Bleed Pressure-Regulator Valve of the Engine 2 Blocked in the Closed Position or Regulation Too Low

TASK 36-11-00-810-810-A
Bleed Pressure-Regulator Valve of the Engine 2 Blocked in the Closed Position or Regulation Too Low

1. Possible Causes

BMC-2 [1HA2]
VALVE-BLEED PRESS REG [4001HA]
sense line between the bleed-pressure regulator valve (4001HA) and the solenoid (10HA2)
O-RING
SOLENOID-BLEED PRESS REG V CTL, ENG 2 [10HA2]
XDCR-BLEED REGULATED PRESS, ENG 2 [8HA2]
XDCR-BLEED TRANSFER PRESS, ENG 2 [7HA2]
VALVE-HP BLEED [4000HA]
P/BSW-ENG 2 BLEED [4HA2]

2. Job Set-up Information
A. Fixtures, Tools, Test and Support Equipment

REFERENCE	QTY	DESIGNATION
No specific	1	CAP - BLANKING

B. Referenced Information

REFERENCE	DESIGNATION
ESPM 204511
AMM 36-11-00-720-007	Functional Test of the Sense Lines Connected to the Bleed Pressure-Regulator Valve with the Bleed Test Set P/N 98D36003000000
AMM 36-11-00-740-001	BITE Test of the BMC 1(2)
AIPC 36110606
AMM 36-11-15-000-001	Removal of the Bleed Transferred Pressure-Transducer
AMM 36-11-15-400-001	Installation of the Bleed Transferred Pressure-Transducer
AMM 36-11-16-000-001	Removal of the Bleed Regulated Pressure-Transducer
AMM 36-11-16-400-001	Installation of the Bleed Regulated Pressure-Transducer
AMM 36-11-49-000-029	Removal of the Pneumatic Sense Lines in the Pylon
AMM 36-11-49-000-820	Removal of the Pneumatic Sense Lines in the Pylon
AMM 36-11-49-400-029	Installation of the Pneumatic Sense Lines in the Pylon
AMM 36-11-49-400-820	Installation of the Pneumatic Sense Lines in the Pylon
AMM 36-11-51-000-040	Removal of the High Pressure Bleed Valve
AMM 36-11-51-000-042	Removal of the High Pressure Bleed Valve
AMM 36-11-51-400-040	Installation of the High Pressure Bleed Valve
AMM 36-11-51-400-042	Installation of the High Pressure Bleed Valve
AMM 36-11-52-000-040	Removal of the Bleed Pressure-Regulator Valve
AMM 36-11-52-000-042	Removal of the Bleed Pressure Regulator Valve
AMM 36-11-52-400-040	Installation of the Bleed Pressure-Regulator Valve
AMM 36-11-52-400-042	Installation of the Bleed Pressure Regulator Valve
AMM 36-11-52-720-001	Functional Test of the Opening of the Bleed-Pressure Regulator Valve (PRV) with the Bleed Test Set P/N 98D36003000000
AMM 36-11-55-000-001	Removal of the Bleed-Pressure-Regulator Valve Control-Solenoid
AMM 36-11-55-400-001	Installation of the Bleed-Pressure-Regulator Valve Control-Solenoid
AMM 36-11-58-100-803	Cleaning of the Sense Line between the HP Bleed-Override Solenoid and the Pressure Regulating Valve (PRV)

3. Fault Confirmation
Subtask 36-11-00-710-052-A ** ON A/C NOT FOR ALL

A. Test
(1) Do the BITE test of the BMC2 AMM 36-11-00-740-001.

4. Fault Isolation

CAUTION: BE CAREFUL WITH THE SEMI-FLEXIBLE SENSE LINE. DEFORMATION OF THE RIGID PART OR LARGE DEFORMATION OF THE FLEXIBLE PART CAN QUICKLY CAUSE LEAKAGE.

CAUTION: USE TWO WRENCHES DURING DISCONNECTION OF THE SENSE LINE, ONE TO MAINTAIN THE FIXED NUT AND THE SECOND ONE TO LOOSEN/TIGHTEN THE SENSE LINE COUPLING.

Subtask 36-11-00-810-266-A ** ON A/C NOT FOR ALL

A. If the BITE test gives a fault message related to the BMC-2 [1HA2]

Do the related trouble shooting procedure.

Subtask 36-11-00-810-051-H ** ON A/C NOT FOR ALL

DELETED

Subtask 36-11-00-810-051-I ** ON A/C NOT FOR ALL

B. If the test do not give a fault message related to the BMC2 and if the fault is identified by the maintenance message
PRESS REG-V 4001HA2 OR SOL 10HA2 OR SENSE LINE:

Do a check of the sense line unions and the clamps between the bleed- pressure regulator valve (4001HA) and the solenoid (10HA2).

(1) If the unions are loose:

Tighten them.

(2) If the unions are correctly tightened:

Do a check of the opening of the bleed-pressure regulator valve AMM 36-11-52-720-001.

(a) If the bleed-pressure regulator valve does not open:

Replace the VALVE-BLEED PRESS REG [4001HA] AMM 36-11-52-000-042 and AMM 36-11-52-400-042.

(b) If the bleed-pressure regulator valve opens:

Do a leakage check of the sense line between the bleed-pressure regulator valve and the control solenoid of the bleed-pressure regulator valve AMM 36-11-00-720-007.

1 If the pressure decreases very slowly:

Replace the VALVE-BLEED PRESS REG [4001HA] AMM 36-11-52-000-042 and AMM 36-11-52-400-042.

2 If the pressure decreases to 0 bar (0 psi) in less than 20 seconds:

Do an internal leak check of the control solenoid bleed-pressure regulator valve.
Disconnect the sense line at the control solenoid of the bleed-pressure regulator valve.
Put a CAP - BLANKING on the sense line.
Pressurize the sense line to 2.07 bar (30 psi), then close the shutoff valve of the pressure source.

a If the pressure decreases:

Repair or replace the sense line between the bleed-pressure regulator valve (4001HA) and the solenoid (10HA2) AMM 36-11-49-000-820 and AMM 36-11-49-400-820.

b If the pressure stays constant:

Remove the bleed-pressure-regulator valve control-solenoid AMM 36-11-55-000-001.
Do a visual inspection of the O-ring at the bottom of the bleed-pressure-regulator valve control-solenoid.
* If the O-ring is damaged:
** Install a new O-RING AIPC 36110606.
** Install the bleed-pressure-regulator valve control-solenoid AMM 36-11-55-400-001.
* If the O-ring has no damage:
** Install a new O-RING AIPC 36110606.
** Replace the SOLENOID-BLEED PRESS REG V CTL, ENG 2 [10HA2] AMM 36-11-55-400-001.

(3) If the fault continues:

Do a check of the correct indication of the bleed-regulated pressure transducer (8HA2).
On the AIR control panel 30VU, push the APU BLEED pushbutton switch and set the X-BLEED selector switch to OPEN.
On the ECAM BLEED page, do a check of the pressure indications of the two systems.

(a) If the pressure indication of the defective system is a minimum of 0.55 bar (8 psi) less than the indication of the opposite system:

Replace the XDCR-BLEED REGULATED PRESS, ENG 2 [8HA2] AMM 36-11-16-000-001 and AMM 36-11-16-400-001.

1 If the fault continues:

Replace the XDCR-BLEED TRANSFER PRESS, ENG 2 [7HA2] AMM 36-11-15-000-001 and AMM 36-11-15-400-001.

(4) If the fault continues:

Replace the VALVE-HP BLEED [4000HA] AMM 36-11-51-000-042 and AMM 36-11-51-400-042.

(5) If the fault continues:

Replace the P/BSW-ENG 2 BLEED [4HA2] ESPM 204511.

Subtask 36-11-00-810-051-L ** ON A/C NOT FOR ALL

B. If the test do not give a fault message related to the BMC2 and if the fault is identified by the maintenance message
PRESS REG-V 4001HA2 or SOL 10HA2 or SENSE LINE:

Do a check of the sense line unions and the clamps between the bleed-pressure regulator valve (4001HA) and the solenoid (10HA2).