W DOC AIRBUS | TSM A320F

The Bleed Pressure-Regulator Valve of the Engine 1 is Shown Closed Amber on the Lower ECAM DU

TASK 36-11-00-810-903-A
The Bleed Pressure-Regulator Valve of the Engine 1 is Shown Closed Amber on the Lower ECAM DU

1. Possible Causes
  • XDCR-BLEED TRANSFER PRESS, ENG 1 [7HA1]
  • VALVE-BLEED PRESS REG [4001HA]
  • SOLENOID-BLEED PRESS REG V CTL, ENG 1 [10HA1]
  • sense line between the bleed pressure-regulator valve (4001HA) and the control solenoid (10HA1)
  • wiring
2. Job Set-up Information
 A. Referenced Information
REFERENCE
DESIGNATION
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)
ASM 361101
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 36-11-15-720-001
Functional Test of the Bleed Transferred Pressure-Transducer with the Bleed Test Set P/N 98D36003000000
AMM 36-11-49-000-029
Removal of the Pneumatic Sense Lines in the Pylon
AMM 36-11-49-000-042
Removal of the Pylon Interface Duct
AMM 36-11-49-400-029
Installation of the Pneumatic Sense Lines in the Pylon
AMM 36-11-49-400-042
Installation of the Pylon Interface Duct
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 36-11-55-000-001
Removal of the Bleed-Pressure-Regulator Valve Control-Solenoid
AMM 36-11-55-400-001
Installation of the Bleed-Pressure-Regulator Valve Control-Solenoid
3. Fault Confirmation
Subtask 36-11-00-710-252-A ** ON A/C NOT FOR ALL
A. Test
   (1) Do the BITE test of the BMC1 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 36-11-00-810-153-A ** ON A/C NOT FOR ALL
A. If the test gives a maintenance message:
  • Do the trouble shooting procedure related to the maintenance message.
   (1) If there is no maintenance message:
     (a) If the test is not OK:
     (b) If the test is OK:
       1 If the fault continues:
         a If the fault continues:
  • do the functional test of the upstream sense line between the bleed pressure-regulator valve (4001HA) and the control solenoid (10HA1) AMM 36-11-00-720-007.
    * If the pressure decreases to 0 psig in less than 20 seconds:
    ** replace the related sense line between the bleed pressure-regulator valve (4001HA) and the control solenoid (10HA1) AMM 36-11-49-000-029 and AMM 36-11-49-400-029.
    * If the pressure drop is not high:
    ** do a check and repair the wiring :
    . from the FULLY CLOSED signal of the BMC1 (1HA1) to the bleed pressure-regulator valve (4001HA)
    . from pin A/5 of the bleed pressure-regulator valve (4001HA) to the first terminal block ASM 361101.
Subtask 36-11-00-810-153-C ** ON A/C NOT FOR ALL
A. If the test gives a maintenance message:
  • Do the trouble shooting procedure related to the maintenance message.
   (1) If there is no maintenance message:
     (a) If the test is not OK:
     (b) If the test is OK:
       1 If the fault continues:
         a If the fault continues:
  • Do the functional test of the upstream sense line between the bleed pressure-regulator valve (4001HA) and the control solenoid (10HA1) AMM 36-11-00-720-007.

    * If the pressure decreases to 0 psig in less than 20 seconds:
    * - Replace the related sense line between the bleed pressure-regulator valve (4001HA) and the control solenoid (10HA1) AMM 36-11-49-000-042 and AMM 36-11-49-400-042.

    * If the pressure decreases by a small value:
    * - Do a check and repair the wiring :
    . From pin AA/2B of the BMC1 (1HA1) to pin A/5 of the bleed pressure-regulator valve (4001HA)
    . From pin A/5 of the bleed pressure-regulator valve (4001HA) to the first terminal block ASM 361101.
Subtask 36-11-00-710-253-A ** ON A/C NOT FOR ALL
B. After the subsequent flight, make sure that the fault does not continue.
[Rev.8 from Aug 2018] 2026.04.04 04:33:49 UTC
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