ANCILLARY EQUIPMENT - DESCRIPTION AND OPERATION

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1. General

A. Stowage

There are different stowage devices for the ancillary equipment.
The stowage devices are installed at different locations in the cabin.

B. Door Area Heating System
The heated floor panels increase the temperature of the floor in some areas to give more comfort to the crew and the passengers.

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2. Component Location

A. Stowage
For the location of this component, refer to paragraph Component Location
(Ref. AMM D/O 25-00-00-00).

Stowages - Component Location ** ON A/C NOT FOR ALL

FIN	FUNCTIONAL DESIGNATION	ZONE	ATA REF
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6389MM	PARTITION LH	242	25-26-42
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6480MM	GALLEY LOC.III	200	25-33-42
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6579MM	STOWAGE LH	200	25-27-44
6580MM	STOWAGE RH	200	25-27-44
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6581MM	STOWAGE (LAV A) LH	200	25-10-00
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6575MM	STOWAGE FORWARD LH	200	25-27-44
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6576MM	STOWAGE FORWARD RH	200	25-27-44
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6593MM	STOWAGE RH	200	25-27-44
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6578MM	STOWAGE REAR RH	200	25-27-44
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6600MM	DOGHOUSE RH	200	25-10-00
6601MM	DOGHOUSE LH	200	25-10-00

Stowages - Component Location ** ON A/C NOT FOR ALL

B. Heated Floor Panels

Heated Floor Panel System - Emergency Exits - Component Location ** ON A/C NOT FOR ALL

Heated Floor Panel System - FWD Door Area - Component Location ** ON A/C NOT FOR ALL

Heated Floor Panel System - FWD Door and Emergency Exit Door Area - Component Location ** ON A/C NOT FOR ALL

FIN	FUNCTIONAL DESIGNATION	PANEL	ZONE	ATA REF
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4DS	CTL UNIT-DOOR AREA HEATING	132JW	132	25-27-34
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14DS	CTL UNIT-DOOR AREA HEATING	152FW	152	25-27-34
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5DS	FLOOR PANEL-HEAT.,DOOR AREA		241	25-27-51
6DS	FLOOR PANEL-HEAT.,DOOR AREA		242	25-27-51
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15DS	FLOOR PANEL-HEAT.,DOOR AREA		251	25-27-51
16DS	FLOOR PANEL-HEAT.,DOOR AREA		252	25-27-51
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60DS	CTL UNIT-DOOR AREA HEATING		122	25-27-00
66DS	CTL UNIT-DOOR AREA HEATING		122	25-27-00
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30DS	HEATER A-FLOOR PANEL,DOOR 1 RH		126	25-27-51
31DS	HEATER A-FLOOR PANEL,DOOR 1 LH		125	25-27-51
32DS	HEATER B-FLOOR PANEL,DOOR 1 RH		126	25-27-51
33DS	HEATER B-FLOOR PANEL,DOOR 1 LH		125	25-27-51

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3. System Description

A. Stowage

The stowage basic structure is made from sandwich panels. The sandwich panels are covered with Glassfibre Reinforced Plastic (GFRP) plates. Extrusions are bonded and/or riveted to the panels. Bonded edge profiles, stainless-steel kick strips and rub strips are installed to protect the stowage where applicable. The stowage are attached to the seat tracks with fittings and to the aircraft structure with tie-rods.

B. Emergency Equipment Stowage
The basic structure of the emergency equipment stowage is made from sandwich panels. The sandwich panels are covered with glassfibre-reinforced-plastic plates.
Usually, the emergency equipment stowage is attached to the cabin-attendent seat with screws.

C. Heated Floor Panel System

Heated Floor-Panel System - Door 1 Area - Schematic ** ON A/C NOT FOR ALL

Heated Floor-Panel System - Door 2 and 3 Area - Schematic ** ON A/C NOT FOR ALL

Heated Floor-Panel System - Door 3 Area - Schematic ** ON A/C NOT FOR ALL

(1) General
The heated floor panels increase the temperature in areas of the cabin which are much colder than other areas in the cabin.

(2) System Architecture
The heated floor panel system has:

Heated floor panels
Control units.

(3) Description
The heated floor panel system operates when:

The circuit breakers of the system are closed.
The galley supply system operates (Ref. AMM D/O 24-56-00-00).

The heated floor panels:

Have sensors which measure constantly the temperature of the panels.
Are connected to the control units.
Give data of the measured temperature to the control units.

The control units:

Supplies electrical power to the heated floor panels if the temperature is less than a given temperature.
Removes the electrical power supply from the heated floor panels if the temperature is more than a given temperature.

(4) Description
The heated floor panel system operates when:

The circuit breakers of the system are closed.
The galley supply system operates (Ref. AMM D/O 24-56-00-00).
It is possible to deactivate the heated floor panels in the forward utility area via the page "cabin temperature" on the flight attandant panel (Ref. AMM D/O 23-73-00-00).

The heated floor panels:

Have sensors which measure constantly the temperature of the panels.
Are connected to the control units.
Give data of the measured temperature to the control units.

The control units:

Supplies electrical power to the heated floor panels if the temperature is less than a given temperature.
Removes the electrical power supply from the heated floor panels if the temperature is more than a given temperature.

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4. Power Supply

A. Heated Floor Panel System
The heated floor panels are supplied with 115 VAC from the busbars 212XP and 214XP through the circuit breakers:

1DS
11DS

The heated floor panels are supplied with 115 VAC from the busbar 214XP through the circuit breakers:

51DS
52DS

The heated floor panels are supplied with 115 VAC from the busbars 212XP and 214XP through the circuit breakers:

1DS
11DS
51DS
52DS

The heated floor panels are supplied with 115 VAC from the busbars 212XP and 214XP through the circuit breakers:

11DS
51DS
52DS

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5. Interface

A. The heated floor panel system has an interface with the galley supply (Ref. 24-56-00).
The control unit(s) of the heated floor panel system are supplied with a discrete 28 VDC signal from a contactor of the galley supply system.
The signal lets the control unit operate to supply the connected heated floor panel(s) with electrical power.
When the galley supply system is not operating or in shed mode, the contactor de-energizes and cuts-off the 28 VDC signal to the control unit.
The control unit removes the power supply from the heated floor panel(s).

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6. Component Description

A. Heated Floor Panel FIN: 5-DS FIN: 6-DS FIN: 15-DS FIN: 16-DS FIN: 30-DS FIN: 31-DS FIN: 32-DS FIN: 33-DS

(1) General
The heated floor panel is made of composite material. It has heating element(s) to heat the surface of the panel.

(2) Components
The heated floor panel has:

A heating foil which is protected with an aluminium outer cover plate
Insulation material to keep the temperature of the heating foil
Drain holes to drain fluid
A sensor to measure the temperature of the heating foil
One overtemperature thermostat
One self-locking overtemperature thermostat.

(3) Operation
If a control unit has a malfunction and supplies constant power to a heated floor panel, the overtemperature thermostat operates.
The overtemperature thermostat operates at approximately 35 deg.C (95.00 deg.F) and 65 deg.C (149.00 deg.F).
If the heated floor panel temperature increases more than 80 deg.C (176.00 deg.F) the self-locking overtemperature thermostat will stop the power supply to the heated floor panel.

B. Control Unit

(1) General
The control unit controls and monitors the heated floor panel(s).

(2) Components
The control unit has:

Circuit breaker(s) and/or fuse(s)
The circuit breaker(s) and/or fuse(s) protect(s) the power supply to the heated floor panel(s).
Test pushbutton(s)
When you push the test pushbutton(s), you start a BITE test of the control unit.
Indicator(s)
The indicator(s) come(s) on when the BITE test is satisfactory.

(3) Interface
The control unit has a discrete 28 VDC interface with:

The galley supply (Ref. AMM D/O 24-56-00-00).

(4) Interface
The control unit has a discrete 28 VDC interface with:

The galley supply (Ref. AMM D/O 24-56-00-00).
The cabin-intercommunication data system (Ref. AMM D/O 23-73-00-00).

(5) Operation
The control units 4DS and 14DS supply electrical power to the heated floor panel(s) at door2 and door3:

When a sensor of a heated floor panel senses a temperature less than 29 deg.C (84.20 deg.F).
The control unit removes the power supply from the heated floor panel(s):
When a sensor of a heated floor panel senses a temperature more than 32 deg.C (89.60 deg.F).

(6) Operation
The control unit 14DS supplies electrical power to the heated floor panel(s) at door 3:

When a sensor of a heated floor panel senses a temperature less than 29 deg.C (84.20 deg.F).
The control unit removes the power supply from the heated floor panel(s):
When a sensor of a heated floor panel senses a temperature more than 32 deg.C (89.60 deg.F).

(7) Operation
The control units 60DS and 66DS supply electrical power to the heated floor panel(s) at door 1 LH/RH:

When a sensor of a heated floor panel senses a temperature less than 42 deg.C (107.60 deg.F).
The control unit removes the power supply from the heated floor panel(s):
When a sensor of a heated floor panel senses a temperature more than 45 deg.C (113.00 deg.F).

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7. Operation/Control and Indicating

A. Heated Floor Panel System

(1) General
The heated floor panel system operates automatically when:

The galley supply system operates.
The circuit breaker(s) of the heated floor panel system are closed.

(2) Operation
The operation of the system depends on the environmental temperature. The heated floor panels operate automatically when the sensors of the panel sense a temperature which is much colder than the temperature in the cabin.

(3) Operation
The operation of the system depends on the environmental temperature. The heated floor panels operate automatically when the sensors of the panel sense a temperature which is much colder than the temperature in the cabin.
It is possible to deactivate the heated floor panels in the forward utility area via the page "cabin temperature" on the flight attendant panel.

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8. BITE Test

A. Heated Floor Panel System

(1) General
Each control unit has a BITE. The BITE starts and operates when you push and hold the test button on the control unit.

(2) Tests
The self- test does a check of:

The internal logic of the control unit.
The connected heated floor panel temperature sensor(s) and heating element(s).

(3) Indications
If the test is ok:

The test indicators come on.

If there is a failure:

One or all test indicators do not come on.

[Rev.10 from 2021] 2026.04.01 06:00:26 UTC