DOC AIRBUS | AMM A320FCARGO COMPARTMENT SMOKE DETECTION - DESCRIPTION AND OPERATION
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1. General
The cargo-compartment smoke-detection system is installed in the cargo compartment. It gives a visual and aural warning in the cockpit, if smoke or fire is in the compartment. It is a dual loop system to prevent incorrect warnings. Four smoke detectors are installed in the FWD compartment and six smoke detectors in the AFT, with an AND-logic. The system Includes:
- the smoke detectors,
- the smoke annunciator lights and a TEST pushbutton switch,
- Smoke Detection Control Unit (SDCU).
Indications are shown on the Electronic Centralized Aircraft Monitoring (ECAM) upper display unit.
The cargo-compartment smoke-detection system is installed in the cargo compartment. It gives visual and aural warnings in the cockpit, if smoke is detected in the cargo compartment. Two smoke detectors are installed in the forward compartment and four smoke detectors in the aft. The system includes:
- The smoke detectors,
- The smoke annunciator lights and a TEST pushbutton switch,
- Smoke Detection Control-Unit (SDCU).
Indications are shown on the Electronic Centralized Aircraft-Monitoring (ECAM) upper display unit.
The cargo-compartment smoke-detection system is installed in the cargo compartment. It gives visual and aural warnings in the cockpit, if smoke is detected in the cargo compartment. Four smoke detectors are installed in the forward cargo compartment and six smoke detectors in the aft cargo compartment.
The system includes:
** ON A/C NOT FOR ALL The cargo-compartment smoke-detection system is installed in the cargo compartment. It gives a visual and aural warning in the cockpit, if smoke or fire is in the compartment. It is a dual loop system to prevent incorrect warnings. Four smoke detectors are installed in the FWD compartment and six smoke detectors in the AFT, with an AND-logic. The system Includes:
- the smoke detectors,
- the smoke annunciator lights and a TEST pushbutton switch,
- Smoke Detection Control Unit (SDCU).
Indications are shown on the Electronic Centralized Aircraft Monitoring (ECAM) upper display unit.
The cargo-compartment smoke-detection system is installed in the cargo compartment. It gives visual and aural warnings in the cockpit, if smoke is detected in the cargo compartment. Two smoke detectors are installed in the forward compartment and four smoke detectors in the aft. The system includes:
- The smoke detectors
- The smoke annunciator lights and a TEST pushbutton switch
- The Smoke Detection Function of the Cabin Intercommunication Data System (CIDS-SDF).
- Indications will be given on the ECAM upper display unit and smoke warning lights on the overhead panel.
- The smoke detectors,
- The smoke annunciator lights and a TEST pushbutton switch,
- Smoke Detection Control-Unit (SDCU).
Indications are shown on the Electronic Centralized Aircraft-Monitoring (ECAM) upper display unit.
The cargo-compartment smoke-detection system is installed in the cargo compartment. It gives visual and aural warnings in the cockpit, if smoke is detected in the cargo compartment. Four smoke detectors are installed in the forward cargo compartment and six smoke detectors in the aft cargo compartment.
The system includes:
- The smoke detectors
- The smoke annunciator lights and a TEST pushbutton switch
- The Smoke Detection Function of the Cabin Intercommunication Data-System (CIDS-SDF).
2. Component Location
Cargo Compartment Smoke-Detection - Component Location (Sheet1) ** ON A/C NOT FOR ALL
Cargo Compartment Smoke-Detection - Component Location (Sheet1) ** ON A/C NOT FOR ALL
Cargo Compartment Smoke-Detection - Component Location (Sheet1) ** ON A/C NOT FOR ALL
Cargo Compartment Smoke-Detection - Component Location (Sheet1) ** ON A/C NOT FOR ALL
Cargo-Compartment Fire-Extinguishing - Component Location (Sheet2) ** ON A/C NOT FOR ALL
Cargo-Compartment Fire-Extinguishing - Component Location (Sheet2) ** ON A/C NOT FOR ALL
Cargo-Compartment Fire-Extinguishing - Component Location (Sheet2) ** ON A/C NOT FOR ALL
** ON A/C NOT FOR ALL Cargo Compartment Smoke-Detection - Component Location (Sheet1) ** ON A/C NOT FOR ALL Cargo Compartment Smoke-Detection - Component Location (Sheet1) ** ON A/C NOT FOR ALL Cargo Compartment Smoke-Detection - Component Location (Sheet1) ** ON A/C NOT FOR ALL Cargo Compartment Smoke-Detection - Component Location (Sheet1) ** ON A/C NOT FOR ALL Cargo-Compartment Fire-Extinguishing - Component Location (Sheet2) ** ON A/C NOT FOR ALL Cargo-Compartment Fire-Extinguishing - Component Location (Sheet2) ** ON A/C NOT FOR ALL Cargo-Compartment Fire-Extinguishing - Component Location (Sheet2) ** ON A/C NOT FOR ALL | FIN | FUNCTIONAL DESIGNATION | PANEL | ZONE | ACCESS DOOR | ATA REF |
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| 1WH | DET-SMOKE, CARGO COMPT | 130 | 26-16-15 | ||
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| 1WH | DET-SMOKE, CARGO COMPT | 131 | 26-16-15 | ||
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| 2WH | DET-SMOKE, CARGO COMPT | 130 | 26-16-15 | ||
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| 2WH | DET-SMOKE, CARGO COMPT | 132 | 26-16-15 | ||
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| 3WH | DET-SMOKE, CARGO COMPT | 130 | 26-16-15 | ||
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| 3WH | DET-SMOKE, CARGO COMPT | 151 | 26-16-15 | ||
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| 3WH | DET-SMOKE, CARGO COMPT | 131 | 26-16-15 | ||
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| 4WH | DET-SMOKE, CARGO COMPT | 130 | 26-16-15 | ||
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| 4WH | DET-SMOKE, CARGO COMPT | 152 | 26-16-15 | ||
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| 4WH | DET-SMOKE, CARGO COMPT | 132 | 26-16-15 | ||
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| 5WH | DET-SMOKE, CARGO COMPT | 150 | 26-16-15 | ||
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| 5WH | DET-SMOKE, CARGO COMPT | 161 | 26-16-15 | ||
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| 6WH | DET-SMOKE, CARGO COMPT | 160 | 26-16-15 | ||
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| 6WH | DET-SMOKE, CARGO COMPT | 162 | 26-16-15 | ||
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| 7WH | DET-SMOKE, CARGO COMPT | 150 | 26-16-15 | ||
| 8WH | DET-SMOKE, CARGO COMPT | 150 | 26-16-15 | ||
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| 9WH | DET-SMOKE, CARGO COMPT | 150 | 26-16-15 | ||
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| 9WH | DET-SMOKE, CARGO COMPT | 160 | 26-16-15 | ||
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| 10WQ | SDCU | 94VU | 120 | 26-17-34 | |
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| 10WH | DET-SMOKE, CARGO COMPT | 150 | 26-16-15 | ||
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| 10WH | DET-SMOKE, CARGO COMPT | 160 | 26-16-15 | ||
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| 11WH | ANN-CARGO SMOKE/FWD | 22VU | 212 | 26-16-00 | |
| 12WH | ANN-CARGO SMOKE/AFT | 22VU | 212 | 26-16-00 | |
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| 13WH | P/BSW-CARGO SMOKE/TEST | 22VU | 212 | 26-16-00 | |
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| 16WH | PUSHBUTTON SWITCH-TEST | 22VU | 212 | 26-16-00 | |
3. System Description
A. Smoke Detector
The smoke detectors 1WH, 2WH, 3WH, 4WH, 5WH and 6WH ionize the air particles that pass between their electrodes. As smoke has a higher specific gravity than air, it causes the electrical resistance of the circuit to increase. The current decreases and the voltage in the measurement chamber increases to a higher level than the reference chamber. At a set difference level the detector sends a signal. The reference chamber makes allowances for differential pressure. It makes sure that the detector operates on the ground and in flight within the same level of sensitivity.
The smoke detectors 1WH, 2WH, 3WH, 4WH, 5WH and 6WH operate on the principle of scattered light. The light source, the labyrinth and the photocell are set out in a horizontal plane so that the photocell cannot receive direct light. But when there is smoke, the smoke particles reflect and scatter a part of the light beam. The photocell receives this light and gives an analog signal that sets off the alarm.
The smoke detectors 1WH, 2WH, 3WH, 4WH, 5WH, 6WH, 7WH, 8WH, 9WH and 10WH operates on the principle of reverse scattered light. The light source, the labyrinth and the photocell are set out in a horizontal plane so that the photocell cannot receive light. But when there is smoke, the smoke particles reflect and scatter backward a part of the light beam. The photocell receives this light and gives an analog signal and sets off the alarm.
The smoke detectors 1WH, 2WH, 3WH, 4WH, 5WH and 6WH operates on the principle of reverse scattered light. The light source, the labyrinth and the photocell are set out in a horizontal plane so that the photocell cannot receive light. But when there is smoke, the smoke particles reflect and scatter backward a part of the light beam. The photocell receives this light and gives an analog signal and sets off the alarm.
The smoke detectors 1WH, 2WH, 3WH, 4WH, 5WH, 6WH, 7WH, 8WH, 9WH and 10WH operate on the principle of scattered light. The light source, the labyrinth and the photocell are set out in a horizontal plane so that the photocell cannot receive direct light. But when there is smoke, the smoke particles reflect and scatter a part of the light beam. The photocell receives this light and gives an analog signal that sets off the alarm.
The smoke detectors 1WH, 2WH, 3WH, 4WH, 5WH and 6WH operates on the principle of scattered light. The light source, the labyrinth and the photocell are located in a horizontal plane so that the photocell cannot receive light. But when there is smoke, the smoke particles reflect and scatter a part of the light beam. The photocell receives this light and gives an analog signal and starts the alarm.
The smoke detectors 1WH, 2WH, 3WH, 4WH, 5WH and 6WH ionize the air particles that pass between their electrodes. As smoke has a higher specific gravity than air, it causes the electrical resistance of the circuit to increase. The current decreases and the voltage in the measurement chamber increases to a higher level than the reference chamber. At a set difference level the detector sends a signal. The reference chamber makes allowances for differential pressure. It makes sure that the detector operates on the ground and in flight within the same level of sensitivity.
The smoke detectors 1WH, 2WH, 3WH, 4WH, 5WH and 6WH operate on the principle of scattered light. The light source, the labyrinth and the photocell are set out in a horizontal plane so that the photocell cannot receive direct light. But when there is smoke, the smoke particles reflect and scatter a part of the light beam. The photocell receives this light and gives an analog signal that sets off the alarm.
The smoke detectors 1WH, 2WH, 3WH, 4WH, 5WH, 6WH, 7WH, 8WH, 9WH and 10WH operates on the principle of reverse scattered light. The light source, the labyrinth and the photocell are set out in a horizontal plane so that the photocell cannot receive light. But when there is smoke, the smoke particles reflect and scatter backward a part of the light beam. The photocell receives this light and gives an analog signal and sets off the alarm.
The smoke detectors 1WH, 2WH, 3WH, 4WH, 5WH and 6WH operates on the principle of reverse scattered light. The light source, the labyrinth and the photocell are set out in a horizontal plane so that the photocell cannot receive light. But when there is smoke, the smoke particles reflect and scatter backward a part of the light beam. The photocell receives this light and gives an analog signal and sets off the alarm.
The smoke detectors 1WH, 2WH, 3WH, 4WH, 5WH, 6WH, 7WH, 8WH, 9WH and 10WH operate on the principle of scattered light. The light source, the labyrinth and the photocell are set out in a horizontal plane so that the photocell cannot receive direct light. But when there is smoke, the smoke particles reflect and scatter a part of the light beam. The photocell receives this light and gives an analog signal that sets off the alarm.
The smoke detectors 1WH, 2WH, 3WH, 4WH, 5WH and 6WH operates on the principle of scattered light. The light source, the labyrinth and the photocell are located in a horizontal plane so that the photocell cannot receive light. But when there is smoke, the smoke particles reflect and scatter a part of the light beam. The photocell receives this light and gives an analog signal and starts the alarm.
B. Smoke Annunciator Light
A FWD SMOKE annunciator light 11WH and an AFT SMOKE annunciator light 12WH are installed on the cargo smoke panel 22VU. When any set of smoke detectors operate, they transmit a warning signal to the SDCU 10WQ. The SDCU through two ARINC 429 buses independently control the warning outputs to the Flight Warning Computers (FWC). The related SMOKE annunciator light comes on.
A FWD SMOKE annunciator light 11WH and an AFT SMOKE annunciator light 12WH are installed on the cargo smoke panel 22VU. When smoke is detected the smoke detector transmits a signal to the CIDS-SDF through a Controller Area Network (CAN) bus. The CIDS-SDF sends the related output and the SMOKE annunciator light comes on.
A FWD SMOKE annunciator light 11WH and an AFT SMOKE annunciator light 12WH are installed on the cargo smoke panel 22VU. When any set of smoke detectors operate, they transmit a warning signal to the SDCU 10WQ. The SDCU through two ARINC 429 buses independently control the warning outputs to the Flight Warning Computers (FWC). The related SMOKE annunciator light comes on.
A FWD SMOKE annunciator light 11WH and an AFT SMOKE annunciator light 12WH are installed on the cargo smoke panel 22VU. When any set of smoke detectors operate, they transmit a warning signal to the SDCU 10WQ. The SDCU through two ARINC 429 buses independently control the warning outputs to the Flight Warning Computers (FWC). The related SMOKE annunciator light comes on.
A FWD SMOKE annunciator light 11WH and an AFT SMOKE annunciator light 12WH are installed on the cargo smoke panel 22VU. When any set of smoke detectors operate, they transmit a warning signal to the SDCU 10WQ. The SDCU through two ARINC 429 buses independently control the warning outputs to the Flight Warning Computers (FWC). The related SMOKE annunciator light comes on.
A FWD SMOKE annunciator light 11WH and an AFT SMOKE annunciator light 12WH are installed on the cargo smoke panel 22VU. When smoke is detected the smoke detector transmits a signal to the CIDS-SDF through a Controller Area Network (CAN) bus. The CIDS-SDF sends the related output and the SMOKE annunciator light comes on.
A FWD SMOKE annunciator light 11WH and an AFT SMOKE annunciator light 12WH are installed on the cargo smoke panel 22VU. When any set of smoke detectors operate, they transmit a warning signal to the SDCU 10WQ. The SDCU through two ARINC 429 buses independently control the warning outputs to the Flight Warning Computers (FWC). The related SMOKE annunciator light comes on.
A FWD SMOKE annunciator light 11WH and an AFT SMOKE annunciator light 12WH are installed on the cargo smoke panel 22VU. When any set of smoke detectors operate, they transmit a warning signal to the SDCU 10WQ. The SDCU through two ARINC 429 buses independently control the warning outputs to the Flight Warning Computers (FWC). The related SMOKE annunciator light comes on.
C. Press-to-Test (PTT) Pushbutton Switch
The PTT pushbutton switch 13WH together with the SDCU, permits a functional test of the cargo smoke detection system. The PTT pushbutton switch is installed between the smoke annunciator lights on the cargo smoke panel 22VU.
The (PTT) pushbutton switch 13WH together with the CIDS-SDF, permits an operational test of the cargo-compartment smoke-detection system. The PTT pushbutton switch is installed between the smoke annunciator lights on the cargo smoke panel 22VU.
The (PTT) pushbutton switch 13WH together with the SDCU, permits a functional test of the cargo smoke detection system. The (PTT) pushbutton switch is installed between the smoke annunciator lights on the cargo smoke panel 22VU.
The (PTT) pushbutton switch 13WH together with the CIDS-SDF, permits an operational test of the cargo-compartment smoke-detection system. The PTT pushbutton switch is installed between the smoke annunciator lights on the cargo smoke panel 22VU.
The PTT push button switch 16WH, together with the CIDS-SDF, starts an operational test of the cargo-compartment smoke-detection system. The PTT-button is installed between the smoke annunciator lights on the cargo smoke panel 22VU.
The PTT pushbutton switch 16WH, together with the CIDS-SDF, starts an operational test of the cargo-compartment smoke-detection system. The PTT pushbutton switch is installed between the smoke annunciator lights on the cargo smoke panel 22VU.
The PTT pushbutton switch 16WH, together with the SDCU, starts an operational test of the cargo-compartment smoke-detection system. The PTT pushbutton switch is installed between the smoke annunciator lights on cargo smoke panel 22VU.
The PTT pushbutton switch 13WH together with the SDCU, permits a functional test of the cargo smoke detection system. The PTT pushbutton switch is installed between the smoke annunciator lights on the cargo smoke panel 22VU.
The (PTT) pushbutton switch 13WH together with the CIDS-SDF, permits an operational test of the cargo-compartment smoke-detection system. The PTT pushbutton switch is installed between the smoke annunciator lights on the cargo smoke panel 22VU.
The (PTT) pushbutton switch 13WH together with the SDCU, permits a functional test of the cargo smoke detection system. The (PTT) pushbutton switch is installed between the smoke annunciator lights on the cargo smoke panel 22VU.
The (PTT) pushbutton switch 13WH together with the CIDS-SDF, permits an operational test of the cargo-compartment smoke-detection system. The PTT pushbutton switch is installed between the smoke annunciator lights on the cargo smoke panel 22VU.
The PTT push button switch 16WH, together with the CIDS-SDF, starts an operational test of the cargo-compartment smoke-detection system. The PTT-button is installed between the smoke annunciator lights on the cargo smoke panel 22VU.
The PTT pushbutton switch 16WH, together with the CIDS-SDF, starts an operational test of the cargo-compartment smoke-detection system. The PTT pushbutton switch is installed between the smoke annunciator lights on the cargo smoke panel 22VU.
The PTT pushbutton switch 16WH, together with the SDCU, starts an operational test of the cargo-compartment smoke-detection system. The PTT pushbutton switch is installed between the smoke annunciator lights on cargo smoke panel 22VU.
D. Smoke Detection Control
The smoke detection control unit (SDCU) 10WQ controls the lavatory and cargo-compartment smoke-detection system. The SDCU Built-In Test Equipment (BITE) controls and monitors the systems and interfaces with the Centralized Fault Display System (CFDS). It records the unsatisfactory components and system malfunctions (Ref. AMM D/O 26-17-00-00).
The CIDS-SDF 101RH and 102RH controls the smoke detection system. The Built-In Test Equipment (BITE) controls and monitors the detectors and interfaces with the Centralized Fault Display System (CFDS). It records the unsatisfactory components and system malfunctions.
The smoke detection control unit (SDCU) 10WQ controls the lavatory and cargo-compartment smoke-detection system. The SDCU Built-In Test Equipment (BITE) controls and monitors the systems and interfaces with the Centralized Fault Display System (CFDS). It records the unsatisfactory components and system malfunctions (Ref. AMM D/O 26-17-00-00).
The smoke detection control unit (SDCU) 10WQ controls the lavatory and cargo-compartment smoke-detection system. The SDCU Built-In Test Equipment (BITE) controls and monitors the systems and interfaces with the Centralized Fault Display System (CFDS). It records the unsatisfactory components and system malfunctions (Ref. AMM D/O 26-17-00-00).
The CIDS-SDF 101RH and 102RH controls the smoke-detection system. The Built-In Test Equipment (BITE) controls and monitors the detectors and interfaces with the Centralized Fault Display System (CFDS). It records the unsatisfactory components and system malfunctions.
The smoke detection control unit (SDCU) 10WQ controls the lavatory and cargo-compartment smoke-detection system. The SDCU Built-In Test Equipment (BITE) controls and monitors the systems and interfaces with the Centralized Fault Display System (CFDS). It records the unsatisfactory components and system malfunctions (Ref. AMM D/O 26-17-00-00).
The CIDS-SDF 101RH and 102RH controls the smoke detection system. The Built-In Test Equipment (BITE) controls and monitors the detectors and interfaces with the Centralized Fault Display System (CFDS). It records the unsatisfactory components and system malfunctions.
The smoke detection control unit (SDCU) 10WQ controls the lavatory and cargo-compartment smoke-detection system. The SDCU Built-In Test Equipment (BITE) controls and monitors the systems and interfaces with the Centralized Fault Display System (CFDS). It records the unsatisfactory components and system malfunctions (Ref. AMM D/O 26-17-00-00).
The smoke detection control unit (SDCU) 10WQ controls the lavatory and cargo-compartment smoke-detection system. The SDCU Built-In Test Equipment (BITE) controls and monitors the systems and interfaces with the Centralized Fault Display System (CFDS). It records the unsatisfactory components and system malfunctions (Ref. AMM D/O 26-17-00-00).
The CIDS-SDF 101RH and 102RH controls the smoke-detection system. The Built-In Test Equipment (BITE) controls and monitors the detectors and interfaces with the Centralized Fault Display System (CFDS). It records the unsatisfactory components and system malfunctions.
4. Operation/Control and Indicating
Cargo Compartment Smoke-Detection - Schematic ** ON A/C NOT FOR ALL
Cargo Compartment Smoke-Detection - Schematic ** ON A/C NOT FOR ALL
Cargo Compartment Smoke-Detection - Schematic ** ON A/C NOT FOR ALL
Cargo Compartment Smoke-Detection - Schematic ** ON A/C NOT FOR ALL
Cargo Compartment Smoke-Detection - Schematic ** ON A/C NOT FOR ALL Cargo Compartment Smoke-Detection - Schematic ** ON A/C NOT FOR ALL Cargo Compartment Smoke-Detection - Schematic ** ON A/C NOT FOR ALL Cargo Compartment Smoke-Detection - Schematic ** ON A/C NOT FOR ALL A. Normal Operation
Smoke detected in the cargo compartment will cause:
Smoke detected in the cargo compartment will cause:
Smoke detected in the cargo compartment will cause:
- The related SMOKE warning light to come on
- The red light in the MASTER WARNING pushbutton switch to flash
- The aural repetitive chime to sound
- The ECAM upper display unit to show the messages:
SMOKE FWD/AFT CARGO SMOKE
ISOL VALVE (of affected compartment) ... OFF (if not automatically closed)
AGENT ... DISCH.
Smoke detected in the cargo compartment will cause:
- The related SMOKE warning light to come on
- The red light in the MASTER WARNING pushbutton switch to flash
- The aural repetitive chime to sound
- The ECAM upper display unit to show the applicable warning messages.
B. Operation with one Faulty Smoke Detector
When only one detector sends an alarm, the SDCU checks the second detector automatically. If this test shows a normal function of the second detector, the result is no indication in the cockpit. The alarm of the detector is a false warning. If this test shows an abnormal function of the second detector, the warning signals come on (Ref. Para. 4.A). The alarm of the first detector is the correct warning.
When only one detector sends an alarm, the CIDS-SDF checks the second detector automatically.
If this test shows a usual function of the second detector, there is no indication in the cockpit. The alarm of the first detector is an incorrect warning.
If this test shows an unusual function of the second detector, the warning signals come on (Ref. Para. 4.A). The alarm of the first detector is the correct warning.
When only one detector sends an alarm, the SDCU checks the second detector automatically. If this test shows a normal function of the second detector, the result is no indication in the cockpit. The alarm of the detector is a false warning. If this test shows an abnormal function of the second detector, the warning signals come on (Ref. Para. 4.A). The alarm of the first detector is the correct warning.
When only one detector sends an alarm, the CIDS-SDF checks the second detector automatically.
If this test shows a usual function of the second detector, there is no indication in the cockpit. The alarm of the first detector is an incorrect warning.
If this test shows an unusual function of the second detector, the warning signals come on (Ref. Para. 4.A). The alarm of the first detector is the correct warning.
5. Test
A. Manual Test
(1) When you press the (PTT) pushbutton switch for more than 2 seconds a test of the smoke detectors is initiated. The SDCU tests the smoke detectors automatically.
The indications are:
If a cargo ventilation system is installed, after the PTT pushbutton is pressed, the isolation valves of the cargo-compartment ventilation-system close and the extraction fan stops (Ref. 21-28-00). When the test stops, the isolation valves open and the extraction fan starts. The information is stored in the Centralized Fault Display System (CFDS).
The indications are:
- The FWD SMOKE and AFT SMOKE warning lights come on, twice for approximately 2 seconds, with a delay of approximately 5 seconds in a normal condition.
- A wiring failure on the detector's bus system,
- A failure of one SDCU channel,
- The respective SMOKE warning light does not come on, if both smoke detectors, installed in one cavity, do not operate.
If a cargo ventilation system is installed, after the PTT pushbutton is pressed, the isolation valves of the cargo-compartment ventilation-system close and the extraction fan stops (Ref. 21-28-00). When the test stops, the isolation valves open and the extraction fan starts. The information is stored in the Centralized Fault Display System (CFDS).
B. SDCU Power-up Test
(1) Conditions of Power-up Test Initialization
(a) Time that the computer must be de-energized:
- 200 milliseconds.
(b) A/C configuration:
- whatever the A/C configuration is on ground.
(2) Progress of Power-up Test
(a) Time:
- 10 seconds.
(b) Cockpit repercussions directly linked to power-up test accomplishment (some other repercussions may occur depending on the A/C configuration but these can be ignored):
- none
(3) Results of Power-up Test
(a) Test passed:
- none
(b) Test failed:
- MASTER CAUT lights come on with single chime
- ECAM warning: SMOKE LAV+CRG DET FAULT
- ECAM maintenance page: SDCU white indication
C. Manual Test
When you push the (PTT) pushbutton switch for more than 2 seconds, a test of the smoke detectors starts. The CIDS-SDF does a test of the smoke detectors automatically.
The smoke warning signals and indications come on two times.
The system also accepts the test, when the lamps come on once, this happens if one CIDS-SDF channel is unserviceable.
The related SMOKE warning light does not come on, if both smoke detectors, installed in one cavity, do not operate, and the test is unsatisfactory.
When the PTT pushbutton is pushed and the cargo ventilation system is installed, the isolation valves close and the extraction fan stops (Ref. 21-28-00). When the PTT pushbutton is released and the test stops, the isolation valves open and the extraction fan starts. The information is stored in the Centralized Fault Display System (CFDS).
When you push the (PTT) pushbutton switch for more than 2 seconds, a test of the smoke detectors starts. The CIDS-SDF does a test of the smoke detectors automatically.
The smoke warning signals and indications come on two times.
The system also accepts the test, when the lamps come on once, this happens if one CIDS-SDF channel is unserviceable.
The related SMOKE warning light does not come on, if both smoke detectors, installed in one cavity, do not operate, and the test is unsatisfactory.
When the PTT pushbutton is pushed and the cargo ventilation system is installed, the isolation valves close and the extraction fan stops (Ref. 21-28-00). When the PTT pushbutton is released and the test stops, the isolation valves open and the extraction fan starts. The information is stored in the Centralized Fault Display System (CFDS).
D. Smoke Warning Test
With the aircraft on the ground, SMOKE WARN TESTS can be selected on the SDCU or SMOKE menu of the MCDU. A submenu with SMK DET FWD LDCC TEST and (or) SMK DET AFT LDCC TEST is shown on the display. A test for the forward cargo-compartment smoke-detectors or for the aft cargo smoke detectors can be selected by the line key.
During the test the CIDS-SDF sends a test signal to the cargo-compartment smoke-detectors through the CAN bus. If the applicable smoke detectors are operative they transmit a test-alarm signal to the CIDS-SDF and the cockpit indications (SMOKE warning light, chime and master warning, ECAM message) come on. The test finishes when all indications are confirmed or when the MCDU line key RETURN is selected.
If a cargo ventilation system is installed, the isolation valves are in the open position before the test starts. The valves close when the SMOKE condition is simulated. The valves remain in the closed position. After a reset of the ventilation controller the isolation valves open again.
With the aircraft on the ground, SMOKE WARN TESTS can be selected on the SDCU or SMOKE menu of the MCDU. A submenu with SMK DET FWD LDCC TEST and (or) SMK DET AFT LDCC TEST is shown on the display. A test for the forward cargo-compartment smoke-detectors or for the aft cargo smoke detectors can be selected by the line key.
During the test the CIDS-SDF sends a test signal to the cargo-compartment smoke-detectors through the CAN bus. If the applicable smoke detectors are operative they transmit a test-alarm signal to the CIDS-SDF and the cockpit indications (SMOKE warning light, chime and master warning, ECAM message) come on. The test finishes when all indications are confirmed or when the MCDU line key RETURN is selected.
If a cargo ventilation system is installed, the isolation valves are in the open position before the test starts. The valves close when the SMOKE condition is simulated. The valves remain in the closed position. After a reset of the ventilation controller the isolation valves open again.