Cargo and Service Compartment Lighting Quiz

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Questions and Answers

What is the purpose of cargo and service compartment lights?

To light up the runway during takeoff and landing

To provide illumination for the flight crewmembers

To signal other aircraft in the vicinity

To assist in cargo handling and service activities (correct)

What type of lights are commonly used in cargo compartments, wheel wells, and servicing compartments?

Landing lights

Floodlights (correct)

Beacon lights

Strobe lights

How are the cargo/service compartment lights powered?

Solar power

Internal power or external power source (correct)

Wind power

Battery power

What type of lighting is usually found in the flight compartment?

Overhead fluorescent lights Signup and view all the answers

What provides background lighting for the pilots in the flight compartment?

Lightshield Signup and view all the answers

Which part of the aircraft is illuminated by overhead floodlights?

Cockpit control stand Signup and view all the answers

What is the primary purpose of the Overspeed Warning system?

To alert the flight crew if the airspeed exceeds the Vmo/Mmo limits calculated by the air data computer. Signup and view all the answers

What is the scrap life of self-illuminating signs according to the text?

5 years Signup and view all the answers

When is the Altitude Alerting System inhibited according to the text?

When glideslope is captured or when landing flaps are selected with the gear down Signup and view all the answers

What is the first indication of an overspeed situation according to the text?

The siren or horn sounds Signup and view all the answers

How does the Overspeed Warning system obtain its input?

From the air data computers (ADCs) via the flight warning system Signup and view all the answers

What is the significance of the Radioactive Substances Act 1960 and the Radioactive Substances (Luminous Articles) Exemption Order 1962 mentioned in the text?

They govern the disposal of broken signs that are subject to radioactive substances. Signup and view all the answers

What function do both master caution lights have on the system?

Push to Cancel, Push to Recall Signup and view all the answers

Which lights provide additional lighting for the doorways in the passenger compartment?

Entry and threshold lights Signup and view all the answers

What does the 'Reading Reset' switch on the Attendant Panel do?

Switch off all reading lights in one action Signup and view all the answers

How long is the reading light supply broken for when the 'Reading Reset' switch is activated?

16 seconds Signup and view all the answers

What storage feature is located in the Passenger Service Unit (PSU)?

Life vest storage Signup and view all the answers

What does the 'Read Lights Test' switch on a maintenance panel enable?

Switching on all reading lights for inspection Signup and view all the answers

What is the purpose of pin A (CHARGE and HOLD-OFF) on the emergency lighting circuit?

To charge the internal batteries and keep the transistor off when voltage is present Signup and view all the answers

How can the emergency lights be switched off after they have been activated?

By applying voltage to pin C (DISARM) Signup and view all the answers

What is the purpose of pin B in the emergency lighting circuit?

To supply voltage from the battery power supply unit to 'arm' the emergency lights Signup and view all the answers

What is the potential hazard associated with self-illuminating signs that use tritium gas?

Inhalation or absorption of the mildly radioactive tritium gas if the glass envelope breaks Signup and view all the answers

What is the recommended action if a self-illuminating sign breaks and releases tritium gas?

Evacuate the aircraft and leave all doors open to allow maximum ventilation Signup and view all the answers

How long does it take for the internal batteries in the emergency lighting circuit to fully recharge?

Up to 20 hours Signup and view all the answers

What is the primary function of an angle of attack (AoA) sensor in a stall warning system?

To measure the angle between the wing chord line and the relative airflow direction Signup and view all the answers

What typically causes a wing to stall?

Separation of the slow-moving air (boundary layer) from the upper wing surface Signup and view all the answers

What is the typical range of stalling angles of attack for straight wings?

12° to 18° Signup and view all the answers

Which of the following is NOT a component of a stall warning system mentioned in the text?

Pitot-static system Signup and view all the answers

What are the two types of angle of attack (AoA) probes mentioned in the text?

Conical slotted probe and vane detector Signup and view all the answers

How does the stalling angle of attack for swept or delta wings compare to that of straight wings?

Swept or delta wings have a higher stalling angle of attack Signup and view all the answers

Study Notes

Cargo and Service Lighting

Purpose: to provide necessary illumination for cargo handling and service activities
Types of lights used: dome lights, floodlights
Power sources: internal power or external power source
Switches: provided within the compartments the lighting serves

Flight Compartment Lighting

Purpose: to provide illumination for the flight compartment, instruments, controls, and equipment
Types of lights used: dome lights, lightshields, integral lighting for instruments and instrument panels
Additional lighting: overhead floodlights for the control stand, floodlights for circuit breaker panels, lights for standby compass and map lighting

Altitude Alerting System (Boeing 767)

System inhibition: altitude alerting is inhibited in flight whenever glideslope is captured or when landing flaps are selected with the gear down

Overspeed Warning System

Purpose: to alert the flight crew if the airspeed exceeds the Vmo/Mmo limits calculated by the air data computer (ADC)
Operation: sounds the siren or horn, illuminates the red master WARNING lights, and displays the message OVERSPEED on the EICAS upper display in red

Master Caution/Failure Panel (B737)

Purpose: to receive inputs from various fault annunciators to illuminate two master caution lights and one of twelve sections of the master caution annunciators
Function: "Push to Cancel", Push to Recall" function

Passenger Compartment Lighting

Purpose: to provide illumination for the passenger compartment
Types of lights used: ceiling and window lights, entry and threshold lights, lavatory lights, reading lights, passenger information signs, and attendant call system

Passenger Service Unit (PSU)

Components: reading lights, Fasten Seat Belt & No Smoking signs, attendant call button, air conditioning fans, life vest storage, and oxygen mask storage

Passenger Reading Lights

Operation: switched on or off using a touch-control button on a Passenger Panel
Feature: 'Reading Reset' switch on the Attendant Panel to switch off all reading lights in one action
Test: 'Read Lights Test' switch on a maintenance and test panel enables all reading lights to be switched on for inspection

Emergency Lighting

Purpose: to provide illumination in emergency situations
Operation: internal batteries are charged when 28V is on pin A (CHARGE and HOLD-OFF), and the lights turn on when voltage is removed from pin A and B
Disarm: putting 28V on pin C (DISARM) to switch off the emergency lights

Self-Illuminating Signs

Hazard: inhalation or absorption of gas released in the event of breakage of the glass envelope
Precaution: handle carefully to avoid breakage, and evacuate the aircraft and open doors for ventilation if breakage occurs

Stall Warning System

Purpose: to alert the flight crew of a stall condition
Components: angle of attack sensing, stick-shaker motor, angle of attack indicator, aural warning, synthetic voice warning, and red master WARNING light
Angle of Attack (AoA) sensing: measures the angle between the chord line of the wing and the direction of the relative airflow
Critical AoA: varies depending on the aircraft design, typically between 12° and 18° for straight wings, and up to 30° or 40° for swept or delta wings

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Description

Learn about the purpose and function of cargo and service compartment lights in providing illumination for cargo handling and service activities. Explore the types of lights used and how they can operate from internal or external power sources.

Cargo and Service Compartment Lighting

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