ENGINE BLEED AIR SUPPLY SYSTEM - DESCRIPTION AND OPERATION

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1. General
The purpose of the engine bleed air supply system is to:

select one of the two different compressor stages of the engine HP compressor in agreement with the supplied pressure
regulate the bleed air pressure in order to prevent too high pressures
regulate the bleed air temperature in order to prevent too high temperatures.

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2. Component Location

Component Location - Cockpit ** ON A/C NOT FOR ALL

Component Location - Avionics Compartment ** ON A/C NOT FOR ALL

Component Location - Engine ** ON A/C NOT FOR ALL

Electrical Schematic - Engine 1 ** ON A/C NOT FOR ALL

Electrical Schematic - Engine 2 ** ON A/C NOT FOR ALL

Component Location - Cockpit ** ON A/C NOT FOR ALL

Component Location - Avionics Compartment ** ON A/C NOT FOR ALL

Component Location - Engine ** ON A/C NOT FOR ALL

Electrical Schematic - Engine 1 ** ON A/C NOT FOR ALL

Electrical Schematic - Engine 2 ** ON A/C NOT FOR ALL

Component Location - Cockpit ** ON A/C NOT FOR ALL

Component Location - Avionics Compartment ** ON A/C NOT FOR ALL

Component Location - Engine ** ON A/C NOT FOR ALL

Electrical Schematic - Engine 1 ** ON A/C NOT FOR ALL

Electrical Schematic - Engine 2 ** ON A/C NOT FOR ALL

Component Location - Cockpit ** ON A/C NOT FOR ALL

Component Location - Avionics Compartment ** ON A/C NOT FOR ALL

Component Location - Engine ** ON A/C NOT FOR ALL

Electrical Schematic - Engine 1 ** ON A/C NOT FOR ALL

Electrical Schematic - Engine 2 ** ON A/C NOT FOR ALL

FIN	FUNCTIONAL DESIGNATION	PANEL	ZONE	ATA REF
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1HA1	BMC-1	95VU	121	36-11-34
1HA2	BMC-2	96VU	122	36-11-34
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5HA1	VALVE-OVERPRESSURE, ENG 1	451AL	471	36-11-53
5HA2	VALVE-OVERPRESSURE, ENG 2	461AL	481	36-11-53
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5HA1	VALVE-OVERPRESSURE, ENG 1		471	36-11-53
5HA2	VALVE-OVERPRESSURE, ENG 2		481	36-11-53
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6HA1	SENSOR-EXCHANGER OUT TEMP, ENG 1		471	36-11-17
6HA2	SENSOR-EXCHANGER OUT TEMP, ENG 2		481	36-11-17
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6HA1	SENSOR-EXCHANGER OUT TEMP, ENG 1		415	36-11-17
6HA2	SENSOR-EXCHANGER OUT TEMP, ENG 2		425	36-11-17
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7HA1	XDCR-BLEED TRANSFER PRESS, ENG 1		471	36-11-15
7HA2	XDCR-BLEED TRANSFER PRESS, ENG 2		481	36-11-15
8HA1	XDCR-BLEED REGULATED PRESS, ENG 1		471	36-11-16
8HA2	XDCR-BLEED REGULATED PRESS, ENG 2		481	36-11-16
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9HA1	VALVE-FAN AIR, ENG1	451AL	471	36-11-54
9HA2	VALVE-FAN AIR, ENG2	461AL	481	36-11-54
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9HA1	VALVE-FAN AIR, ENG1		471	36-11-54
9HA2	VALVE-FAN AIR, ENG2		481	36-11-54
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10HA1	SOLENOID-BLEED PRESS REG V CTL, ENG 1	413DT	471	36-11-55
10HA2	SOLENOID-BLEED PRESS REG V CTL, ENG 2	423DT	481	36-11-55
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10HA1	SOLENOID-BLEED PRESS REG V CTL, ENG 1		471	36-11-55
10HA2	SOLENOID-BLEED PRESS REG V CTL, ENG 2		481	36-11-55
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7170HM1	THERMOSTAT-FAN AIR VALVE CTL	413DT	413	36-11-43
7170HM2	THERMOSTAT-FAN AIR VALVE CTL	423DT	423	36-11-43
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11HA1	SOL-HP BLEED OVERRIDE, ENG1		471	36-11-58
11HA2	SOL-HP BLEED OVERRIDE, ENG2		481	36-11-58
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4029KS1	SOLENOID-HP BLEED VALVE CLOSURE CONTROL ENG1	438AR	438	73-22-00
4029KS2	SOLENOID-HP BLEED VALVE CLOSURE CONTROL ENG2	448AR	448	73-22-00
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12HA1	RELAY-CTL, ENG 1 HP BLEED OVRD SOL	95VU	121	36-11-00
12HA2	RELAY-CTL, ENG 2 HP BLEED OVRD SOL	96VU	122	36-11-00

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3. System Description

Pneumatic System - Schematic ** ON A/C NOT FOR ALL

Component Location - Engine ** ON A/C NOT FOR ALL

IP Bleed Check Valve ** ON A/C NOT FOR ALL

Sense Line Routing - Engine and Pylon

Sense Line Routing - Engine and Pylon ** ON A/C NOT FOR ALL

Air is generally bled from an Intermediate Pressure (IP) stage of the engine High Pressure (HP) compressor to minimize engine pressure losses. This is the normal engine air-bleed configuration.

The IP stage is the 5th HP compressor stage. At low engine speeds, when the pressure from the IP stage is insufficient, air is automatically bled from a higher compressor stage (HP stage). This happens especially at some aircraft holding points and during descent, with engines at idle.

Pneumatic System - Schematic ** ON A/C NOT FOR ALL

Component Location - Engine ** ON A/C NOT FOR ALL

IP Bleed Check Valve ** ON A/C NOT FOR ALL

Sense Line Routing - Engine and Pylon

Sense Line Routing - Engine and Pylon ** ON A/C NOT FOR ALL

Air is generally bled from an Intermediate Pressure (IP) stage of the engine High Pressure (HP) compressor to minimize engine pressure losses. This is the normal engine air-bleed configuration.

The IP stage is the 7th HP compressor stage. At low engine speeds, when the pressure from the IP stage is insufficient, air is automatically bled from a higher compressor stage (HP stage). This happens especially at some aircraft holding points and during descent, with engines at idle.

The HP stage is the 9th HP compressor stage. Transfer of air bleed is achieved by means of a pneumatically-operated butterfly valve, designated HP bleed valve (4000HA).

The HP stage is the 10th HP compressor stage. Transfer of air bleed is achieved by means of a pneumatically operated-butterfly valve, designated HP bleed valve (4000HA).

When the HP bleed valve is closed, air is directly bled from the IP stage through an IP bleed check valve (7110HM), fitted with two flappers.
When the HP bleed valve is open, the HP stage pressure is admitted into the pneumatic ducting and closes the IP bleed check valve. Air is then bled from the HP stage only.
The HP bleed valve operates pneumatically and is connected by a sense line to a bleed pressure regulator valve (4001HA).
When the HP bleed valve is closed, air is directly bled from the IP stage through an IP bleed check valve (7110HM), fitted with two flappers.
When the HP bleed valve is open, the HP stage pressure is admitted into the pneumatic ducting and closes the IP bleed check valve. Air is then bled from the HP stage only.
The HP bleed valve operates pneumatically and is connected by a sense line to a bleed pressure regulator valve (4001HA) and to a HP bleed override solenoid (11HA).
When the HP bleed valve is closed, air is directly bled from the IP stage through an IP bleed check valve (7110HM), fitted with two flappers.
When the HP bleed valve is open, the HP stage pressure is admitted into the pneumatic ducting and closes the IP bleed check valve. Air is then bled from the HP stage only.
The HP bleed valve operates pneumatically and is connected by a sense line to a bleed pressure regulator valve (4001HA) and to a solenoid (4029KS) .
The bleed pressure regulator valve is installed in the duct downstream of the IP bleed check valve and the HP bleed valve . The bleed pressure regulator valve also operates pneumatically but opening and closing can be controlled by a bleed pressure regulator valve control solenoid (10HA). The solenoid is installed in the duct downstream of the bleed air precooler exchanger (7150HM). The solenoid controls the bleed pressure regulator valve which controls the HP bleed valve at the same time.
During cruise in normal bleed condition, the solenoid (4029KS) (installed in the fan compartment) is energized. This causes the solenoid opens to ambient the HPV PRV coupling sense line which lets the HPV close pneumatically. It avoid a permanent HP bleed due to low IP engine pressures.
During cruise with normal bleed condition, the solenoid (11HA) is energized. This causes the solenoid opens to ambient the HPV PRV coupling sense line which lets the HPV close pneumatically. It avoid a permanent HP bleed due to low IP engine pressures.
Downstream of the PRV an overpressure valve (OPV) (5HA) is installed to protect the pneumatic system against damage if overpressure occurs. To keep the temperature within the limits, a fan air valve (FAV) (9HA) is installed in the cooling air duct which supplies fan air to the precooler exchanger . The FAV operates pneumatically and is connected by a sense line to a fan air valve control thermostat (7170HM). The thermostat is installed downstream of the precooler exchanger.
Two pressure transducers are installed on a bracket adjacent to the precooler exchanger. One pressure transducer (7HA) is connected with a sense line to the pneumatic duct downstream of the HP bleed valve , the other (8HA) is connected with a sense line to the pneumatic duct downstream of the PRV. An exchanger outlet temperature sensor (6HA) is installed in the elbow of the pneumatic duct in the pylon downstream of the precooler exchanger . Both pressure transducers are connected to the bleed air monitoring computers (BMC) by an electrical cable.
Bleed air at controlled pressure and temperature is supplied through insulated ducts to the user as specified in 36-00-00.

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4. Component Description

A. High Pressure Bleed Valve (HPV) FIN: 4000-HA

High Pressure Bleed Valve ** ON A/C NOT FOR ALL

(1) The HP Bleed Valve is a 4 in. dia. butterfly-type valve which operates as a shut-off and pressure regulating valve. The HP bleed valve is normally spring-loaded closed in the absence of upstream pressure. A minimum pressure of 8 psig is necessary to open the valve.

The HP bleed valve pneumatically limits the downstream static pressure to 36 plus or minus 3 psig. It closes fully pneumatically when the upstream static pressure reaches 120 psig plus 5 psig or minus 10 psig. A pneumatic sense line connects the HP bleed valve with the bleed pressure regulator valve (PRV) in order to make sure that the HP bleed valve will close when bleed pressure regulator valve is controlled closed.

(2) A solenoid is installed in the fan compartment. It is connected by a sense line to the HPV-PRV coupling sense line. When the engine is used with the old engine bleed air design, the Thrust Specific Fuel Consumption (TSFC) increases. This is because of low IP engine pressures give permanent HP bleed.
To avoid this, during cruise with normal bleed condition,

Wing Anti-Icing (WAI) not selected ON
Normal bleed configuration (2 bleeds, 2 packs)
Ps3 more than or equal to 110 psig
Altitude over 15000ft
the solenoid is energized by the Engine Electronic Controller (EEC). It opens to ambient the HPV-PRV coupling sense line which lets HPV controlled close pneumatically.

(3) A solenoid is installed on a bracket in each pylon. It is connected by a sense line to the HPV-PRV coupling sense line. When the engine is used with the old engine bleed air design, the Thrust Specific Fuel Consumption (TSFC) increases. This is because of low IP engine pressures give permanent HP bleed.
To avoid this, during cruise with normal bleed condition:

Wing Anti-Icing (WAI) not selected ON,
Normal bleed configuration (2 bleeds, 2 packs),
Ps3 more than or equal to 85 psig,
P0<7.65 psig.
The solenoid is energized by the Bleed monitoring computer (BMC). It opens to ambient the HPV-PRV coupling sense line which lets HPV controlled close pneumatically.

(4) Detailed Description

High Pressure Bleed Valve - Schematic ** ON A/C NOT FOR ALL

The HP bleed valve contains three main parts :

a valve body,
a pneumatic actuator,
a regulator assembly.

(a) Regulation
The HP bleed valve upstream pressure supplies chamber (1) of the regulator through a jet to control the position of the clapper (2) and maintain constant air pressure in the HP bleed valve actuator opening chamber.
The test intake is used for checking correct valve operation on the ground by directly supplying the regulator.
The HP bleed valve downstream pressure supplies the HP bleed valve actuator closing chamber through distribution clapper (3). Indeed when downstream pressure reaches the value determined by spring preloading.

(b) Opening/closing
reduced pressure air supplies chamber (4) of the opening/closing sub assembly though a jet to control the position of clapper (5) against its lower seat position and allow the HP bleed valve actuator opening chamber supply with reduced pressure air.
When chamber (4) is vented to ambient the clapper (5) leaves its lower seat position and reduced pressure air is allowed to supply the HP bleed valve actuator closing chamber (by unseating the springloaded ball).

(c) Overpressure Safety device
When upstream pressure reaches a specified value, clapper (6) vents to ambient chamber (4) of the opening/closing subassembly and plugs upstream pressure regulator inlet. This causes the HP bleed valve to close.

(d) A safety valve attached to the cover protects the pneumatic actuator against overpressure in case of HP bleed valve failed open.

(5) Controls and Indicating
HP bleed valve operation is fully pneumatic. The lower ECAM display unit indicates its position (open or closed) on the BLEED page

ECAM Upper and Lower Display Units ** ON A/C NOT FOR ALL

The two BMCs monitor the operation of the HP bleed valve (close microswitch signal, and transfer pressure level). They receive and process the signals and transmit the information per data bus by the System Data Acquisition Concentrator (SDAC) to the ECAM system which generates the system display (Ref. 36-20-00).

ECAM - Generation ** ON A/C NOT FOR ALL

Additionally, they transmit the information to the Centralized Fault Display Interface Unit (CFDIU). The CFDIU generates maintenance information which is displayed on the Multi Function Control Display Unit (MCDU) if the MCDU MENU is selected.

CFDS Menu ** ON A/C NOT FOR ALL

LAST LEG REPORT Page ** ON A/C NOT FOR ALL

PREVIOUS LEGS REPORT Page ** ON A/C NOT FOR ALL

LRU IDENT Page ** ON A/C NOT FOR ALL

CURRENT STATUS Page ** ON A/C NOT FOR ALL

CLASS 3 FAULTS Page ** ON A/C NOT FOR ALL

TEST Page ** ON A/C NOT FOR ALL

B. Bleed Pressure Regulator Valve (PRV)

Bleed Pressure Regulator Valve (PRV) ** ON A/C NOT FOR ALL

(1) The PRV is a 4 in. dia. butterfly-type valve, normally spring-loaded closed in absence of upstream pressure. A minimum upstream pressure of 8 psig is necessary to open the valve.
The PRV pneumatically regulates the downstream pressure to 44 plus or minus 1.75 psig.
It closes automatically in the following cases :

overtemperature downstream of the precooler exchanger (257 plus or minus 3) deg.C (60 s delay),
overpressure downstream of the PRV is 57 psi and it stays above 54 psi for 15 seconds,
ambient overheat in pylon/wing/fuselage ducts surrounding areas,
APU bleed valve not closed,
corresponding starter valve not closed.
It is controlled in closed position by crew action on:
ENG FIRE pushbutton switch
ENG BLEED pushbutton switch.

The PRV closes pneumatically in case of impending reverse flow to the engine. The Overpressure Valve (OPV) installed downstream of the PRV protects the system against damage if overpressure occurs.
A sense line (1/4 in. dia.) connects the PRV to the HP Bleed Valve in order to close the HP Bleed Valve if the PRV is closed or controlled to close. The thermal fuse installed in the valve body causes the valve to close at 450 plus or minus 25 deg.C.

(2) The PRV is a 4 in. dia. butterfly-type valve, normally spring-loaded closed in absence of upstream pressure. A minimum upstream pressure of 8 psig is necessary to open the valve.
The PRV pneumatically regulates the downstream pressure to 44 plus or minus 3 psig.
It closes automatically in the following cases :

overtemperature downstream of the precooler exchanger (257 plus or minus 3) deg.C (60 s delay)
overpressure downstream of the PRV is 57 psi and it stays above 54 psi for 15 seconds
ambient overheat in pylon/wing/fuselage ducts surrounding areas
APU bleed valve not closed
corresponding starter valve not closed.
It is controlled in closed position by crew action on:
ENG FIRE pushbutton switch
ENG BLEED pushbutton switch.

(3) The PRV is a 4 in. dia. butterfly-type valve, normally spring-loaded closed in absence of upstream pressure. A minimum upstream pressure of 8 psig is necessary to open the valve.
The PRV pneumatically regulates the downstream pressure to 44 plus or minus 3 psig.
It closes automatically in the following cases :

overtemperature downstream of the precooler exchanger (257 plus or minus 3) deg.C (60 s delay)
overpressure downstream of the PRV is 57 psi and it stays above 54 psi for 15 seconds
ambient overheat in pylon/wing/fuselage duct surrounding areas
APU bleed valve not closed
corresponding starter valve not closed.
It is controlled in closed position by crew action on:
ENG FIRE pushbutton switch
ENG BLEED pushbutton switch.

C. Solenoid HP Bleed

(1) Solenoid HP Bleed Override
Not Applicable.

(2) Solenoid HP Bleed Override

Solenoid HP Bleed Overrride ** ON A/C NOT FOR ALL

(a) Although allowing the air bleed on the IP port of the engine, the solenoid when energized permits to control closure of the HP Bleed Valve.

(b) Operation
The unit comprises a solenoid actuated valve, with spring return.
When the unit is de-energized, the valve seals the HPV to PRV sense line, the internal parts of the solenoid are at atmospheric pressure.
Energizing the unit opens the valve allowing air to flow from the HPV to PRV sense line to atmosphere.

(3) HP Bleed Valve Closure Control Solenoid

HP Bleed Valve Closure Control Solenoid ** ON A/C NOT FOR ALL

(a) Although allowing the air bleed on the IP port of the engine, the solenoid when energized permits to control closure of the HP Bleed Valve.
The solenoid is mounted on the fan case on each engine.

(b) Operation
The solenoid is energized/de-energized in reponse to EEC signals.
When the unit is de-energized, the valve seals the HPV to PRV sense line, the internal parts of the solenoid are at atmospheric pressure.
Energizing the unit opens the valve allowing air to flow from the HPV to PRV sense line to atmosphere.

(4) Detailed Description

Bleed Pressure Regulator Valve (PRV) - Schematic ** ON A/C NOT FOR ALL

The PRV contains three main parts :

a valve body,
a pneumatic actuator,
a regulator assembly.

(a) Regulation
The upstream pressure supplies chamber (1) of the regulator through a jet to control the position of the clapper (2) and maintain constant air pressure in the actuator opening chamber.
The regulator calibration can be modified by the secondary stage of the regulator which is pneumatically connected to the Bleed Pressure regulator valve Control Soleno??d according to the air temperature sensed downstream to the PCE. The air pressure in chamber (3) can vary according to an air leakage controlled by the Bleed Pressure Regulator Valve Control Solenoid. As clapper (2) remains in contact with its seat (4), downstream pressure still supplies the actuator closing chamber despite a reduced pressure air value lower than the nominal regulation threshold.
The test intake is used for checking correct valve operation on the ground by directly supplying the regulator.
The downstream pressure supplies the actuator closing chamber through distribution clapper (4). Indeed when downstream pressure reaches the value determined by spring preloading.

(b) Opening/Closing
Reduced pressure air supplies chamber (5) of the opening/closing sub assembly though a jet to control the position of clapper (6) against its lower seat position and allow the HP Bleed Valve actuator opening chamber supply with reduced pressure air.
When chamber (5) is vented to ambient the clapper (6) leaves its lower seat position and reduced pressure air is allowed to supply the HP Bleed Valve actuator closing chamber.

(c) Safety devices and indications
A thermal fuse (7) permits to vent to ambient chamber (5) of the opening/closing subassembly. This causes the valve to close.
The PRV is equipped with an upstream pressure test port which permits you to perform an "in situ" test.
A manual override permits you to close the valve mechanically on the ground.
The microswitch in the valve signals the extreme position (closed) of the butterfly plate.

(5) Control and Indicating
PRV operation is fully pneumatic. The PRV can be controlled in close position from the AIR COND overhead control panel. The pushbutton switches (ENG 1 (2) BLEED) energize/de-energize the solenoid. The lower ECAM display unit indicates its position on the BLEED page.

ECAM Upper and Lower Display Units ** ON A/C NOT FOR ALL

The two BMCs monitor the operation of the PRV (closed microswitch signal and regulated pressure level). They receive and process the signals and transmit the information per data bus by the SDAC to the ECAM system which generates the system display (Ref. AMM D/O 36-20-00-00). Additionally, they transmit the information to the CFDIU. The CFDIU generates maintenance information which is displayed on the MCDU if the MCDU MENU is selected.

CFDS Menu ** ON A/C NOT FOR ALL

D. Bleed Pressure Regulator Valve Control Solenoid

Bleed Pressure Regulator Valve Control Solenoid ** ON A/C NOT FOR ALL

(1) The bleed pressure regulator valve control solenoid is installed downstream of the precooler exchanger to control the bleed pressure regulator valve. It consists of:

a thermostat assembly
a solenoid valve assembly
a non return assembly.

(2) The bleed pressure regulator valve control solenoid is installed downstream of the precooler exchanger to control the bleed pressure regulator valve. It includes :

a thermostat body assy
a solenoid sub-assembly
a non-return sub-assembly

(3) Function

Bleed Pressure Regulator Valve Control Solenoid - Schematic ** ON A/C NOT FOR ALL

(a) Temperature Limitation
When the temperature downstream of bleed air precooler exchanger increases and reaches 235 deg.C (455 deg.F), the INVAR rod in the sensing tube starts to open the rod valve by differential dilatation. This cause a modification of the butterfly position of the bleed pressure regulator valve which tends to close to reduce the downstream pressure . If the temperature increases up to 245 deg.C (473 deg.F) the rod valve will be full open and the bleed pressure limited to 17.5 psig.

(b) Closure of bleed pressure regulator valve
When the solenoid is energized, its valve moves away from its seal and vents the bleed pressure regulator valve which closes. When the solenoid is not energized, the solenoid valve is spring-loaded closed.

NOTE: The Bleed Pressure Regulator Valve Control Solenoid has no direct effect on the HP Bleed Valve (HPV) operation. The HP Bleed Valve would also close because the Bleed Valve (PRV) closure would vent to ambient the signal pressure in the sense line between the Bleed Valve and the HP Bleed Valve.

(c) Non-return function
The regulator diaphragm detects a differential pressure between downstream precooler exchanger and upstream pressure regulator valve.
When the difference between upstream and downstream pressure (Delta P) is lower than or equal to 10 mb, the diaphragm moves and opens the solenoid valve, causing the closure of the bleed pressure regulator valve.

(4) Function

Bleed Pressure Regulator Valve Control Solenoid - Schematic ** ON A/C NOT FOR ALL

(a) General operation.
The bleed pressure regulator valve control solenoid continuously senses the temperature of the air from the bleed air precooler exchanger of the bleed air system. It also monitors the differential pressure between the upstream side of the bleed pressure regulator valve and the downstream side of the bleed air precooler exchanger.
It controls pneumatically the air supply through the bleed air system by closing the bleed pressure regulator valve.

(b) Electrical closing function.
When the coil of the solenoid sub-assembly is energized, the core moves up and the clapper moves off its seat, under the spring load. This vents the coupling line and causes closure of the bleed pressure regulator valve.

NOTE: The bleed pressure regulator valve control solenoid has no direct effect on the HP bleed valve operation. The HP bleed valve also closes because the bleed pressure regulator valve closure vents to ambient the signal pressure in the sense line between the bleed pressure regulator valve and the HP bleed valve.

(c) Non-return function.
The diaphragm sub-assembly detects a differential pressure between the downstream section of the bleed air precooler exchanger and the upstream section of the bleed pressure regulator valve.
When the differential pressure decreases below 0.01 bar (0.145 PSI), the diaphragm sub-assembly opens the solenoid valve.
This closes the bleed pressure regulator valve.
If the pressure upstream the bleed pressure regulator valve is too high, the relief valve opens to prevent damage to the diaphragm sub-assembly.

E. Overpressure Valve (OPV)

Overpressure Valve (OPV) ** ON A/C NOT FOR ALL

(1) The OPV is a 4 in. dia. butterfly-type valve, whose operation is fully pneumatic. In normal conditions the valve is spring-loaded open.

(2) Detailed Description

Overpressure Valve (OPV) - Schematic ** ON A/C NOT FOR ALL

The OPV contains two main parts :

a valve body
an actuator assembly.

(a) Regulation

1 For OPV P/N 6740B05XXXX:

When the upstream pressure increases and reaches a value between 81 and 85 psig, the OPV starts to close (pressure on the piston overcomes the spring force). This decreases the air flow and so reduces the downstream pressure. At more than 85 psig upstream pressure the OPV is fully closed, it opens again when the upstream pressure has decreased to less than 50 psig.

2 For OPV P/N 6740E01XXXX:

When the upstream pressure increases and reaches a value between 81 and 85 psig, the OPV starts to close (pressure on the piston overcomes the spring force). This decreases the air flow and so reduces the downstream pressure. At more than 85 psig upstream pressure the OPV is fully closed, it opens again when the upstream pressure has decreased to between 20 and 57.20 psig.

3 For OPV P/N 6740F01XXXX:

When the upstream pressure increases and reaches a value between 81 and 85 psig, the OPV starts to close (pressure on the piston overcomes the spring force). This decreases the air flow and so reduces the downstream pressure. At more than 85 psig upstream pressure the OPV is fully closed, it opens again when the upstream pressure has decreased to between 29 and 56 psig.

4 For OPV P/N 6740B03XXXX:

When the upstream pressure increases and reaches a value between 79.78 and 85.57 psig, the OPV starts to close (pressure on the piston overcomes the spring force). This decreases the air flow so reduces the downstream pressure. At a value between 84.13 and 89.92 psig upstream pressure the OPV is fully closed, it opens when the upstream pressure has decreased to 34.95 psig.

5 For OPV P/N 6740B01XXXX:

When the upstream pressure increases and reaches 55 psig, the OPV starts to close (pressure on the piston overcomes the spring force). This decreases the air flow and so reduces the downstream pressure. It opens again when the upstream pressure has decreased to 34.95 psig.

(b) Safety devices and indications
The OPV is equipped with a test port which serves to perform an "in situ" test.
A microswitch in the OPV signals the extreme open position.

(3) Controls and Indicating
OPV operation is fully pneumatic. It cannot be controlled from the cockpit.

F. Bleed Air Precooler Exchanger

Bleed Air Precooler Exchanger ** ON A/C NOT FOR ALL

(1) The precooler exchanger is a tubular steel assembly with crossflow air routing configuration.

(2) Detailed Description

(a) Function
The precooler assures cooling of the hot air bled from the engine compressors by a heat exchange process using cold air from the engine fan.

G. Fan Air Valve (FAV)

Fan Air Valve (FAV) ** ON A/C NOT FOR ALL

(1) The FAV is a 5.5 in. dia. butterfly-type valve, normally spring - loaded closed in the absence of pressure. A minimum upstream pressure of 8 psig is necessary to open the valve. The FAV regulates the downstream precooler exchanger temperature to 200 plus or minus 15 deg.C (27 deg.F).

(2) Detailed description
The FAV contains two main parts :

a valve body
an actuator assembly.

(a) Regulation
A thermostat installed downstream of the precooler exchanger senses the hot air temperature and sends to the valve a pressure signal corresponding to precooler cooling air demand. The FAV butterfly takes a position from fully closed to fully open to maintain the temperature value of air bleed within limits.

(b) Safety devices and indications
The FAV is equipped with a test port which serves to perform an "in situ" test.
A manual override serves to close the valve mechanically on the ground.
Two microswitches in the valve signal the full open and full closed positions of the butterfly. A thermal fuse installed on the valve body closes the valve if the nacelle temperature reaches 450 plus or minus 25 deg.C (45 deg.F).

H. Fan Air Valve Control Thermostat

Fan Air Valve Control Thermostat ** ON A/C NOT FOR ALL

Fan Air Valve Control Thermostat - Schematic ** ON A/C NOT FOR ALL

(1) The fan air valve control thermostat is installed downstream of the bleed air precooler exchanger. It controls, through the fan air valve, the engine fan cooling airflow in order to maintain the bleed air temperature to 200 deg.C (392 deg.F) plus or minus 15 deg.C (27 deg.F).

(2) Detailed Description

Fan Air Valve Control Thermostat - Schematic ** ON A/C NOT FOR ALL

The fan air valve control thermostat contains two mains parts:

A temperature sensing element
A pressure regulator.

(a) Regulation
When the temperature downstream of the precooler exchanger is below the required value:

the INVAR rod valve remains on its seat
no air flows through the pressure regulator
the FAV remains closed.

When the temperature is over the required value differential expansion between the INVAR rod and the stainless steel sensing tube opens the rod valve causing the venting of the chamber A and thus allowing a pressure signal through the thermostat to the opening chamber of the FAV.

Between both values the FAV butterfly has an intermediate position.

I. Bleed Transfer Regulated Pressure Transducers (Ref. 36-21-00)

(1) The pressure transducer is a piezo-resistive type cell. It senses the bleed transfer/regulated pressure and transforms it into a proportional current voltage.

(2) Detailed Description
Each pressure transducer consists of :

a body with attachment plate
a measuring electronic cell
an electrical connector
a pressure port.

(a) Operation
Operation of both transducers is identical.
The pressure to be measured is ducted to the transducer via a sense line. It acts on the integrated strain gage of the piezo-resistive cell to generate an electrical signal proportional to the pressure variation. The signal is transmitted to the bleed monitoring computer.

J. Exchanger Outlet Temperature Sensor (Ref. 36-21-00)

(1) The sensor monitors the temperature downstream of the precooler. It is a double platinum winding type.

(2) Detailed Description
The sensor consists of :

a housing with a threaded part for installation
a sensing element.
an electrical connector.

(a) Operation
The temperature of the bleed air is sensed by the sensing element, transformed into an electrical signal and transmitted to the bleed monitoring computer.

** ON A/C NOT FOR ALL

5. Power Supply

Electrical Schematic - Engine 1 ** ON A/C NOT FOR ALL

Electrical Schematic - Engine 2 ** ON A/C NOT FOR ALL

-------------------------------------------------------------------------------

BUSBAR VOLTAGE FUNCTIONS ATA NO.

AND POWER

SUPPLY

-------------------------------------------------------------------------------

801PP 28 VDC ESS Power Supply to :

Bleed Air Monitoring Computer 1 (BMC 1) 36-11-00

Relay ENG 1 BLEED LAMP TEST AND INTERFC 36-20-00

Pressure Transducers 36-21-00

202PP 28 VDC NORM Power Supply to :

Bleed Air Monitoring Computer 2 (BMC 2) 36-11-00

Relay ENG 2 BLEED LAMP TEST AND INTERFC 36-20-00

Pressure Transducers 36-21-00

801PP 28 VDC ESS Power Supply to :

Bleed Air Monitoring Computer 1 (BMC 1) 36-11-00

ENG 1 BLEED Pushbutton Switch 36-20-00

ENG 1 FIRE Handle 26-00-00

202PP 28 VDC NORM Power Supply to :

Bleed Air Monitoring Computer 2 (BMC 2) 36-11-00

ENG 2 BLEED Pushbutton Switch 36-20-00

ENG 2 FIRE Handle 26-00-00

Electrical Schematic - Engine 1 ** ON A/C NOT FOR ALL

Electrical Schematic - Engine 2 ** ON A/C NOT FOR ALL

-------------------------------------------------------------------------------

BUSBAR VOLTAGE FUNCTIONS ATA NO.

AND POWER

SUPPLY

-------------------------------------------------------------------------------

801PP 28 VDC ESS Power Supply to :

Bleed Air Monitoring Computer 1 (BMC 1) 36-11-00

Relay ENG 1 BLEED LAMP TEST AND INTERFC 36-20-00

Pressure Transducers 36-21-00

202PP 28 VDC NORM Power Supply to :

Bleed Air Monitoring Computer 2 (BMC 2) 36-11-00

Relay ENG 2 BLEED LAMP TEST AND INTERFC 36-20-00

Pressure Transducers 36-21-00

801PP 28 VDC ESS Power Supply to :

Bleed Air Monitoring Computer 1 (BMC 1) 36-11-00

ENG 1 BLEED Pushbutton Switch 36-20-00

ENG 1 FIRE Handle 26-00-00

Relay ENG 1 HP BLEED OVRD SOL 36-11-00

202PP 28 VDC NORM Power Supply to :

Bleed Air Monitoring Computer 2 (BMC 2) 36-11-00

ENG 2 BLEED Pushbutton Switch 36-20-00

ENG 2 FIRE Handle 26-00-00

Relay ENG 2 HP BLEED OVRD SOL 36-11-00

** ON A/C NOT FOR ALL

6. Operation

Pneumatic System - Schematic ** ON A/C NOT FOR ALL

Bleed Pressure Regulator Valve (PRV) - Schematic ** ON A/C NOT FOR ALL

Bleed Pressure Regulator Valve Control Solenoid - Schematic ** ON A/C NOT FOR ALL

ECAM Upper and Lower Display Units ** ON A/C NOT FOR ALL

CFDS Menu ** ON A/C NOT FOR ALL

Pneumatic System - Schematic ** ON A/C NOT FOR ALL

Bleed Pressure Regulator Valve (PRV) - Schematic ** ON A/C NOT FOR ALL

Bleed Pressure Regulator Valve Control Solenoid - Schematic ** ON A/C NOT FOR ALL

ECAM Upper and Lower Display Units ** ON A/C NOT FOR ALL

CFDS Menu ** ON A/C NOT FOR ALL

A. Function

The bleed systems of engines 1 and 2 are similar and operate independently of each other.
Air is tapped either from intermediate HP compressor stage through an IP bleed check valve or from high HP compressor stage through an HP bleed valve according to engine speed.
When engine speed is low, especially during aircraft descent with engine at iddle, IP port pressure is insufficient. The air is automatically bled from the HP port (high pressure, on the 9th stage) through the HP Bleed Valve and IP Bleed Check Valve is closed to prevent air recirculation.
When engine speed is high, the engine air bleed is in normal configuration. The air is bled from the IP port (intermediate pressure, on the 5th stage) through the IP Bleed Check Valve and HP Bleed Valve closes.
Downstream of the HP bleed valve and IP check valve, the bleed pressure regulator valve regulates the bleed air pressure to a predetermined value. The valve can be controlled in closed position through a solenoid installed downstream of the precooler exchanger. As the PRV is connected to the HPV by a sense line, when the bleed is controlled OFF, both PRV and HPV are vented and close simultaneously.
To prevent any ducting damage caused by an incorrect regulation of the PRV (high pressure) an overpressure valve has been installed downstream of the PRV. It will close when downstream PRV pressure reaches the OPV closing value.
Pressure regulated air is then routed to the users through the bleed air precooler exchanger where it is be cooled. Cooling is achieved by modulation of cold airflow from the engine fan, through a fan air valve controlled by a fan air valve control thermostat.

The bleed systems of engines 1 and 2 are similar and operate independently of each other.
Air is tapped either from intermediate HP compressor stage through an IP bleed check valve or from high HP compressor stage through an HP bleed valve according to engine speed.
When engine speed is low, especially during aircraft descent with engine at iddle, IP port pressure is insufficient. The air is automatically bled from the HP port (high pressure, on the 10th stage) through the HP Bleed Valve and IP Bleed Check Valve is closed to prevent air recirculation.
When engine speed is high, the engine air bleed is in normal configuration. The air is bled from the IP port (intermediate pressure, on the 7th stage) through the IP Bleed Check Valve and HP Bleed Valve closes.
Dowstream of the HP bleed valve and IP check valve, the bleed pressure regulator valve regulates the bleed air pressure to a predetermined value. The valve can be controlled in closed position through a solenoid installed downstream of the precooler exchanger. As the PRV is connected to the HPV by a sense line, when the bleed is controlled OFF, both PRV and HPV are vented and close simultaneously.
To prevent any ducting damage caused by an incorrect regulation of the PRV (high pressure) an overpressure valve has been installed downstream of the PRV. It will close when downstream PRV pressure reaches the OPV closing value.
Pressure regulated air is then routed to the users through the bleed air precooler exchanger where it is be cooled. Cooling is achieved by modulation of cold airflow from the engine fan, through a fan air valve controlled by a fan air valve control thermostat.

B. Fault Detection and Monitoring of the System
The monitoring system detects failures and abnormal operation of the engine bleed air supply system. It warns the crew and transmits the relevant information to the upper and lower ECAM display units. Additionally the MASTER CAUT light comes on and a single chime sounds. The system also enables abnormal operation and failure to be detected during flight in order to facilitate replacement on the ground of faulty components (Line Replaceable Units, LRU).

Valves are fitted with position microswitches for monitoring.
An exchanger outlet temperature sensor monitors the precooler outlet temperature.
Two pressure transducers monitor the air pressure available in circuit.

(1) The two BMCs monitor the electrical signals from the microswitches of the valves, the temperature at the precooler outlet, the transferred and the regulated pressures. Additionally, they monitor ambient overheat in pylons, wings and the fuselage (Ref. AMM D/O 36-22-00-00).

(2) The two BMCs transmit data through the SDAC to the ECAM system which generates the indications on the system page. The indications are : pressure, temperature and position of the main valves (PRV, HP Bleed Valve , CROSSBLEED and APU BLEED valve). The two BMCs signal directly to the AIR COND overhead control panel the ENG 1 (2) BLEED FAULT signal.

(3) The two BMCs trigger a warning in case of :

overpressure/low pressure
overtemperature/low temperature
ambient overheat.

(4) The two BMCs control the closure of the PRV (during warning, engine start, APU bleed) automatic mode of CROSSBLEED valve and APU bleed valve opening availability.

(5) The two BMCs monitor the correct operation of the whole system and detect abnormal function of an item. They send this data to the Centralized Fault Display System (CFDS) (Maintenance Computer).

NOTE: All the class 1, 2 and 3 maintenance messages transmitted from the two BMCs are listed in the INDEX of the TSM.

** ON A/C NOT FOR ALL

7. BMC Parameter List

A. Data Bus from EIU

(1) Discrete word

----------------------------------------------------------------------------

! KEY: (e) !

! SDI = 01 or 11 from EIU1 !

! SDI = 10 or 00 from EIU2 !

!--------------------------------------------------------------------------!

! LABEL ! SDI ! BIT ! REFRESH ! PARAMETER !STATUS 0!STATUS 1! COMMENTS !

! ! ! ! RATE (ms) ! DEFINITION ! ! ! !

!-------!-----!-----!-----------!------------!--------!--------!-----------!

! 270 ! (e) ! 13 ! 250 max ! ENGINE !CLOSED ! NOT !USED BLEED !

! ! ! ! ! STARTER ! !CLOSED !PRESSURE !

! ! ! ! ! VALVE ! ! !REGULATOR !

! ! ! ! ! POSITION ! ! !VALVE FOR !

! ! ! ! ! ! ! !CONTROL !

----------------------------------------------------------------------------

! KEY: !

! SDI = 01 from EIU1 !

! SDI = 10 from EIU2 !

!--------------------------------------------------------------------------!

! LABEL ! BIT ! REFRESH ! PARAMETER ! STATUS 0!STATUS 1! COMMENTS !

! ! ! RATE (ms)! DEFINITION ! ! ! !

!-------!-------!----------!---------------!---------!--------!------------!

! ! 11 ! ! OIL LOW PRESS ! !DETECTED! !

! ! ! ! ! !(Eng ! !

! ! ! ! ! ! Not ! !

! ! ! ! ! !Running)! !

! 032 !-------! 125 max !---------------!---------!--------!------------!

! ! 13 ! !VALVE CLOSURE ! ! !FOR CROSS- !

! ! ! !For ENG START ! NO ! YES !BLEED VALVE !

! ! ! ! DEMAND ! ! !CTL AND APU !

! ! ! ! ! ! !ENABLE !

! !-------!----------!---------------!---------!--------!------------!

! ! 19 ! ! CFM 56 FAMILY ! !SELECTED! !

!--------------------------------------------------------------------------!

! ! 17 ! ! LH MAIN ! !COMPRES-! !

! ! ! ! LANDING GEAR ! !SED ! !

! ! ! ! ! ! ! USED FOR !

! ! ! ! ! ! ! TEST !

! ! ! 80 max ! ! ! ! INHIBITION !

! 031 !-------! !---------------!---------!--------! AND !

! ! 18 ! !RH MAIN ! !COMPRES-! LOW TEMP !

! ! ! !LANDING GEAR ! !SED ! !

! ! ! ! ! ! ! !

! !-------! !---------------!---------!--------!------------!

! ! 29 ! ! WAI P/B ! ! OFF ! LOW TEMP !

! ! ! ! ! !SELECTED! !

----------------------------------------------------------------------------

(2) Discrete word

----------------------------------------------------------------------------

! KEY: (e) !

! SDI = 01 or 11 from EIU1 !

! SDI = 10 or 00 from EIU2 !

!--------------------------------------------------------------------------!

! LABEL ! SDI ! BIT ! REFRESH ! PARAMETER !STATUS 0!STATUS 1! COMMENTS !

! ! ! ! RATE (ms) ! DEFINITION ! ! ! !

!-------!-----!-----!-----------!------------!--------!--------!-----------!

! 270 ! (e) ! 13 ! 250 max ! ENGINE !CLOSED ! NOT !USED BLEED !

! ! ! ! ! STARTER ! !CLOSED !PRESSURE !

! ! ! ! ! VALVE ! ! !REGULATOR !

! ! ! ! ! POSITION ! ! !VALVE FOR !

! ! ! ! ! ! ! !CONTROL !

----------------------------------------------------------------------------

! KEY: !

! SDI = 01 from EIU1 !

! SDI = 10 from EIU2 !

!--------------------------------------------------------------------------!

! LABEL ! BIT ! REFRESH ! PARAMETER ! STATUS 0!STATUS 1! COMMENTS !

! ! ! RATE (ms)! DEFINITION ! ! ! !

!-------!-------!----------!---------------!---------!--------!------------!

! ! 11 ! ! OIL LOW PRESS ! !DETECTED! !

! ! ! ! ! !(Eng ! !

! ! ! ! ! ! Not ! !

! ! ! ! ! !Running)! !

! 032 !-------! 125 max !---------------!---------!--------!------------!

! ! 13 ! !VALVE CLOSURE ! ! !FOR CROSS- !

! ! ! !For ENG START ! NO ! YES !BLEED VALVE !

! ! ! ! DEMAND ! ! !CTL AND APU !

! ! ! ! ! ! !ENABLE !

! !-------!----------!---------------!---------!--------!------------!

! ! 19 ! ! CFM 56 FAMILY ! !SELECTED! !

!--------------------------------------------------------------------------!

! ! 15 ! ! ENG MASTER ! ON ! OFF ! USED FOR !

! ! ! ! LEVER OFF ! ! ! AUTOMATIC !

! ! ! ! ! ! ! PRV !

! ! ! ! ! ! ! CLOSURE AT !

! ! ! ! ! ! ! ENGINE !

! ! ! ! ! ! ! SHUTDOWN !

! !-------! !---------------!---------!--------!------------!

! ! 17 ! ! LH MAIN ! !COMPRES-! !

! ! ! ! LANDING GEAR ! !SED ! !

! ! ! ! ! ! ! USED FOR !

! 031 ! ! 80 max ! ! ! ! TEST !

! ! ! ! ! ! ! INHIBITION !

! !-------! !---------------!---------!--------! AND !

! ! 18 ! !RH MAIN ! !COMPRES-! LOW TEMP !

! ! ! !LANDING GEAR ! !SED ! !

! ! ! ! ! ! ! !

! !-------! !---------------!---------!--------!------------!

! ! 29 ! ! WAI P/B ! ! OFF ! LOW TEMP !

! ! ! ! ! !SELECTED! !

----------------------------------------------------------------------------

(3) Discrete word

----------------------------------------------------------------------------

! KEY: (e) !

! SDI = 01 or 11 from EIU1 !

! SDI = 10 or 00 from EIU2 !

!--------------------------------------------------------------------------!

! LABEL ! SDI ! BIT ! REFRESH ! PARAMETER !STATUS 0!STATUS 1! COMMENTS !

! ! ! ! RATE (ms) ! DEFINITION ! ! ! !

!-------!-----!-----!-----------!------------!--------!--------!-----------!

! 270 ! (e) ! 13 ! 200 max ! ENGINE !CLOSED ! NOT !USED BLEED !

! ! ! ! ! STARTER ! !CLOSED !PRESSURE !

! ! ! ! ! VALVE ! ! !REGULATOR !

! ! ! ! ! POSITION ! ! !VALVE FOR !

! ! ! ! ! ! ! !CONTROL !

! ! !-----!-----------!------------!--------!--------!-----------!

! ! ! 29 ! 200 max ! HPV ! NOT ! ENER- !USED FOR !

! ! ! ! ! SOLENOID !ENERGI- ! GIZED !HPV !

! ! ! ! ! ! ZED ! !MONITORING !

----------------------------------------------------------------------------

! KEY: !

! SDI = 01 from EIU1 !

! SDI = 10 from EIU2 !

!--------------------------------------------------------------------------!

! LABEL ! BIT ! REFRESH ! PARAMETER ! STATUS 0!STATUS 1! COMMENTS !

! ! ! RATE (ms)! DEFINITION ! ! ! !

!-------!-------!----------!---------------!---------!--------!------------!

! ! 11 ! ! OIL LOW PRESS ! !DETECTED! !

! ! ! ! ! !(Eng ! !

! ! ! ! ! ! Not ! !

! ! ! ! ! !Running)! !

! 032 !-------! 125 max !---------------!---------!--------!------------!

! ! 13 ! !VALVE CLOSURE ! ! !FOR CROSS- !

! ! ! !For ENG START ! NO ! YES !BLEED VALVE !

! ! ! ! DEMAND ! ! !CTL AND APU !

! ! ! ! ! ! !ENABLE !

! !-------!----------!---------------!---------!--------!------------!

! ! 20 ! ! V2500 FAMILY ! !SELECTED! !

!--------------------------------------------------------------------------!

! ! 15 ! ! ENG MASTER ! ON ! OFF ! USED FOR !

! ! ! ! LEVER OFF ! ! ! AUTOMATIC !

! ! ! ! ! ! ! PRV !

! ! ! ! ! ! ! CLOSURE AT !

! ! ! ! ! ! ! ENGINE !

! ! ! ! ! ! ! SHUTDOWN !

! !-------! !---------------!---------!--------!------------!

! ! 17 ! ! LH MAIN ! !COMPRES-! !

! ! ! ! LANDING GEAR ! !SED ! !

! ! ! ! ! ! ! USED FOR !

! 031 ! ! 80 max ! ! ! ! TEST !

! ! ! ! ! ! ! INHIBITION !

! !-------! !---------------!---------!--------! AND !

! ! 18 ! !RH MAIN ! !COMPRES-! LOW TEMP !

! ! ! !LANDING GEAR ! !SED ! !

! ! ! ! ! ! ! !

! !-------! !---------------!---------!--------!------------!

! ! 29 ! ! WAI P/B ! ! OFF ! LOW TEMP !

! ! ! ! ! !SELECTED! !

----------------------------------------------------------------------------

B. Data Bus from EIU

(1) Numerical word

----------------------------------------------------------------------------

! KEY: (e) (k) !

! SDI = 01 or 11 from EIU1 SDI = 01 from EIU1 !

! SDI = 10 or 00 from EIU2 SDI = 10 from EIU2 !

!--------------------------------------------------------------------------!

!LABEL!SDI!PARAMETER!BINARY! REFRESH !NUMBER OF!OPERATING!RESOLUTION! UNIT !

! ! ! DEFINI- !RANGE ! RATE !SIGNIFI- !RANGE !(approx) ! !

! ! ! TION ! ! (ms) !CANT BITS!Min/Max ! ! !

!-----!---!---------!------!---------!---------!---------!----------!------!

! 114 ! ! PO ! 32 ! 250 max ! 14 ! 2/20 ! 0,002 ! !

!-----!(e)!---------------------------------------------------------! PSIA !

! 264 ! ! PS3 ! 512 ! 125 max ! 14 ! 2/450 ! 0,03 ! !

!-----!---!---------!------!---------!---------!---------!----------!------!

! 316 !(k)! OIL TEMP!2048 ! 125 max ! 12 ! -60 to ! 0,5 ! °C !

! ! ! ! ! ! ! +250 ! ! !

-------------------------------------------------------------------------!

(2) Numerical word

----------------------------------------------------------------------------

! KEY: (e) (k) !

! SDI = 01 or 11 from EIU1 SDI = 01 from EIU1 !

! SDI = 10 or 00 from EIU2 SDI = 10 from EIU2 !

! !

! FORMAT BNR FOR THESE LABELS !

!--------------------------------------------------------------------------!

!LABEL!SDI!PARAMETER!BINARY! REFRESH !NUMBER OF!OPERATING!RESOLUTION! UNIT !

! ! ! DEFINI- !RANGE ! RATE !SIGNIFI- !RANGE !(approx) ! !

! ! ! TION ! ! (ms) !CANT BITS!Min/Max ! ! !

!-----!---!---------!------!---------!---------!---------!----------!------!

! 114 ! ! PO ! 32 ! 250 max ! 14 ! 2/20 ! 0,002 ! !

!-----!(e)!---------------------------------------------------------! PSIA !

! 264 ! ! PS3 ! 512 ! 125 max ! 14 ! 2/450 ! 0,03 ! !

!-----!---!---------!------!---------!---------!---------!----------!------!

! 316 !(k)! OIL TEMP!2048 ! ! 12 ! -60 to ! ! !

! ! ! ! ! ! ! +250 ! ! !

!-----!---!---------!------! 125 max !---------!---------! 0,5 ! °C !

! 322 !(k)! NACELLE ! 512 ! ! 10 ! -55 to ! ! !

! ! ! TEMP ! ! ! ! +375 ! ! !

----------------------------------------------------------------------------

(3) Numerical word

----------------------------------------------------------------------------

! KEY: (e) (k) !

! SDI = 01 or 11 from EIU1 SDI = 01 from EIU1 !

! SDI = 10 or 00 from EIU2 SDI = 10 from EIU2 !

! !

! FORMAT BNR FOR THESE LABELS !

! !

!--------------------------------------------------------------------------!

!LABEL!SDI!PARAMETER!BINARY! REFRESH !NUMBER OF!OPERATING!RESOLUTION! UNIT !

! ! ! DEFINI- !RANGE ! RATE !SIGNIFI- !RANGE ! ! !

! ! ! TION ! ! (ms) !CANT BITS!Min/Max ! ! !

!-----!---!---------!------!---------!---------!---------!----------!------!

! 114 ! ! PO ! 32 ! 200 max ! 14 ! 1,7/15 ! 0,002 ! !

!-----!(e)!---------------------------------------------------------! PSIA !

! 264 ! ! PS3 ! 512 ! 200 max ! 14 ! 1/450 ! 0,03 ! !

!-----!---!---------!------!---------!---------!---------!----------!------!

! 316 !(k)! OIL TEMP!2048 ! ! 12 ! -60 to ! ! !

! ! ! ! ! ! ! +250 ! ! !

!-----!---!---------!------! 125 max !---------!---------! 0,5 ! °C !

! 322 !(k)! NACELLE ! 512 ! ! 10 ! -55 to ! ! !

! ! ! TEMP ! ! ! ! +375 ! ! !

----------------------------------------------------------------------------

C. Output Data Bus from CFDIU (Numerical word)

----------------------------------------------------------------------------

! KEY: !

! SDI = 00 for BMC1 and BMC2 !

! SDI = 01 for BMC1 !

! SDI = 10 for BMC2 !

!--------------------------------------------------------------------------!

! LABEL ! SDI ! PARAMETER DEFINITION ! FORMAT ! REFRESH ! COMMENTS !

! ! ! ! ! RATE (ms)! !

!-------!-------!----------------------!--------!----------!---------------!

! 125 ! 00 ! GMT ! BCD ! 1000 ! !

!-------!-------!----------------------!--------!----------! SEE ARINC 429 !

! 260 ! 00 ! DATE ! BCD ! 1000 ! !

!-------!-------!----------------------!--------!----------!---------------!

! 233 ! ! ! ISO NOT! ! !

! 234 ! 00 ! FLIGHT NUMBER ! EQUAL ! 4000 ! !

! 235 ! ! ! TO 5 ! ! !

! 236 ! ! ! ! ! !

!-------!-------!----------------------!--------!----------! !

! 227 ! 01/10 ! BITE COMMAND CONTROL ! BCD ! 120 ! !

!-------!-------!----------------------!--------!----------! SEE ABD 0018 !

! 301 ! ! ! ISO NOT! ! !

! 302 ! ! AIRCRAFT IDENTIFIER ! EQUAL ! 4000 ! !

! 303 ! ! ! TO 5 ! ! !

! 304 ! ! ! ! ! !

!-------!-------!----------------------!--------!----------! !

! 126 ! 00 ! FLIGHT PHASE ! BNR ! 1000 ! !

!-------!-------!----------------------!--------!----------! !

! 155 ! 00 !AIRCRAFT CONFIGURATION!DISCRETE! 1000 ! !

! ! ! WORD ! WORD ! ! !

----------------------------------------------------------------------------

! KEY: (c) SDI=01 for BMC1 or 10 for BMC2 !

! (d) Used by SDAC1 or SDAC2 for "SYSTEM PAGES" !

! (h) Emission only by BMC2 - (i) Emission only by BMC1 !

! (e) SDI=01 from EIU1 and SDI=10 from BMC2 !

!--------------------------------------------------------------------------!

!LABEL!SDI!PARAMETER!FORMAT!UPD/MSEC ! SIG !OPER RANGE!RESOLUTION! UNIT !

! ! ! DEF ! !MIN/MAX ! BIT !MIN/MAX ! ! !

!-----!---!---------!------!---------!--------!----------!----------!------!

! 140 !(c)!ENG2 PRE-! ! ! ! ! ! !

! (d) ! !COOLER ! BNR ! 125/250 ! 10 ! 0/+512 ! 0,5 ! °C !

! ! !EXCHANGER! ! ! ! ! ! !

! ! !OUTLET ! ! ! ! ! ! !

! ! !TEMPERA- ! ! ! ! ! ! !

! ! !TURE ! ! ! ! ! ! !

!-----!---!---------------------------------------------------------!------!

! 141 !(c)!ENG1 PRE-! ! ! ! ! ! !

! (d) ! !COOLER ! BNR ! 125/250 ! 10 ! 0/+512 ! 0,5 ! °C !

! ! !EXCHANGER! ! ! ! ! ! !

! ! !OUTLET ! ! ! ! ! ! !

! ! !TEMPERA- ! ! ! ! ! ! !

! ! !TURE ! ! ! ! ! ! !

!-----!---!---------------------------------------------------------!------!

! 142 !(c)!ENG2 PRE-! ! ! ! ! ! !

! (d) ! !COOLER ! BNR ! 125/250 ! 10 ! 0/ 512 ! 0,5 ! PSIG !

! ! !EXCHANGER! ! ! ! ! ! !

! ! !INLET ! ! ! ! ! ! !

! ! !PRESSURE ! ! ! ! ! ! !

! ! ! (PR2) ! ! ! ! ! ! !

!-----!---!---------------------------------------------------------!------!

! 143 !(c)!ENG1 PRE-! ! ! ! ! ! !

! (d) ! !COOLER ! BNR ! 125/250 ! 10 ! 0/ 512 ! 0,5 ! PSIG !

! ! !EXCHANGER! ! ! ! ! ! !

! ! !INLET ! ! ! ! ! ! !

! ! !PRESSURE ! ! ! ! ! ! !

! ! ! (PR1) ! ! ! ! ! ! !

!-----!---!---------------------------------------------------------!------!

! 151 !01 !ENG1 ! ! ! ! ! ! !

! (i) ! !TRANSFER-! BNR ! 125/250 ! 10 ! 0/ 512 ! 0,5 ! PSIG !

! ! !RED ! ! ! ! ! ! !

! ! !PRESSURE ! ! ! ! ! ! !

! ! !(PT1) ! ! ! ! ! ! !

!-----!---!---------------------------------------------------------!------!

! 152 !10 !ENG2 ! ! ! ! ! ! !

! (h) ! !TRANSFER-! BNR ! 125/250 ! 10 ! 0/ 512 ! 0,5 ! PSIG !

! ! !RED ! ! ! ! ! ! !

! ! !PRESSURE ! ! ! ! ! ! !

! ! !(PT2) ! ! ! ! ! ! !

!-----!---!---------------------------------------------------------!------!

! 153 !01 !ENG1 HIGH! ! ! ! ! ! !

! (i) ! !PRESSURE ! BNR ! 125/250 ! 14 ! 2/450 ! 0,03 ! PSIG !

! ! !STAGE ! ! ! ! ! ! !

! ! !OUTLET ! ! ! ! ! ! !

! ! !PRESSURE ! ! ! ! ! ! !

! ! !(PS3-P0) ! ! ! ! ! ! !

!-----!---!---------------------------------------------------------!------!

! 154 !10 !ENG2 HIGH! ! ! ! ! ! !

! (h) ! !PRESSURE ! BNR ! 125/250 ! 14 ! 2/450 ! 0,03 ! PSIG !

! ! !STAGE ! ! ! ! ! ! !

! ! !OUTLET ! ! ! ! ! ! !

! ! !PRESSURE ! ! ! ! ! ! !

! ! !(PS3-P0) ! ! ! ! ! ! !

!-----!---!---------------------------------------------------------!------!

! 377 !(c)!EQUIP- ! ! ! ! ! ! !

! ! !MENT ! BCD ! 125/250 ! ! NONE ! NONE ! NONE !

! ! !IDENTI- ! ! ! ! ! ! !

! ! !FICATION ! ! ! ! ! ! !

!-----!---!---------------------------------------------------------!------!

! 356 !(c)!MAINTE- ! ISO !NORMAL ! ! ! ! !

! ! !NANCE ! NOT !MODE 50/ ! ! NONE ! NONE ! NONE !

! ! !DATA ! EQUAL!250 MENU ! ! ! ! !

! ! ! ! TO 5 !MODE SEE ! ! ! ! !

! ! ! ! !ABD0018 ! ! ! ! !

!-----!---!---------------------------------------------------------!------!

! 316 !(e)! OIL ! ! ! ! ! ! !

! ! ! TEMP ! BNR ! 125/250 ! 12 ! -60/250 ! 0,5 ! °C !

! ! ! ! ! ! ! ! ! !

!-----!---!---------------------------------------------------------!------!

! 322 !(e)! NACELLE ! ! ! ! ! ! !

! ! ! TEMP ! BNR ! 125/250 ! 10 ! -55/330 ! 0,5 ! °C !

! ! ! ! ! ! ! ! ! !

----------------------------------------------------------------------------

! KEY: !

! SDI = 00 for BMC1 and BMC2 !

! SDI = 01 for BMC1 !

! SDI = 10 for BMC2 !

!--------------------------------------------------------------------------!

! LABEL ! SDI ! PARAMETER DEFINITION ! FORMAT ! REFRESH ! COMMENTS !

! ! ! ! ! RATE (ms)! !

!-------!-------!----------------------!--------!----------!---------------!

! 125 ! 00 ! GMT ! BCD ! 1000 ! !

!-------!-------!----------------------!--------!----------! SEE ARINC 429 !

! 260 ! 00 ! DATE ! BCD ! 1000 ! !

!-------!-------!----------------------!--------!----------!---------------!

! 233 ! ! ! ISO NOT! ! !

! 234 ! 00 ! FLIGHT NUMBER ! EQUAL ! 4000 ! !

! 235 ! ! ! TO 5 ! ! !

! 236 ! ! ! ! ! !

!-------!-------!----------------------!--------!----------! !

! 227 ! 01/10 ! BITE COMMAND CONTROL ! BCD ! 120 ! !

!-------!-------!----------------------!--------!----------! SEE ABD 0018 !

! 301 ! ! ! ISO NOT! ! !

! 302 ! 00 ! AIRCRAFT IDENTIFIER ! EQUAL ! 4000 ! !

! 303 ! ! ! TO 5 ! ! !

! 304 ! ! ! ! ! !

!-------!-------!----------------------!--------!----------! !

! 126 ! 00 ! FLIGHT PHASE ! BNR ! 1000 ! !

!-------!-------!----------------------!--------!----------! !

! 155 ! 00 !AIRCRAFT CONFIGURATION!DISCRETE! 1000 ! !

! ! ! WORD ! WORD ! ! !

----------------------------------------------------------------------------

! KEY: (c) SDI=01 for BMC1 or 10 for BMC2 !

! (d) Used by SDAC1 or SDAC2 for "SYSTEM PAGES" !

! (h) Emission only by BMC2 - (i) Emission only by BMC1 !

! (e) SDI=01 from EIU1 and SDI=10 from BMC2 !

!--------------------------------------------------------------------------!

!LABEL!SDI!PARAMETER!FORMAT!UPD/MSEC ! SIG !OPER RANGE!RESOLUTION! UNIT !

! ! ! DEF ! !MIN/MAX ! BIT !MIN/MAX ! ! !

!-----!---!---------!------!---------!--------!----------!----------!------!

! 140 !(c)!ENG2 PRE-! ! ! ! ! ! !

! (d) ! !COOLER ! BNR ! 125/250 ! 10 ! 0/+512 ! 0,5 ! °C !

! ! !EXCHANGER! ! ! ! ! ! !

! ! !OUTLET ! ! ! ! ! ! !

! ! !TEMPERA- ! ! ! ! ! ! !

! ! !TURE ! ! ! ! ! ! !

!-----!---!---------------------------------------------------------!------!

! 141 !(c)!ENG1 PRE-! ! ! ! ! ! !

! (d) ! !COOLER ! BNR ! 125/250 ! 10 ! 0/+512 ! 0,5 ! °C !

! ! !EXCHANGER! ! ! ! ! ! !

! ! !OUTLET ! ! ! ! ! ! !

! ! !TEMPERA- ! ! ! ! ! ! !

! ! !TURE ! ! ! ! ! ! !

!-----!---!---------------------------------------------------------!------!

! 142 !(c)!ENG2 PRE-! ! ! ! ! ! !

! (d) ! !COOLER ! BNR ! 125/250 ! 10 ! 0/ 512 ! 0,5 ! PSIG !

! ! !EXCHANGER! ! ! ! ! ! !

! ! !INLET ! ! ! ! ! ! !

! ! !PRESSURE ! ! ! ! ! ! !

! ! ! (PR2) ! ! ! ! ! ! !

!-----!---!---------------------------------------------------------!------!

! 143 !(c)!ENG1 PRE-! ! ! ! ! ! !

! (d) ! !COOLER ! BNR ! 125/250 ! 10 ! 0/ 512 ! 0,5 ! PSIG !

! ! !EXCHANGER! ! ! ! ! ! !

! ! !INLET ! ! ! ! ! ! !

! ! !PRESSURE ! ! ! ! ! ! !

! ! ! (PR1) ! ! ! ! ! ! !

!-----!---!---------------------------------------------------------!------!

! 151 !01 !ENG1 ! ! ! ! ! ! !

! (i) ! !TRANSFER-! BNR ! 125/250 ! 10 ! 0/ 512 ! 0,5 ! PSIG !

! ! !RED ! ! ! ! ! ! !

! ! !PRESSURE ! ! ! ! ! ! !

! ! !(PT1) ! ! ! ! ! ! !

!-----!---!---------------------------------------------------------!------!

! 152 !10 !ENG2 ! ! ! ! ! ! !

! (h) ! !TRANSFER-! BNR ! 125/250 ! 10 ! 0/ 512 ! 0,5 ! PSIG !

! ! !RED ! ! ! ! ! ! !

! ! !PRESSURE ! ! ! ! ! ! !

! ! !(PT2) ! ! ! ! ! ! !

!-----!---!---------------------------------------------------------!------!

! 153 !01 !ENG1 HIGH! ! ! ! ! ! !

! (i) ! !PRESSURE ! BNR ! 125/250 ! 14 ! 2/450 ! 0,03 ! PSIG !

! ! !STAGE ! ! ! ! ! ! !

! ! !OUTLET ! ! ! ! ! ! !

! ! !PRESSURE ! ! ! ! ! ! !

! ! !(PS3-P0) ! ! ! ! ! ! !

!-----!---!---------------------------------------------------------!------!

! 154 !10 !ENG2 HIGH! ! ! ! ! ! !

! (h) ! !PRESSURE ! BNR ! 125/250 ! 14 ! 2/450 ! 0,03 ! PSIG !

! ! !STAGE ! ! ! ! ! ! !

! ! !OUTLET ! ! ! ! ! ! !

! ! !PRESSURE ! ! ! ! ! ! !

! ! !(PS3-P0) ! ! ! ! ! ! !

!-----!---!---------------------------------------------------------!------!

! 377 !(c)!EQUIP- ! ! ! ! ! ! !

! ! !MENT ! BCD ! 125/250 ! ! NONE ! NONE ! NONE !

! ! !IDENTI- ! ! ! ! ! ! !

! ! !FICATION ! ! ! ! ! ! !

!-----!---!---------------------------------------------------------!------!

! 356 !(c)!MAINTE- ! ISO !NORMAL ! ! ! ! !

! ! !NANCE ! NOT !MODE 50/ ! ! NONE ! NONE ! NONE !

! ! !DATA ! EQUAL!250 MENU ! ! ! ! !

! ! ! ! TO 5 !MODE SEE ! ! ! ! !

! ! ! ! !ABD0018 ! ! ! ! !

!-----!---!---------------------------------------------------------!------!

! 316 !(e)! OIL ! ! ! ! ! ! !

! ! ! TEMP ! BNR ! 125/250 ! 12 ! -60/250 ! 0,5 ! °C !

! ! ! ! ! ! ! ! ! !

!-----!---!---------------------------------------------------------!------!

! 322 !(e)! NACELLE ! ! ! ! ! ! !

! ! ! TEMP ! BNR ! 125/250 ! 10 ! -55/375 ! 0,5 ! °C !

! ! ! ! ! ! ! ! ! !

----------------------------------------------------------------------------

D. Data Bus from Valves of EBAS

(1) Data Table to Engine 1

-------------------------------------------------

!LABEL! BIT !PARAMETER ! Status ! Status !

!67/01! !DEFINITION ! 0 ! 1 !

!-----!-----!-----------!-------------!---------!

! ! 11 ! Eng1 OPV !Fully open !Not fully!

! ! ! position ! !open !

!-----!-----!-----------!-------------!---------!

! ! 12 ! Eng1 FAV !Fully open !Not fully!

! ! ! position ! !open !

!-----!-----!-----------!-------------!---------!

! ! 13 ! Eng1 FAV !Fully closed !Not fully!

! ! ! position ! !closed !

!-----!-----!-----------!-------------!---------!

! ! 15 ! Eng1 HPV !Fully closed !Not fully!

! ! ! position ! !closed !

!-----!-----!-----------!-------------!---------!

! ! 17 ! Eng1 PRV !Fully closed !Not fully!

! ! ! position ! !closed !

-------------------------------------------------

(2) Data Table to Engine 2

-------------------------------------------------

!LABEL! BIT !PARAMETER ! Status ! Status !

!66/01! !DEFINITION ! 0 ! 1 !

!-----!-----!-----------!-------------!---------!

! ! 11 ! Eng2 OPV !Fully open !Not fully!

! ! ! position ! !open !

!-----!-----!-----------!-------------!---------!

! ! 12 ! Eng2 FAV !Fully open !Not fully!

! ! ! position ! !open !

!-----!-----!-----------!-------------!---------!

! ! 13 ! Eng2 FAV !Fully closed !Not fully!

! ! ! position ! !closed !

!-----!-----!-----------!-------------!---------!

! ! 15 ! Eng2 HPV !Fully closed !Not fully!

! ! ! position ! !closed !

!-----!-----!-----------!-------------!---------!

! ! 17 ! Eng2 PRV !Fully closed !Not fully!

! ! ! position ! !closed !

-------------------------------------------------

[Rev.10 from 2021] 2026.04.01 04:51:52 UTC