SYSTEM DISPLAY - BLEED PAGE - DESCRIPTION AND OPERATION

** ON A/C NOT FOR ALL

1. BLEED Page
The BLEED page is described in the following figure with its 29 parameters as follow:

SD - BLEED Page: Display of the 29 Parameters ** ON A/C NOT FOR ALL

Item 1: Cold air duct supply

Item 2: Emer RAM air valve

Items 3 and 29: Pack outlet temp

Items 4 and 28: Turbine bypass valve

Items 5 and 27: Pack compressor outlet temp

Item 6 and 26: Pack flow

Items 7 and 25: Pack flow control valve

Item 8 and 24: ANTI ICE indications

Items 9 and 23: Wing anti ice valve not closed

Items 10 and 22: ENG precooler inlet press

Items 11 and 21: ENG precooler outlet temperature

Items 12 and 20: ENG number

Items 13 and 19: ENG bleed valve

Items 14 and 18: ENG H.P bleed valve

Item 15: XFEED valve

Item 16: APU bleed valve

Item 17: Ground supply

The symbols related to these indications are described hereafter:

A. Cold air duct supply
(Item 1)

Indications of Bleed Users

The triangles indicate if the mixer unit is supplied by air from packs or ram air.

The triangles are amber if the two flow control valves and the RAM air valve are fully closed (in flight).
The triangles are amber if the two flow control valves are fully closed (on ground).
They are green in the other cases.
The same principle applies to the flow bar which links the pack to the triangles. They are amber when the relevant pack flow control valve is fully closed. They are green in the other cases.

B. Emer RAM air valve
(Item 2)

BLEED Page - Display of the Parameter: RAM AIR VALVE ** ON A/C NOT FOR ALL

(1) Case 1
The valve is normally green and closed.

(2) Case 2
Valve green and open.
This is the case in flight when the EMER RAM air valve is fully open.

(3) Case 2
Valve green and open.
This is the case when the EMER RAM air valve is fully open.

(4) Case 3
Valve amber and open.
This is the case on ground when the EMER RAM air valve is fully open.

(5) Case 3
Valve amber and open.
This is the case when the EMER RAM air valve is fully open
and the aircraft is on ground

(6) Case 4
Valve amber and in transit
This is the case when the EMER RAM air valve is neither fully closed nor fully open.

(7) Case 5
Valve amber XX
This is the case when the EMER RAM air valve status is not available from the SDAC.
The RAM AIR upper link is amber when the valve is amber and open, it is not displayed when the valve is closed, it is displayed in green when the valve is open and green.

(8) Case 5
Valve amber XX
This is the case when the EMER RAM air valve status is not available from the SDAC, or the EMER RAM AIR valve is found faulty on the SDAC incoming bus (valve status fully open and fully closed at the same time).
The RAM AIR links are always green, except in the case 1 where the upper link is not displayed.

C. Engine 2 Pack outlet temperature
(Item 3)

BLEED Page - Display of the Parameters: PACK and PACK OUTLET TEMPERATURES ** ON A/C NOT FOR ALL

BLEED Page - Display of the Parameters: PACK and PACK OUTLET TEMPERATUREs ** ON A/C NOT FOR ALL

(1) Case 1
The PACK outlet temperature is normally displayed in green.

(2) Case 2
The temperature is displayed in amber when higher than 90°C.

(3) Case 3
The temperature is replaced by amber XX when the value is not available from the SDAC.

D. Engine 2 Turbine Bypass Valve
(Item 4)

The needle position represents the position of the turbine bypass valve, therefore the hot air flow to control the pack discharge temperature.
The C (cold) indication corresponds to a minimum supply of hot air flow (turbine bypass valve closed: 0%).
The H (high) indication corresponds to a maximum supply of hot air flow (turbine bypass valve open: 100%).

The needle is normally green.

*** ACSC IMPLEMENT ***
The needle is amber when the valve is faulty.

If the turbine bypass valve position (supplied by the pack temperature controller to the SDAC via the zone controller) is not available, the needle is replaced by amber XX.
Arc, C and H indications are white.
If the turbine bypass valve position (supplied by the pack temperature controller to the SDAC via the Air Conditioning System Controller (ACSC) is not available, the needle is replaced by amber XX.
Arc, C and H indications are white.

E. Engine 2 Pack compressor outlet temperature
(Items 5)

(1) Case 1
The temperature is normally displayed in green.

(2) Case 2
The temperature is displayed in amber when higher than 230°C.

(3) Case 3
The temperature is replaced by amber XX when the value is not available from the SDAC.

F. Engine 2 Pack flow
(Item 6)

BLEED Page - Display of the Parameters: PACK FLOW and ANTI ICE VALVE ** ON A/C NOT FOR ALL

The position of the needle represents the actual rate of pack flow.

(1) Case 1

The green needle can vary between the position LO and the position HI. The LO position corresponds to 80% of airflow to the air conditioning packs, HI position to 120%.
When there is no flow, the needle is frozen at the position 80 %.

(2) Case 2
The needle is amber when the pack flow control valve is fully closed

When there is no flow, the needle is set at the position corresponding to the LO limit.

(3) Case 3
When the pack flow (or the cabin pressure, or the cabin altitude) is not available from the SDAC, the needle is replaced by amber XX.

The scale, the indications HI and LO are white.

G. Engine 2 Pack flow control valve
(Items 7)

BLEED Page - Display of the Parameters: PACK FLOW CTL VALVE and XFEED VALVE ** ON A/C NOT FOR ALL

(1) Case 1
Valve green and closed
This is the case when the pack flow control valve is fully closed and there is no pack valve disagree as transmitted by the SDAC.

(2) Case 2
Valve green and open
This is the case when the valve is not fully closed and there is no pack valve disagree.

(3) Case 3
Valve amber and open
This is the case when the valve is not fully closed and there is a pack valve disagree, transmitted by the SDAC.

(4) Case 4
Valve amber and closed
This is the case when the valve is t fully closed and there is a pack valve disagree.

(5) Case 5
Amber XX
This is the case when the valve position and the valve disagree status are neither available from the SDAC.

H. Right Wing ANTI ICE indication
(Item 8)

The title is displayed in white when the wing anti ice P/BSW is on.

This indication is repeated on the left side (item 24)

It is not displayed when it is off or when the P/BSW status is not available from the SDAC.

It is replaced by amber XX when no valid data are available from the SDAC.

It is not displayed in all the other cases.

I. Right Wing anti ice valve not closed
(Items 9)

BLEED Page - Display of the Parameters: PACK FLOW and ANTI ICE VALVE ** ON A/C NOT FOR ALL

(1) Case 1
The triangle is displayed in green when the related wing anti ice valve is not closed and there is neither an overpressure nor an underpressure.

(2) Case 2
The triangle is displayed in amber when:

the aircraft is on the ground (from the landing gear status)
and the related wing anti ice valve is not closed (for 10s)
or there is an overpressure or an underpressure.

(3) Case 3
The triangle is not displayed when the related wing anti ice valve is closed.

(4) Case 4
The triangle is replaced by amber XX when the related wing anti ice valve status is not available from the SDAC.

J. ENG precooler inlet pressure
(Item 10)

BLEED Page - Display of the Parameters: APU BLEED VALVE, ENGINE BLEED PRESSURE and TEMPERATURE ** ON A/C NOT FOR ALL

(1) Case 1
The pressure is normally displayed in green.

(2) Case 2
It is displayed in amber when the pressure is lower than 4psi, or when there is an overpressure, as transmitted by the SDAC.

(3) Case 3
It is replaced by amber XX when the pressure is not available from the SDAC.

The pressure value can vary from 0 to 98 PSI by steps of 2 PSI.
The unit PSI is always displayed in cyan.

K. ENG precooler outlet temperature
(Item 11)

BLEED Page - Display of the Parameters: APU BLEED VALVE, ENGINE BLEED PRESSURE and TEMPERATURE ** ON A/C NOT FOR ALL

(1) Case 1
The temperature is normally displayed in green.

(2) Case 2
The temperature is displayed in amber when an over temperature or a low temperature signal is received by the SDAC.

(3) Case 3
The temperature is replaced by amber XX when the value is not available from the SDAC.

The temperature can vary from 0 to 510 °C by steps of 5 °C.
The unit °C is always displayed in cyan.

L. ENG number
(Item 12)

The engine number is normally displayed in white. It is displayed in amber when the DMC receives from the engine busses the signal: engine below idle.
When this information is not available the engine number is displayed in white.

M. ENG bleed valve
(Item 13)

BLEED Page - Display of the Parameters: ENGINE BLEED VALVE and HP BLEED VALVE ** ON A/C NOT FOR ALL

BLEED Page - Display of the Parameters: ENGINE BLEED VALVE and ENGINE HP BLEED VALVE ** ON A/C NOT FOR ALL

Transfer of air bleed is achieved from the IP stage of the engine HP compressor by the IP bleed check valve.
The valve indication can be:

(1) Case 1
green and open when the bleed valve is normally not fully closed as commanded (all the other following cases are not valid).

(2) Case 2
green and closed
the bleed valve is normally fully closed as commanded, and the related engine is running.

(3) Case 2
green and closed
the bleed valve is normally fully closed as commanded, for at least 5 s.

(4) Case 3
amber and closed
the bleed valve is abnormally fully closed (for at least 5 s) and there is a PRV LOW REGULATION (information supplied by the BMC to the DMC via the SDAC).

(5) Case 4
amber and open
the bleed valve is not fully closed and there is an engine pressure reg valve disagree from the BMC via the SDAC.

(6) Case 5
XX amber: the bleed valve position (supplied by the BMC to the DMC via the SDAC) is not available.

IP indication is always white.

The duct upstream of the engine bleed valve is amber if the related valve is closed and amber, otherwise it is green.

The duct downstream of the engine bleed valve is amber if there is a PRV LOW REGULATION and the valve is closed for at least 5s, otherwise it is green.
The ducts are not displayed when the valve status is not available from the SDAC.

(7) Case 5
XX amber: The bleed valve position (supplied by the BMC to the DMC via the SDAC) is not available.

The IP indication is always white.

The duct upstream of the engine bleed valve is amber when the related valve is closed and amber, otherwise it is green.

The duct downstream of the engine bleed valve is displayed in green when the PRV is not fully closed for at least 5s and the engine is running. Otherwise, nothing is displayed.
The ducts are not displayed when the valve status is not available from the SDAC.

N. ENG 2 H.P bleed valve
(Item 14)

BLEED Page - Display of the Parameters: ENGINE BLEED VALVE and HP BLEED VALVE ** ON A/C NOT FOR ALL

BLEED Page - Display of the Parameters: ENGINE BLEED VALVE and ENGINE HP BLEED VALVE ** ON A/C NOT FOR ALL

(1) Case 1
Valve closed an green
The engine HP valve is fully closed with no HP valve fault.

(2) Case 2
Valve open and green
The engine HP valve is not fully closed with no HP valve fault.

(3) Case 3
Valve closed and amber
The engine HP valve is fully closed with an HP valve fault present.

(4) Case 4
Amber xx
The valve status is not available from the SDAC.

O. XFEED valve
(Item 15)

BLEED Page - Display of the Parameters: PACK FLOW CTL VALVE and XFEED VALVE ** ON A/C NOT FOR ALL

(1) Case 1
Valve open and green
when all the following cases are not valid

(2) Case 2
Valve closed and green
When the valve is fully closed

(3) Case 3
Valve closed and amber
When the valve is fully closed and there is a manual or automatic command to open, or there is a closure disagreement.

(4) Case 4
Valve open and amber
When the valve is not fully closed and the valve status disagrees with that commanded: open (manual or automatic control)
or the valve status disagrees with that commanded: closed (manual or automatic control)

(5) Case 5
Valve in transit
When the valve is neither fully closed nor fully open.

(6) Case 6
Amber XX
When the valve status transmitted by the SDAC is not valid or the valve status is received as faulty (fully open and fully closed at a time)

P. APU valve
(Item 16)

BLEED Page - Display of the Parameters: APU BLEED VALVE, ENGINE BLEED PRESSURE and TEMPERATURE ** ON A/C NOT FOR ALL

(1) Case 1
Valve open and green
when all the following cases are not valid

(2) Case 2
Valve closed and green
When the APU bleed valve is fully closed

(3) Case 3
Closed and amber
When the valve is fully closed for at least 10s and commanded ON (APU BLEED P/N ON).

(4) Case 4
Amber XX
When the valve status transmitted by the SDAC is not valid.

(5) Not displayed: when the APU is not available.

(6) The title APU is always displayed in white.

(7) The title APU is displayed in white when the APU master switch is ON, or when the APU is available.
The title is not displayed in all other cases.

Q. Ground supply
(Item 17)
a white triangle is displayed when the A/C is on the ground.
It is not displayed when the A/C is in flight or the information is not available.

R. Engine 1 HP bleed valve
(Item 18)
Refer to item 14 where the same processing applies.

S. Engine 1 bleed valve
(Item 19)
Refer to item 13 where the same processing applies.

T. Engine number
(Item 20)
Refer to item 12 where the same processing applies.

U. Engine 1 precooler outlet temperature
(Item 21)
Refer to item 11 where the same processing applies.

V. Engine 1 precooler inlet pressure
(Item 22)
Refer to item 10 where the same processing applies.

W. Left wing anti ice valve
(Item 23)
Refer to item 9 where the same processing applies.

X. Left Wing ANTI ICE indication
(Item 24)
Refer to item 8 where the same processing applies.

Y. Engine 1 Pack flow control valve
(Item 25)
Refer to item 7 where the same processing applies.

Z. Engine 1 Pack flow
(Item 26)
Refer to item 6 where the same processing applies.

AA. Engine 1 Pack compressor outlet temperature
(Item 27)
Refer to item 5 where the same processing applies.

AB. Engine 1 Turbine Bypass Valve
(Item 28)
Refer to item 4 where the same processing applies.

AC. Engine 1 Pack outlet Temperature
(Item 29)
Refer to item 3 where the same processing applies.

[Rev.10 from 2021] 2026.04.01 00:38:49 UTC