DOC AIRBUS | MMEL OPS PROCAvionics Extract Fan (Avionics ventilation system checked before each flight)
| 21-26-02C | Avionics Extract Fan (Avionics ventilation system checked before each flight) |
|---|
Applicable to: -
- Flight preparation/limitations
Time limitation
on ground with electrical network supplied:
OAT (°C) | ≤ 38 | ≤ 45 | ≤ 55 |
|---|---|---|---|
| Max time | No limit | 3 h | 35 min |
- During cockpit preparation
Supply the aircraft electrical
network.
Check that the air conditioning
correctly operates with both air conditioning packs set
to on.
- EXTRACT pb-swOVRD
Clear the VENT EXTRACT FAULT alert using the CLR pb.
- AVNCS VENT/EXTC/FAN (123VU AE2) C/BPull
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.
| Note: | If the
ground horn sounds:
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. |
| 21-26-02C | Avionics Extract Fan (Avionics ventilation system checked before each flight) |
|---|
Applicable to: -
- Flight preparation/limitations
Time limitation
on ground with electrical network supplied:
OAT (°C) | ≤ 38 | ≤ 45 | ≤ 55 |
|---|---|---|---|
| Max time | No limit | 3 h | 35 min |
- During cockpit preparation
Supply the aircraft electrical
network.
Check that the air conditioning
correctly operates with both air conditioning packs set
to on.
- EXTRACT pb-swOVRD
Clear the VENT EXTRACT FAULT alert using the CLR pb.
- AVNCS VENT/EXTC/FAN (123VU AC4) C/BPull
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.
| Note: | If the ground horn sounds:
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. |