copyright # -Unpublished Work -See title page for details.
LOGO LIGHTS -INTRODUCTION
Purpose Since there are two lights on each side of the stabilizer, one indication of a failed light is a decrease in the amount of light on
The logo lights give light to both sides of the vertical stabilizer.
that side.
Location
The lights are on the upper side of the horizontal stabilizer. They are near the leading edge. There are two on each side of the vertical stabilizer.
Physical Description
The logo light is a two-pin, flange-mounted light. It has these components:
*
Reflector
*
Lens
*
Lens retainer
*
Transformer (not shown).
The transformer is part of the light. Two captive screws hold the reflector in position.
You remove the lens retainer and lens as one part. This gives you access to the light. There are six screws that hold the lens retainer.
Training Information Point
When you replace the lens retainer make sure the INBD arrow points inboard.
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LOGO LIGHTS -INTRODUCTION
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LOGO LIGHTS -OPERATION
Operation
You use the logo lights switch (LOGO) to operate the logo lights. It is on the anti-ice/lighting panel on the P5 overhead panel. It is an alternate-action switch.
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LOGO LIGHTS -OPERATION
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LOGO LIGHTS -FUNCTIONAL DESCRIPTION
Functional Description
The logo light switch sends signals to the overhead panel ARINC 629 system (OPAS). The signal goes to the ELMS electronics unit in the right power management panel.
A switch closes and energizes the logo lights control relay. This makes the four logo lights come on. A transformer decreases the voltage to 13v ac.
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LOGO LIGHTS -FUNCTIONAL DESCRIPTION
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EMERGENCY LIGHTING -INTRODUCTION
Purpose * On the galleys
* In the flight compartment.
The emergency lights give light when normal power sources The power supplies (not shown) are above the ceiling, near
are not available. each passenger entry door.
They give light: There are controls (not shown):
*
In the aisles
*
To identify exits * In the flight compartment
*
*
To identify routes to the exits. On some attendants panels
*
*
Outside the airplane at the slides. On the nose gear.
Physical Description
The emergency lighting system has these components:
*
Area lights
*
Exit signs
*
Slide lights
*
Floor proximity lights
