Avionics Blower Fan (Avionics ventilation system checked before each flight)

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

Applicable to: -

- During cockpit preparation

Supply the aircraft electrical network.

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

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:

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 02 Avionics Extract Fan