Aircraft Flight Compartment Systems Quiz

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Questions and Answers

What is the primary function of instrument panel lights in the flight compartment?

To serve as backup navigation lights

To illuminate dials and control panel lettering (correct)

To control the dimming of overhead cabin lights

To provide external flood lighting for the runway

Which system allows the pilot to test the indicator lights in the flight compartment?

Lighting Control Panel

Flight Deck Control Module

Flight Compartment Illumination System

Master Dim and Test System (correct)

How many predetermined intensity levels does the master dim and test system offer for indicator lights?

Three

Four

One

Two (correct)

What type of lights are primarily used for flight compartment illumination?

Incandescent dome lights Signup and view all the answers

What function do the auxiliary lights serve in the flight compartment?

To provide lighting for maps and charts Signup and view all the answers

What is the primary function of the master dim and test system in the B747-400?

Control light levels of indicator lights and displays Signup and view all the answers

Where is the master dim and test control module located within the B747-400?

Behind the flight deck coat closet Signup and view all the answers

What is the purpose of the momentary test position of the dim and test switch?

To turn on all the indicator lights Signup and view all the answers

What happens when the dim and test switch is held in the test position for 10 seconds?

The indicator lights begin to dim Signup and view all the answers

Which component receives power for illumination from the master dim and test system?

Engine fuel control switches Signup and view all the answers

How is light intensity adjusted in the master dim and test system?

Using a three-position bright/dim/test switch Signup and view all the answers

What does the bright and dim positions of the master dim and test switch specifically allow for?

Selection of light intensity levels Signup and view all the answers

Which of the following statements is true about the indicator lights when the switch is placed in the TEST position?

All indicator lights will illuminate except for certain ones Signup and view all the answers

What should be done before testing or relamping the lighting system?

Deactivating the associated system Signup and view all the answers

What is the potential consequence of failing to deactivate the associated system?

Serious accidents and equipment damage Signup and view all the answers

What is the correct method for removing the lens cap?

Pulling gently until the lock disengages Signup and view all the answers

What precaution should be taken when reinserted the lens cap?

Pull appropriate circuit breaker to prevent damage Signup and view all the answers

What contains the system switches and circuit module for the lighting indicators?

Master module assembly Signup and view all the answers

How can access to the mounting lug screws be achieved?

By removing the cap assembly Signup and view all the answers

What action must be performed to stow the mounting lugs inside the housing assembly?

Turn the screws counterclockwise Signup and view all the answers

What component should be in the unlatched position to facilitate lens cap removal?

Alternate action switch lights Signup and view all the answers

Study Notes

Boeing B747-400 ATA 33 Lights

Revision: 1SEP2009
Document type: Training manual
Intended use: For training purposes only
Copyright: Lufthansa Technical Training (LTT) owns all rights to training documents and software. Any use outside of training is prohibited.
Maintenance Level: 3
Aircraft model: Boeing B747-400
ATA 33 Code: 33
Topic: Lights
Content notes: This document details the various light systems on the Boeing B747-400, including their functions, descriptions, maintenance procedures, and diagrams. It's specifically for Level 3 maintenance.

General Introduction

Types of lamps: White incandescent and fluorescent lamps are used in all aircraft light assemblies. Colored illumination (e.g., instrument panel indicators) is achieved using colored lenses.
Check lamp identification numbers: Before installing lamps, always check the identification number to ensure correct voltage rating. Incorrect voltage ratings can damage circuitry.
Lamp Usage Chart: Refer to the Lamp Usage Chart for information on locating all lamps. Refer to Standard Schematic Manual (SSM) 33-00-01.

Flight Compartment Lighting

Areas illuminated: Flight compartment lighting illuminates control cabin work areas and control panels.
Master dim and test system: A master dim and test system allows pilots to test indicator lights and select predetermined light intensity levels.

Passenger Compartment Lighting

Location and functionality: Lights illuminate seating areas, aisles, entrances, lavatories, galleys, and crew rest areas. Includes call lights and information displays for passengers and crew.

Cargo and Service Compartment Lighting

Function: Lights illuminate cargo and service compartment areas, such as maintenance and loading areas, during ground operations.

Exterior Lighting

Purpose External lights illuminate the aircraft during flight and ground operations (runways and taxiways).
Examples Lights include lights designed for takeoff, landing, and taxiing, plus navigation and anti-collision lights.

Emergency Lighting

Purpose: Emergency lights illuminate escape routes during failures. They are located in interior and exterior areas.

Panel Light Dimmer Units

Function: Provide variable AC power to panel lighting circuits.
Power inputs & outputs: Input voltage is 115 volts AC; output is 0 to 5 volts AC.
Location: Several dimmer units are located on the P7 panel.
Maintenance: Dimmer units have one or two secondary circuit breakers for protection.
Caution: Never operate dimmer units without a load as this may cause transformer burn out.

Indicator Lights

Purpose: Indicator lights show system status.
Relamping: Replace both lamps even if one fails.
Removal procedure: Removal requires removal of the lens cap and following the correct procedures to avoid damaging the lens.

Switch Lights

Function: Switch lights control inputs to the associated systems. Displays indicate switch position and/or system status using momentary and alternate-action switches.

Integral Panel Lights

Description: Acrylic panel overlays with internally-mounted small incandescent bulbs illuminate panel lettering and schematics.

Master Dim and Test System

Main component: The M886 module provides control for various light levels of indicator lights and aisle stand displays.
Location: Positioned within the flight deck coat closet.
Control switch: Located on the right panel lighting module (P5) with three settings for bright, dim, and test.

Flight Deck Access Lights

Functionality: Provide illumination for entryways into the cockpit from the exterior, including access paths from main doors and from the equipment bay.
Location: Mounted in specific locations, such as ceiling lights above stairwells, ceiling lights over doorways, and lights near the auxiliary equipment bay.
Control: The lights are operated by switches near the entry points and in the cockpit.

Cargo Compartment Lights

Description: A system of dome lights illuminates the cargo area, with additional lights near doorways for better visibility.
Purpose: Ensure safe cargo handling and loading during ground operations.
Power supply: The 115-volt AC ground handling bus powers these lights.

Exterior Lights (General)

Types: Includes wing, landing, navigation, strobe anti-collision and logo lights, cargo door lights, and runway turnoff lights.

Exterior Lights (Wing Illumination Lights)

Location/Mounting: Flush-mounted on the wing, above the fuselage and wing intersection.
Lamp type: Sealed-beam incandescent lamps.
Function: Illuminate wing leading edges and engine nacelles.

Exterior Lights (Landing Lights)

Location/Mounting: Positioned in the forward wing leading edges.
Lamp type: Halogen sealed-beam lamps.
Function: Provide illumination of the runway during landing and takeoff.

Exterior Lights (Runway Turn Off Lights)

Location/Mounting: Nose wheel light panel.
Lamp type: Sealed-beam incandescent lamps.
Function: Illuminate runway turnoff areas.

Location/Mounting: Wingtips and tail cone.
Lamp type: Quartz halogen lamps.
Purpose: Provide directional and positional cues.

Exterior Lights (Strobe Anti-Collision)

Location/Mounting: Fuselage top and bottom, wingtips and tail cone.
Lamp type: Xenon flashtubes.
Function: High-intensity flashing lights to improve visibility..

Exterior Lights (Logo Lights)

Location/Mounting: Upper horizontal stabilizer.
Purpose: Illuminate airline insignia on the vertical fin.

Exterior Lights (Cargo Door Lights)

Location/Mounting: Near the cargo doors on the fuselage.
Purpose: Enhance visibility for cargo handling.

Emergency Lights

Purpose: Provide illumination for cabin and exit routes during power outages.
Components: Various light modules distributed in the cabin (ceiling, doors, overwings) with floor proximity lights, as well as, lighted EXIT signs.
Power: Powered by 28-volt DC bus 4, using an emergency power source.

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Description

Test your knowledge about the functions and systems of the aircraft flight compartment. This quiz covers the role of instrument panel lights, indicator light systems, and illumination types. Perfect for aviation students and enthusiasts alike!