ident.: mo-21-09-00008895.0001001 / 28 jun 11 applicable...

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MINIMUM EQUIPMENT LIST

OPERATIONAL PROCEDURES

ATA 21 CONDITIONING

AIRBUS A320

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CAA-01 ATA 21

Minimum Equipment List A320 Copyright © 2013 Edition 0

21-09-01A VENT BLOWER FAULT Alert

Ident.: MO-21-09-00008895.0001001 / 28 JUN 11

Applicable to: ALL

DURING COCKPIT PREPARATION

Disregard the VENT BLOWER FAULT alert displayed on the EWD.

Disregard the BLOWER pb-sw FAULT light illuminated on the VENTILATION Overhead panel.

Note: If the ground horn sounds:

EIS/HORN/SPLY (121VU P09) C/B.............................................................................. Pull

The C/B must be closed again after first engine start

If the ground horn sounds after landing when engines are off, it can be silenced again. In this

case, the ADIRS must be set to OFF before leaving the aircraft.

21-09-02A VENT EXTRACT FAULT Alert

Ident.: MO-21-09-00008896.0001001 / 11 MAR 10

Applicable to: ALL


Disregard the VENT EXTRACT FAULT alert displayed on the EWD.

21-23-01A

21-23-01B Lavatory and Galley Extraction Fan

Ident.: MO-21-23-00008830.0001001 / 12 MAR 10 Applicable to: MSN 0112-0342

GENERAL INFORMATION

Two amber crosses replace the cabin zone temperature indications on the COND SD page. Refer to Item 21-07-03-01 Indications on the COND SD page

The cabin zone temperature regulation is lost. The Zone Controller commands fixed FWD and AFT cabin ducts temperature (set to 15 °C or 59 °F)

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CAA-01 ATA 21


21-23-01A

21-23-01B Lavatory and Galley Extraction Fan

Ident.: MO-21-23-00008830.0002001 / 12 MAR 10 Applicable to: MSN 0438

GENERAL INFORMATION

Two amber crosses replace the cabin zone temperature indications on the COND SD page. Refer to Item 21-07-03-01 Indications on the COND SD page

The INOP SYS column on the STATUS SD page may display the LAV DET message.

The cabin zone temperature regulation is lost. The Zone Controller commands fixed FWD and AFT cabin ducts temperature (set to 15 °C or 59 °F).

To recover the cockpit temperature regulation:

‐ HOT AIR pb-sw....................................................................................................................... OFF

‐ To control cockpit temperature, use the COCKPIT selector on the AIR COND overhead panel.

21-26-01A Avionics Blower Fan (VENT AVNCS SYS FAULT Alert not displayed)

Ident.: MO-21-26-00008831.0001001 / 20 MAR 10

Applicable to: ALL


‐ Supply the aircraft electrical network.

‐ Check that the air conditioning correctly operates with both air conditioning packs set to on.

‐ BLOWER pb-sw...................................................................................................................

OVRD

‐ Check that the VENT AVNCS SYS FAULT and VENT EXTRACT FAULT alerts are not

displayed on the EWD.

If the VENT EXTRACT FAULT alert is displayed on the EWD, the blower fan may

be seized. In that case:

‐ Contact the maintenance personnel to exchange the blower fan and the extract fan.

Only the VENT EXTRACT FAULT alert must then be displayed on the EWD.

‐ When the blower and extract fans are exchanged, Refer to Item 21-26-02 Avionics

Extract Fan.

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CAA-01 ATA 21


21-26-01B Avionics Blower Fan (Air conditioning inlet valve checked open before

each flight)

Ident.: MO-21-26-00009179.0001001 / 20 MAR 10

Applicable to: ALL




‐ BLOWER pb-sw...................................................................................................................

OVRD

‐ Check that the VENT EXTRACT FAULT alert is not displayed on the EWD

If the VENT EXTRACT FAULT alert is displayed on the EWD, the blower fan may

be seized. In that case:



‐ When the blower and extract fans are exchanged, Refer to Item 21-26-02 Avionics

Extract Fan.

21-26-01C Avionics Blower Fan (Avionics ventilation system checked before

each flight) Ident.: MO-21-26-00009180.0001001 / 20 MAR 10

Applicable to: ALL



‐ Check that air the conditioning correctly operates with both air conditioning packs set to on.

‐ BLOWER pb-sw............................................................................................................. OVRD

‐ Check that the VENT EXTRACT FAULT alert is not displayed on the EWD

After application of the maintenance procedure:

- Clear the VENT AVNCS SYS FAULT alert using the CLR pb.

The VENT AVNCS SYS FAULT alert will be displayed after landing

If the VENT EXTRACT FAULT alert is displayed on the EWD, the blower fan may be

seized. In that case:


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CAA-01 ATA 21



‐ When the blower and extract fans are exchanged, Refer to Item 21-26-02 Avionics Extract Fan.

21-26-02A Avionics Extract Fan (VENT AVNCS SYS FAULT Alert not displayed)

Ident.: MO-21-26-00009184.0001001 / 20 MAR 10

Applicable to: ALL

FLIGHT PREPARATION/LIMITATIONS

Time limitation on ground with electrical network supplied:

OAT (°C) ≤ 38 ≤ 45 ≤ 55

Max time No limit 3 h 35 min




‐ EXTRACT pb-sw................................................................................................................OVRD

‐ Clear the VENT EXTRACT FAULT alert using the CLR pb.

‐ AVNCS VENT/EXTC/FAN (123VU AE2) C/B..................................................................... Pull

‐ Check that the VENT AVNCS SYS FAULT alert is not displayed on the EWD.


EIS/HORN/SPLY (121VU P09) C/B..............................................................................

Pull


If the ground horn sounds after landing when engines are off, it can be silenced

again. In this case, the ADIRS must be set to OFF before leaving the aircraft.

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CAA-01 ATA 21


21-26-02B Avionics Extract Fan (Air conditioning inlet valve checked open

before each flight)

Ident.: MO-21-26-00009185.0001001 / 20 MAR 10

Applicable to: ALL



OAT (°C) ≤ 38 ≤ 45 ≤ 55





‐ EXTRACT pb-sw.............................................................................................................OVRD


‐ AVNCS VENT/EXTC/FAN (123VU AE2) C/B...................................................................... Pull


EIS/HORN/SPLY (121VU P09) C/B................................................................ ........... Pull


If the ground horn sounds after landing when engines are off, it can be silenced again.

In this case, the ADIRS must be set to OFF before leaving the aircraft.

21-26-02C Avionics Extract Fan (Avionics ventilation

system checked before each flight)

Ident.: MO-21-26-00008853.0001001 / 20 MAR 10

Applicable to: ALL



OAT (°C) ≤ 38 ≤ 45 ≤ 55


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CAA-01 ATA 21





‐ EXTRACT pb-sw.................................................................................................................OVRD


‐ AVNCS VENT/EXTC/FAN (123VU AE2) C/B..................................................................... Pull


- Clear the VENT AVNCS SYS FAULT alert using the CLR pb.

The VENT AVNCS SYS FAULT alert will be displayed after landing.


EIS/HORN/SPLY (121VU P09) C/B....................................................................... Pull

The C/B must be closed again after first engine start.



21-26-03A Avionics Skin Exchanger Inlet Bypass Valve

Ident.: MO-21-26-00008855.0001001 / 11 MAR 10

Applicable to: ALL

ON GROUND


Clear the VENT AVNCS SYS FAULT alert displayed on the EWD using the CLR pb.


21-26-04A Avionics Skin Air Outlet Valve

Ident.: MO-21-26-00008856.0001001 / 11 MAR 10

Applicable to: ALL

ON GROUND




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CAA-01 ATA 21


If the VENT SKIN VALVE FAULT alert is displayed on the EWD:

Apply the ECAM procedure.

Note: Avionics smoke may be not perceptible from the cockpit due to the opening of

the internal flap of the valve.

In the case of AVIONICS SMOKE alert:

Apply the ECAM procedure even if the smoke is not perceptible.

21-26-05A Avionics Skin Air Inlet Valve (Air conditioning inlet valve open on the

ground)

Ident.: MO-21-26-00009186.0001001 / 18 JUL 12

Applicable to: ALL



‐ Check that the air conditioning is operating with one or two air conditioning packs set to on.

‐ EXTRACT pb-sw...............................................................................................................OVRD

‐ Check that the skin air inlet valve is closed on the CAB PRESS SD page.

‐ Clear the VENT AVNCS SYS FAULT alert displayed on the EWD using the CLR pb.

Note: With only one air conditioning pack operative, operating time on ground is limited to 1 h.

AFTER TAKEOFF

EXTRACT pb-sw.................................................................................................................AUTO

AFTER LANDING

EXTRACT pb-sw................................................................................................................ OVRD

21-26-05B Avionics Skin Air Inlet Valve (Air conditioning inlet valve secured in the

open position)

Ident.: MO-21-26-00008857.0001001 / 18 JUL 12

Applicable to: ALL



‐ Check that the air conditioning is operating with one or two air conditioning packs set to on.

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CAA-01 ATA 21


‐ EXTRACT pb-sw.............................................................................................................OVRD

‐ Check that the skin air inlet valve is closed on the CAB PRESS SD page.




Note: With only one air conditioning pack operative, operating time on ground is limited to 1 h.

AFTER TAKEOFF

EXTRACT pb-sw..................................................................................................................AUTO

AFTER LANDING

EXTRACT pb-sw.................................................................................................................. OVRD

21-26-06A Avionics Skin Exchanger Isolation Valve

21-26-06B

Ident.: MO-21-26-00008859.0001001 / 11 MAR 10

Applicable to: ALL

ON GROUND



21-26-08A Avionics Air Conditioning Inlet Valve

Ident.: MO-21-26-00008860.0001001 / 11 MAR 10

Applicable to: ALL

ON GROUND



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CAA-01 ATA 21


21-26-09A Avionics Ventilation Filter (VENT AVNCS SYS FAULT Alert not displayed)

Ident: MO-21-26-00008861.0001001 / 11 MAR 10

Applicable to: ALL



‐ Check that the air conditioning is operating with both air conditioning packs set to on.

‐ EXTRACT pb-sw................................................................................................................OVRD

‐ Check that the VENT AVNCS SYS FAULT alert is not displayed on the EWD.

21-26-09B Avionics Ventilation Filter (Air conditioning inlet valve checked open

before each flight)

Ident.: MO-21-26-00009187.0001001 / 11 MAR 10

Applicable to: ALL




‐ EXTRACT pb-sw............................................................................................................OVRD

21-26-09C Avionics Ventilation Filter (Avionics ventilation system checked

before each flight)

Ident.: MO-21-26-00009188.0001001 / 11 MAR 10

Applicable to: ALL




‐ EXTRACT pb-sw..............................................................................................................OVRD




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CAA-01 ATA 21


21-26-10A Avionics Equipment Ventilation Computer (AEVC)

Ident.: MO-21-26-00008862.0001001 / 17 SEP 10

Applicable to: ALL



‐ Check that the conditioning is operating with both air conditioning packs set to on.

‐ BLOWER pb-sw.............................................................................................................. OVRD

‐ EXTRACT pb-sw..............................................................................................................OVRD


EIS/HORN/SPLY (121VU P09) C/B.......................................................................... Pull




Note: In the case of a low pressure in the avionics compartment ventilation ducts, the

weather radar image may not be displayed on the ND on ground.


IN FLIGHT

In the case of an air conditioning pack failure:

‐ The cabin altitude may reach about 9 700 ft (3 000 m), and

‐ The CAB PR EXCESS CAB ALT alert may be displayed on the EWD.

21-28-01A FWD Cargo Extraction Fan

Ident.: MO-21-28-00008865.0001001 / 28 JUN 11 Applicable to: MSN 0189


For live animal transportation, use the Live Animal Transportation Calculation Tool.

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CAA-01 ATA 21


21-28-02A FWD Cargo Isolation Valve (Valves checked closed)

Ident.: MO-21-28-00008867.0001001 / 28 JUN 11 Applicable to: MSN 0189




‐ ANN LT selector.................................................................................................................TEST ‐ Check that the FWD ISOL VALVE pb-sw FAULT light comes on ‐ ANN LT selector...................................................................................................... BRT or DIM ‐ FWD ISOL VALVE pb-sw.................................................................................................. OFF ‐ Check that the FWD ISOL VALVE pb-sw FAULT light does not come on.

Note: If the FWD ISOL VALVE pb-sw FAULT light comes on:

The FWD cargo isolation valve must be secured in the closed position.

Refer to Item 21-28-02B FWD Cargo Isolation Valve

21-28-02B FWD Cargo Isolation Valve (Valves secured closed)

Ident.: MO-21-28-00012795.0001001 / 04 OCT 12 Applicable to: MSN 0189

FLIGHT PREPARATION / LIMITATIONS


21-28-03A AFT Cargo Extraction Fan

Ident.: MO-21-28-00008871.0001001 / 28 JUN 11 Applicable to: MSN 0189, 0438



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CAA-01 ATA 21


21-28-04A AFT Cargo Isolation Valve (Valves checked closed)





‐ ANN LT selector...............................................................................................................TEST ‐ Check that the AFT ISOL VALVE pb-sw FAULT light comes on ‐ ANN LT selector............................................................................................ ....... BRT or DIM ‐ AFT ISOL VALVE pb-sw....................................................................................................OFF ‐ Check that the AFT ISOL VALVE pb-sw FAULT light does not come on.

Note: If the AFT ISOL VALVE pb-sw FAULT light comes on:

The AFT cargo isolation valve must be secured in the closed position.

Refer to Item 21-28-04B AFT Cargo Isolation Valve

21-28-04B AFT Cargo Isolation Valve (Valves secured closed)

Ident.: MO-21-28-00012797.0001001 / 04 OCT 12 Applicable to: MSN 0189, 0438



21-31-01A Automatic Cabin Pressure Control System (CPC, Outflow Valve

21-31-01B AUTO Channel) Ident.: MO-21-31-00008875.0001001 / 11 MAR 10

Applicable to: ALL


If CPC 1 is affected:

AIR COND/CAB/PRESS/CTL 1 (49VU D09) C/B............................................................. Pull

If CPC 2 is affected:

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CAA-01 ATA 21


AIR COND/CAB/PRESS/CTL 2 (122VU Y22) C/B........................................................... Pull

‐ MODE SEL pb-sw............................................................................................................. MAN

‐ On the CAB PRESS SD page, check that the cabin differential pressure, the cabin vertical

speed, the cabin altitude, and the outflow valve position are available.

‐ MAN V/S CTL sw..................................................................................................................DN

‐ On the CAB PRESS SD page, check outflow valve movement.

‐ MODE SEL pb-sw........................................................................................................... AUTO

21-31-04A Landing Elevation Selection AUTO Function

Ident.: MO-21-31-00008876.0001001 / 11 MAR 10

Applicable to: ALL

BEFORE TAKEOFF

‐ Set the LDG ELEV selector on the CABIN PRESS panel at the destination airport altitude.

‐ On the CAB PRESS SD page, check that the LDG ELEV MAN message is displayed.

21-31-05A Landing Elevation Selection MAN Function

Ident.: MO-21-31-00008877.0001001 / 11 MAR 10

Applicable to: ALL


On the CAB PRESS SD page, check that the LDG ELEV AUTO message is displayed to

confirm correct position of the LDG ELEV selector. Note: The landing field elevation of the destination airport may not be correctly displayed on the

CAB PRESS SD page. It is automatically corrected after first engine start.

21-43-02A AFT Cargo Compartment Heating (Heating system set to OFF)




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CAA-01 ATA 21



‐ HOT AIR pb-sw (on the CARGO HEAT overhead panel)................................................. OFF ‐ On the COND SD page, check that the operative valve (either the hot air pressure regulating

valve or the trim air valve) is indicated closed.

21-43-02B AFT Cargo Compartment Heating (Inoperative valve secured in the

closed position)




21-52-01A Air Conditioning Pack (One Air Conditioning Pack Inoperative for 'C'

21-52-01B Repair Interval)

Ident.: MO-21-52-00008889.0005001 / 18 JUL 12

Applicable to: ALL


PACK FLOW pb-sw.................................................................................................................... HI

IN FLIGHT

If BLOWER pb-sw and EXTRACT pb-sw are set to OVRD:

‐ The cabin altitude may reach about 9 700 ft, and

‐ The CAB PR EXCESS CAB ALT alert may be displayed on the EWD.

21-52-01G Air Conditioning Pack (One Air Conditioning Pack in Heat

Exchanger Cooling Mode only). Ident.: MO-21-52-00009193.0001001 / 28 JUN 11

Applicable to: ALL

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CAA-01 ATA 21



PACK 1(2) pb-sw in "heat exchanger cooling only"................................................................ OFF

IN FLIGHT

When the TAT is equal to or less than 12°C:

PACK 1(2) pb-sw in "heat exchanger cooling only"............................................................ ON

If the non- affected air conditioning pack fails:

Maximum flight altitude.............................................................................. 31 500 ft (9 600 m)

DURING DESCENT

If the TAT is above 12°C:

PACK 1 (2) pb-sw in "heat exchanger cooling only"......................................................... OFF

AT THE END OF THE DESCENT, BEFORE LANDING

PACK 1 (2) pb-sw in "heat exchanger cooling only"................................................................ OFF

21-61-02A Pack Controller Primary Channel

Ident.: MO-21-61-00008891.0001001 / 11 MAR 10

Applicable to: ALL

GENERAL INFORMATION

If primary channel is failed:

Pack flow is fixed at the value reached at the time of failure.

If primary and secondary channels are failed:

The air conditioning pack outlet temperature is controlled by the anti-ice valve to a

nominal value of 15°C.

21-63-01A Zone Controller Channel (Primary Channel Inoperative)

Ident.: MO-21-63-00008892.0001001 / 18 JUL 12

Applicable to: ALL

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CAA-01 ATA 21



‐ HOT AIR pb-sw..................................................................................................................OFF

‐ On the COND SD page page, check that the hot air pressure regulating valve is closed.

21-63-01C Zone Controller Channel (Both channels inoperative)

Ident.: MO-21-63-00014514.0001001 / 18 JUL 12

Applicable to: ALL


HOT AIR pb-sw...................................................................................................................... OFF

21-63-02D Cockpit and Cabin Trim Air Valve (Affected valve secured in the

closed position)

Ident.: MO-21-63-00008893.0001001 / 19 MAR 10

Applicable to: ALL


When one trim air valve is secured in the closed position:

The zone controller closes all trim air valves and the hot air pressure regulating valve at

each power up.

To recover normal operation of the operative valves, apply the following procedure

after air conditioning pack start:

If the COND HOT AIR FAULT alert is displayed on the EWD, reset the following

C/Bs:

‐ AIR COND/ZONE TEMP CTL/115 VAC/SYS 1 (122VU V17) C/B

‐ AIR COND/ZONE TEMP CTL/115 VAC/SYS 2 (122VU V18) C/B

‐ AIR COND/ZONE TEMP CTL/28 VDC/SYS 1 (122VU V19) C/B

‐ AIR COND/ZONE TEMP CTL/28 VDC/SYS 2 (122VU V20) C/B

If the COND HOT AIR FAULT alert is still displayed on the EWD:

Refer to Item 21-63-03 Hot Air Pressure Regulating Valve

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IN FLIGHT

If the affected zone temperature becomes uncomfortable:

HOT AIR pb-sw............................................................................................................ OFF

21-63-02C Cockpit and Cabin Trim Air Valve (Hot air pressure regulating

valve checked closed)

Ident.: MO-21-63-00009194.0001001 / 19 MAR 10

Applicable to: ALL


‐ HOT AIR pb-sw..................................................................................................................OFF

‐ On the COND SD page, check that the hot air pressure regulating valve is closed amber.

21-63-03A Hot Air Pressure Regulating Valve (Hot air pressure valve checked

closed)

Ident.: MO-21-63-00009195.0001001 / 11 MAR 10

Applicable to: ALL


‐ HOT AIR pb-sw...................................................................................................................OFF

‐ On the COND SD page, check that the hot air pressure regulating valve is closed amber.

21-63-03C Hot Air Pressure Regulating Valve (Affected valve secured in the

closed position)

Ident.: MO-21-63-00008894.0001001 / 18 JUL 12

Applicable to: ALL


HOT AIR pb-sw....................................................................................................................... OFF

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CAA-01 ATA 21


INTENTIONALLY LEFT BLANK

ident.: mo-21-09-00008895.0001001 / 28 jun 11 applicable...

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