W DOC AIRBUS | TSM A320F

Loss of Automatic Electrical Closure for the Bleed Pressure Regulator Valve on Engine 2

TASK 36-11-00-810-814-A
Loss of Automatic Electrical Closure for the Bleed Pressure Regulator Valve on Engine 2

1. Possible Causes
  • wiring
  • VALVE-BLEED PRESS REG [4001HA]
  • SOLENOID-BLEED PRESS REG V CTL, ENG 2 [10HA2]
  • P/BSW-ENG 2 BLEED [4HA2]
2. Job Set-up Information
 A. Referenced Information
REFERENCE
DESIGNATION
AMM 24-41-00-861-002
Energize the Aircraft Electrical Circuits from the External Power
AMM 24-41-00-862-002
De-energize the Aircraft Electrical Circuits Supplied from the External Power
AMM 31-60-00-860-001
EIS Start Procedure
AMM 31-60-00-860-002
EIS Stop Procedure
ASM 361102
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
AMM 36-12-00-860-001
Pressurization of the Bleed System with the APU
AMM 71-00-00-710-003
Engine Automatic Start
3. Fault Confirmation
Subtask 36-11-00-860-056-A ** ON A/C NOT FOR ALL
A. Job Set-up
   (1) Aircraft Maintenance Configuration
     (a) Energize the aircraft electrical circuits
AMM 24-41-00-861-002.
     (b) Do the EIS start procedure (Upper ECAM DU and lower ECAM DU only)
AMM 31-60-00-860-001.
Subtask 36-11-00-710-060-A ** ON A/C NOT FOR ALL
B. Test
   (1) Approximately thirty minutes after the engine shutdown, on the AIR COND control panel 30VU, do a check of the position of the ENG 2 BLEED pushbutton switch.
NOTE: During the engine shutdown, the bleed-pressure regulator valve can close slowly, without closure command. The cause of this slow closure can be a decreased segmentation play.
     (a) If the pushbutton switch is pushed (system on):
  • On the ECAM control panel 11VU, push the BLEED key (the BLEED page comes into view on the lower ECAM DU).
  • On the BLEED page, do a check of the symbol of the bleed-pressure regulator valve (4001HA).
       1 If the symbol is crossline green:
  • No more maintenance is necessary.
       2 If the symbol is in line green:
  • Pressurize the bleed system with the APU AMM 36-12-00-860-001 or with the engine at idle AMM 71-00-00-710-003.
  • If the bleed system is pressurized with the engine at idle, release the ENG 2 BLEED pushbutton switch (the OFF legend comes on).
  • On the BLEED page, do a check of the symbol of the bleed-pressure regulator valve (4001HA).
         a If the symbol is crossline green:
  • No more maintenance is necessary.
         b If the symbol is in line green:
  • Go to Para. 4.A.
     (b) If the pushbutton switch is released (system off):
  • Go to Para. 4.A.
4. Fault Isolation
Subtask 36-11-00-810-055-B ** ON A/C NOT FOR ALL
A. Do a check of the visual position indicator of the bleed pressure regulator valve.
   (1) If the visual position indicator is in the closed position:
  • disconnect the electrical connector 4001HA-A and make sure that there is continuity between pin A/5 and A/3.
     (a) If there is continuity:
  • on the wiring side, do a check for ground at the connector 4001HA-A pin 3.
       1 If there is a ground signal:
  • do a check and repair the wiring from the bleed pressure regulator valve 4001HA-A pin A/5 and the BMC2 pin AA/2B ASM 361102.
       2 If there is no ground signal:
  • do a check and repair the wiring from the connector 4001HA-A pin 3 to the ground point ASM 361102.
     (b) If there is no continuity:
   (2) If the visual position indicator is in the open position:
  • disconnect the sense line between the bleed pressure regulator valve and the bleed-pressure-regulated valve-control solenoid.
     (a) If the bleed pressure regulator valve is closed:
     (b) If the bleed pressure regulator valve is not closed:
     (c) If the fault continues:
  • replace the P/BSW-ENG 2 BLEED [4HA2] .
       1 If the fault continues:
  • do a check and repair the wiring ASM 361102 between:
    . pin 2 of the AIR BLEED/ENG 2/CTL circuit breaker (3HA2) and pin AA/8A of the BMC 2 (1HA2)
    . pin 2 of the AIR BLEED/ENG 2/CTL circuit breaker and pin A/D2 of the ENG 2 BLEED pushbutton switch (4HA2)
    . pin AA/7A of the BMC 2 and pin A/D1 of the ENG 2 BLEED pushbutton switch
    . pin A/D3 of the ENG 2 BLEED pushbutton switch and pin A/1 of the engine 2 bleed pressure regulator valve control solenoid (10HA2)
    . pin A/2 of the engine 2 bleed pressure regulator valve control solenoid and the ground.
Subtask 36-11-00-810-055-C ** ON A/C NOT FOR ALL
A. Do a check of the visual position indicator of the bleed pressure-regulator valve.
   (1) If the visual position indicator is in the closed position:
  • Disconnect the electrical connector 4001HA-A and make sure that there is continuity between pins A/5 and A/3 ASM 361102.
     (a) If there is continuity:
  • On the wiring side, do a check for ground at the connector 4001HA-A pin 3.
       1 If there is a ground signal:
  • Do a check and repair the wiring from the bleed pressure-regulator valve 4001HA-A pin A/5 and the BMC2 pin AA/2B ASM 361102.
       2 If there is no ground signal:
  • Do a check and repair the wiring from the connector 4001HA-A pin 3 to the ground point ASM 361102.
     (b) If there is no continuity:
   (2) If the visual position indicator is in the open position:
  • Disconnect the sense line between the bleed pressure-regulator valve and the bleed pressure-regulator valve control-solenoid.
     (a) If the bleed pressure-regulator valve is closed:
     (b) If the bleed pressure-regulator valve is not closed:
     (c) If the fault continues:
  • Replace the P/BSW-ENG 2 BLEED [4HA2] .
       1 If the fault continues:
  • Do a check and repair the wiring ASM 361102 between:
    . Pin 2 of the AIR BLEED/ENG 2/CTL circuit breaker (3HA2) and pin AA/8A of the BMC 2 (1HA2)
    . Pin 2 of the AIR BLEED/ENG 2/CTL circuit breaker and pin A/D2 of the ENG 2 BLEED pushbutton switch (4HA2)
    . Pin AA/7A of the BMC 2 and pin A/D1 of the ENG 2 BLEED pushbutton switch
    . Pin A/D3 of the ENG 2 BLEED pushbutton switch and pin A/1 of the engine 2 bleed pressure-regulator valve control-solenoid (10HA2)
    . Pin A/2 of the engine 2 bleed pressure-regulator valve control solenoid and the ground.
Subtask 36-11-00-710-061-A ** ON A/C NOT FOR ALL
B. Do the test given in Para. 3.
5. Close-up
Subtask 36-11-00-860-071-A ** ON A/C NOT FOR ALL
A. Put the aircraft back to its initial configuration.
   (1) Do the EIS stop procedure
AMM 31-60-00-860-002.
   (2) On the ECAM control panel, set the UPPER DISPLAY and LOWER DISPLAY potentiometers to OFF.
   (3) De-energize the aircraft electrical circuits
AMM 24-41-00-862-002.
[Rev.8 from Aug 2018] 2026.04.04 04:33:42 UTC
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