DOC AIRBUS | MMEL ITEMS A320FAir Conditioning Pack
| 21-52-01 | Air Conditioning Pack |
|---|
Applicable to: -
21-52-01-A With speedbrakes available for 'C' repair interval
| Repair interval | Nbr installed | Nbr required | Placard |
|---|---|---|---|
| C 13.04.2026 | 2 | 1 | Yes |
(o)
1)
2)
3)
4)
5)
One may
be inoperative provided that:
1)
ETOPS is not conducted, and
2)
The COND ZONE REGUL FAULT alert is not displayed, and
3)
The affected PACK 1(2) pb-sw is set to OFF, and
4)
The speedbrakes are operative, and
5)
The associated pack flow control valve
is checked closed on the BLEED SD Page.
NOTE:
This proviso does not apply
if the pack flow control valve has been secured in the closed position
as per item 21-51-01.
21-52-01-B Limitation to 31500 ft for 'C' repair interval
| Repair interval | Nbr installed | Nbr required | Placard |
|---|---|---|---|
| C 13.04.2026 | 2 | 1 | Yes |
(o)
1)
2)
3)
4)
5)
One may
be inoperative provided that:
1)
ETOPS is not conducted, and
2)
The flight altitude is limited to 31500 ft ( 9600 m), and
3)
The COND ZONE REGUL FAULT alert is not displayed on the EWD, and
4)
The affected PACK 1(2) pb-sw is set to OFF, and
5)
The associated pack flow control valve
is checked closed on the BLEED SD Page.
NOTE:
This proviso does not apply
if the pack flow control valve has been secured in the closed position
as per item 21-51-01.
21-52-01-G Air cycle machine failed
| Repair interval | Nbr installed | Nbr required | Placard |
|---|---|---|---|
| C 13.04.2026 | 2 | 1 | No |
(o)
1)
2)
One may
be operated on heat exchanger cooling only (air cycle machine failure)
provided that:
1)
The corresponding pack controller is
operative, and
2)
The affected pack outlet temperature
indication is operative on the BLEED SD Page.
21-52-01-H Non pressurized flight
| Repair interval | Nbr installed | Nbr required | Placard |
|---|---|---|---|
| C 13.04.2026 | 2 | 0 | No |
Both may be inoperative provided that:
1)
The flight is not pressurized
2)
The flight is performed with no passengers
on board.
| 21-52-01 | Air Conditioning Pack |
|---|
Applicable to: -
21-52-01-A With speedbrakes available for 'C' repair interval
| Repair interval | Nbr installed | Nbr required | Placard |
|---|---|---|---|
| C 13.04.2026 | 2 | 1 | Yes |
(o)
1)
2)
3)
4)
5)
6)
One may
be inoperative provided that:
1)
ETOPS is not conducted, and
2)
The flight altitude is limited to 37000 ft ( 11200 m), and
3)
The COND ZONE REGUL FAULT alert is not displayed on the EWD, and
4)
The affected PACK 1(2) pb-sw is set to OFF, and
5)
The speedbrakes are operative, and
6)
The associated pack flow control valve
is checked closed on the BLEED SD Page.
NOTE:
This proviso does not apply
if the pack flow control valve has been secured in the closed position
as per item 21-51-01.
21-52-01-B Limitation to 31500 ft for 'C' repair interval
| Repair interval | Nbr installed | Nbr required | Placard |
|---|---|---|---|
| C 13.04.2026 | 2 | 1 | Yes |
(o)
1)
2)
3)
4)
5)
One may
be inoperative provided that:
1)
ETOPS is not conducted, and
2)
The flight altitude is limited to 31500 ft ( 9600 m), and
3)
The COND ZONE REGUL FAULT alert is not displayed on the EWD, and
4)
The affected PACK 1(2) pb-sw is set to OFF, and
5)
The associated pack flow control valve
is checked closed on the BLEED SD Page.
NOTE:
This proviso does not apply
if the pack flow control valve has been secured in the closed position
as per item 21-51-01.
21-52-01-C With speedbrakes available for 'B' repair interval
| Repair interval | Nbr installed | Nbr required | Placard |
|---|---|---|---|
| B 06.04.2026 | 2 | 1 | Yes |
(o)
1)
2)
3)
4)
5)
One may
be inoperative provided that:
1)
ETOPS is not conducted, and
2)
The COND ZONE REGUL FAULT alert
is not displayed on the EWD, and
3)
The affected PACK 1(2) pb-sw is set to OFF, and
4)
The speedbrakes are operative, and
5)
The associated pack flow control valve
is checked closed on the BLEED SD Page.
NOTE:
This proviso does not apply
if the pack flow control valve has been secured in the closed position
as per item 21-51-01.
NOTE:
In the case of depressurization
at altitudes higher than 37000 ft ( 11200 m), oxygen masks may drop down during the descent.
21-52-01-G Air cycle machine failed
| Repair interval | Nbr installed | Nbr required | Placard |
|---|---|---|---|
| C 13.04.2026 | 2 | 1 | No |
(o)
1)
2)
One may
be operated on heat exchanger cooling only (air cycle machine failure)
provided that:
1)
The corresponding pack controller is
operative, and
2)
The affected pack outlet temperature
indication is operative on the BLEED SD Page.
21-52-01-H Non pressurized flight
| Repair interval | Nbr installed | Nbr required | Placard |
|---|---|---|---|
| C 13.04.2026 | 2 | 0 | No |
Both may be inoperative provided that:
1)
The flight is not pressurized
2)
The flight is performed with no passengers
on board.
| 21-52-01 | Air Conditioning Pack |
|---|
Applicable to: -
21-52-01-D With speedbrakes available for 'C' repair interval
| Repair interval | Nbr installed | Nbr required | Placard |
|---|---|---|---|
| C 13.04.2026 | 2 | 1 | Yes |
(o)(m)
1)
2)
3)
4)
5)
One may be inoperative provided that:
1)
ETOPS is not conducted, and
2)
The following alerts:
AIR PACK 1(2) REGUL FAULT
air COND CTL 1(2)-A FAULT
air COND CTL 1(2)-B FAULT
associated
with the operative pack are not displayed on the EWD, and
3)
The affected PACK 1(2) pb-sw is set to OFF, and
4)
The speedbrakes are operative, and
5)
The associated pack flow control valve
is secured in the closed position.
21-52-01-E Limitation to 31500 ft for 'C' repair interval
| Repair interval | Nbr installed | Nbr required | Placard |
|---|---|---|---|
| C 13.04.2026 | 2 | 1 | Yes |
(o)(m)
1)
2)
3)
4)
5)
One may be inoperative provided that:
1)
ETOPS is not conducted, and
2)
The flight altitude is limited to 31500 ft ( 9600 m), and
3)
The following alerts:
AIR PACK 1(2) REGUL FAULT
air cond ctl 1(2)-A FAULT
air COND CTL 1(2)-B FAULT
associated
with the operative pack are not displayed on the EWD, and
4)
The affected PACK 1(2) pb-sw is set to OFF, and
5)
The associated pack flow control valve
is secured in the closed position.
21-52-01-G Air cycle machine failed
| Repair interval | Nbr installed | Nbr required | Placard |
|---|---|---|---|
| C 13.04.2026 | 2 | 1 | No |
(o)
1)
2)
One may
be operated on heat exchanger cooling only (air cycle machine failure)
provided that:
1)
The following alerts:
air cond ctl 1(2)-A FAULT
air COND CTL 1(2)-B FAULT
associated with the operative pack are
not displayed on the EWD, and
2)
The affected pack outlet temperature
indication is operative on the BLEED SD Page.
21-52-01-H Non pressurized flight
| Repair interval | Nbr installed | Nbr required | Placard |
|---|---|---|---|
| C 13.04.2026 | 2 | 0 | No |
Both may be inoperative provided that:
1)
The flight is not pressurized
2)
The flight is performed with no passengers
on board.
| 21-52-01 | Air Conditioning Pack |
|---|
Applicable to: -
21-52-01-D With speedbrakes available for 'C' repair interval
| Repair interval | Nbr installed | Nbr required | Placard |
|---|---|---|---|
| C 13.04.2026 | 2 | 1 | Yes |
(o)(m)
1)
2)
3)
4)
5)
6)
One may be inoperative provided that:
1)
ETOPS is not conducted, and
2)
The flight altitude is limited to 37000 ft ( 11200 m), and
3)
The following alerts:
AIR PACK 1(2) REGUL FAULT
air COND CTL 1(2)-A FAULT
air COND CTL 1(2)-B FAULT
associated
with the operative pack are not displayed on the EWD, and
4)
The affected PACK 1(2) pb-sw is set to OFF, and
5)
The speedbrakes are operative, and
6)
The associated pack flow control valve
is secured in the closed position.
21-52-01-E Limitation to 31500 ft for 'C' repair interval
| Repair interval | Nbr installed | Nbr required | Placard |
|---|---|---|---|
| C 13.04.2026 | 2 | 1 | Yes |
(o)(m)
1)
2)
3)
4)
5)
One may be inoperative provided that:
1)
ETOPS is not conducted, and
2)
The flight altitude is limited to 31500 ft ( 9600 m), and
3)
The following alerts:
AIR PACK 1(2) REGUL FAULT
air cond ctl 1(2)-A FAULT
air COND CTL 1(2)-B FAULT
associated
with the operative pack are not displayed on the EWD, and
4)
The affected PACK 1(2) pb-sw is set to OFF, and
5)
The associated pack flow control valve
is secured in the closed position.
21-52-01-F With speedbrakes available for 'B' repair interval
| Repair interval | Nbr installed | Nbr required | Placard |
|---|---|---|---|
| B 06.04.2026 | 2 | 1 | Yes |
(o)(m)
1)
2)
3)
4)
5)
One may be inoperative provided that:
1)
ETOPS is not conducted, and
2)
The following alerts:
AIR PACK 1(2) REGUL FAULT
AIR COND CTL 1(2)-A FAULT
AIR COND CTL 1(2)- B FAULT
associated
with the operative pack are not displayed on the EWD, and
3)
The affected PACK 1(2) pb-sw is set to OFF, and
4)
The speedbrakes are operative, and
5)
The associated pack flow control valve
is secured in the closed position.
NOTE:
In the case of depressurization
at altitudes higher than 37000 ft ( 11200 m), oxygen masks
may drop down during the descent.
21-52-01-G Air cycle machine failed
| Repair interval | Nbr installed | Nbr required | Placard |
|---|---|---|---|
| C 13.04.2026 | 2 | 1 | No |
(o)
1)
2)
One may
be operated on heat exchanger cooling only (air cycle machine failure)
provided that:
1)
The following alerts:
air cond ctl 1(2)-A FAULT
air COND CTL 1(2)-B FAULT
associated with the operative pack are
not displayed on the EWD, and
2)
The affected pack outlet temperature
indication is operative on the BLEED SD Page.
21-52-01-H Non pressurized flight
| Repair interval | Nbr installed | Nbr required | Placard |
|---|---|---|---|
| C 13.04.2026 | 2 | 0 | No |
Both may be inoperative provided that:
1)
The flight is not pressurized
2)
The flight is performed with no passengers
on board.