8 Questions
What is the primary purpose of a Master Call Light panel in an aircraft cabin?
To provide a visual indication of calls initiated or events requiring attention
What color is the Master Call Light for a passenger service call?
Blue
What happens to the cabin interphone crew call light when the receiving station handset is removed from the cradle?
It extinguishes
Which of the following events does not trigger a Master Call Light?
Waste tank full or inoperative
What is the purpose of the chime annunciations in the Master Call Light system?
To provide an auditory cue for calls
Where are Master Call Light panels typically located in the cabin?
Near cabin crew stations and some galleys
What is the purpose of the All Call (55) feature on the Master Call Light panel?
To initiate a call from the flight deck to all cabin crew stations
What is the visual indication of a lavatory service call on the Master Call Light panel?
A steady amber light
Study Notes
Master Call Light Panel
- Provides cabin crew with visual indication of initiated calls or events requiring attention
- Located throughout the cabin near cabin crew stations and some galleys
Call Initiation
- Calls can initiate from flight deck, cabin crew stations, passenger seats, or lavatories
Call Indicators
- Cabin interphone call lights and attendant station chime annunciations used as call indicators at receiving location
- Some call types cause call light to flash
- Cabin interphone crew call light extinguishes when receiving station handset is removed from cradle
Master Call Light and Chime Definitions
- All Call (55): pink light (flash) with Hi/Lo Chime
- Attendant All Call (54): pink light (flash) with Hi/Lo Chime
- Attendant to Attendant: pink light (steady) with Hi/Lo Chime
- Crew Rest Smoke: amber light (flash) with Hi/Lo Chime (continuous)
- Attendant Alert (Waste Tank Full or Inoperative): no light or chime
- Lavatory Service Call: amber light (steady) with Hi Chime
- Lavatory Smoke: amber light (flash) with Hi/Lo Chime (continuous)
- Passenger Service Call: blue light (steady) with Hi Chime
Call Light Illumination
- Amber Master call light (MCL) illuminates:
- Steady: Lavatory service call
- Flash: Lavatory smoke
- Blue attendant call light illuminates:
- At Master Call Light panel (MCL)
- At Passenger service unit (PSU)
Master Call Light panels are used in aircraft cabins to indicate calls or events that require attention from cabin crew. They are located throughout the cabin and use call lights and chime annunciations as indicators.
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