DOC AIRBUS | MMEL ITEMS A320FAvionics Ventilation Filter
| 21-26-09 | Avionics Ventilation Filter |
|---|
Applicable to: -
NOTE:
During ground operations, correct avionics ventilation should be provided.
21-26-09-A VENT AVNCS SYS FAULT not displayed
| Repair interval | Nbr installed | Nbr required | Placard |
|---|---|---|---|
| C 13.04.2026 | 1 | 0 | No |
(o)
1)
2)
3)
4)
May be inoperative (clogged)
provided that:
1)
The blower and extract fans are operative, and
2)
The EXTRACT pb-sw is set to
OVRD, and
3)
Both air conditioning packs are operative, and
4)
The VENT AVNCS SYS FAULT alert is not displayed.
21-26-09-B Valve checked open
| Repair interval | Nbr installed | Nbr required | Placard |
|---|---|---|---|
| C 13.04.2026 | 1 | 0 | No |
(o)(m)
1)
2)
3)
4)
May be inoperative (clogged) provided that:
1)
The blower and extract fans are operative, and
2)
The EXTRACT pb-sw is set to
OVRD, and
3)
Both air conditioning packs are operative, and
4)
The air conditioning inlet valve is checked open before each flight.
21-26-09-C Valve secured open
| Repair interval | Nbr installed | Nbr required | Placard |
|---|---|---|---|
| C 13.04.2026 | 1 | 0 | No |
(o)(m)
1)
2)
3)
4)
5)
May be inoperative (clogged) provided that:
1)
The blower and extract fans are operative, and
2)
The EXTRACT pb-sw is set to
OVRD, and
3)
Both air conditioning packs are operative, and
4)
The air conditioning inlet valve is secured
in the open position, and
5)
The avionics ventilation system is checked before each flight.