W DOC AIRBUS | MMEL ITEMS A320F

Zone Controller Channel

21-63-01Zone Controller Channel
Applicable to: -
21-63-01-A Primary channel inoperative
Repair intervalNbr installedNbr requiredPlacard
C
13.04.2026		21No
(o)
Primary channel may be inoperative provided that the hot air pressure regulating valve is checked closed on the COND SD Page.

NOTE:
  1. Unequal passengers distribution may cause high temperature in the rear cabin when the hot air pressure regulating valve is closed.
  2. The temperature in the cockpit may be low when the hot air pressure regulating valve is closed combined with single pack operation.
+ Reference
(o) Refer to OpsProc Zone Controller Channel (Primary Channel Inoperative)
21-63-01-B Secondary channel inoperative
Repair intervalNbr installedNbr requiredPlacard
C
13.04.2026		21No
Secondary channel may be inoperative provided that the minimum idle on ground is considered inoperative.
Refer to Item 73-20-05A Minimum Idle on Ground

21-63-01-C Both channels inoperative
Repair intervalNbr installedNbr requiredPlacard
C
13.04.2026		20No
(o)(m)
Primary and secondary channel may be inoperative provided that:

1)
The hot air pressure regulating valve is secured in the closed position, and

2)
The minimum idle on ground is considered inoperative.
Refer to Item 73-20-05A Minimum Idle on Ground

NOTE:
  1. Unequal passengers distribution may cause high temperature in the rear cabin when the hot air pressure regulating valve is closed.
  2. The temperature in the cockpit may be low when the hot air pressure regulating valve is closed combined with single pack operation.
+ Reference
(o) Refer to OpsProc Zone Controller Channel (Both channels inoperative)
(m) AMM TASK 21-63-00-040-004
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