*
CSS configuration data base (defines the smoking/no
smoking areas)
*
Smoking assignments CSCP/CACP screen (cabin attendant adjustments to smoking/no smoking areas)
*
The condition of the passenger oxygen system (deployed or not deployed)
*
Landing gear position
*
Flap lever position
*
Airplane altitude
*
Cabin pressure altitude.
The on/off signals go the same way as the off and on modes.
Training Information Point
You use the configuration database to change the airplane altitude at which the fasten seat belt lights come on. You can also use it to change the chime.
You can use the smoking assignments screen on the CSCP or CACP to make temporary changes to the size of the smoking/no smoking areas.
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INFORMATION SIGNS -FUNCTIONAL DESCRIPTION -INTRODUCTION
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INFORMATION SIGNS -FUNCTIONAL DESCRIPTION -CONTROL LOGIC
General
The passenger address/cabin interphone (PA/CI) controller controls the information signs. It gets information from these units on the left systems ARINC 629 bus:
*
Airplane information management system (AIMS): airplane altitude and cabin pressure data
*
Electrical load management system (ELMS): passenger oxygen deployed signals
*
Flap/slat electronics unit (FSEU): flap handle position data
*
Overhead panel ARINC 629 system (OPAS): no smoking and seat belts selectors position data
*
Proximity sensor electronics unit (PSEU): landing gear position data.
If the PA/CI fails, the cabin system management unit (CSMU) controls the information signs. The CSMU uses the same data from the right systems ARINC 629 bus.
The PA/CI controller or the CSMU sends sign on/off commands signals to the ZMUs on the intersystem (I/S) bus.
Fasten Seat Belt
The fasten seat belt signs come on when the flight crew sets the seat belts selector to ON.
With the fasten seat belts sign selector in the AUTO position, the fasten seat belt signs come on when any one of these conditions occur:
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*
Passenger oxygen is deployed
*
The landing gear is not up and locked
*
The flap lever is not in the up position
*
Airplane altitude is below the value set by the configuration database (typical value is 10,300 feet, 3142 meters)
*
Cabin pressure altitude is above 10,000 feet (3050 meters).
With the fasten seat belts sign selector in the OFF position, the fasten seat belt signs come on when the passenger oxygen is deployed.
Return to Seat
The return to seat signs come on when the passenger oxygen is not deployed and the fasten seat belts signs are on.
No Smoking
The no smoking signs come on when the flight crew sets the no smoking selector to ON.
The no smoking signs also come on when the flight crew sets the no smoking selector to AUTO and any one of these conditions occurs:
*
Passenger oxygen is deployed
*
The landing gear is not up and locked
*
Cabin pressure altitude is above 10,000 feet (3050 meters).
The no smoking signs also come on when the no smoking selector is set to off and the passenger oxygen is deployed.
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You can use the CSS configuration database to change the operation of the no smoking signs.
See the cabin services section for more information (SECTION 23-39).
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BOEING PROPRIETARY -Copyright # -Unpublished Work -See title page for details.
LAVATORY CALL LIGHTS AND MASTER CALL LIGHT MODULES -INTRODUCTION
Purpose
The light in the lavatory call switch tell the flight attendants when a person in the lavatory needs aid.
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