W DOC AIRBUS | TSM A320F

Loss of or Accidental Automatic Closure of the Bleed Pressure-Regulator Valve of the Engine 1

TASK 36-11-00-810-863-A
Loss of or Accidental Automatic Closure of the Bleed Pressure-Regulator Valve of the Engine 1

1. Possible Causes
  • wiring
  • SOLENOID-BLEED PRESS REG V CTL, ENG 1 [10HA1]
  • P/BSW-ENG 1 BLEED [4HA1]
  • C/B-AIR BLEED/ENG 1/CTL [3HA1]
  • BMC-1 [1HA1]
2. Job Set-up Information
 A. Referenced Information
REFERENCE
DESIGNATION
TSM TASK 24-00-00-810-803-A
Circuit Breaker Tripped and/or C/B TRIPPED Warning
AMM 36-11-00-740-001
BITE Test of the BMC 1(2)
ASM 361101
AMM 36-11-34-000-001
Removal of the BMC
AMM 36-11-34-400-001
Installation of the BMC
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 36-11-00-710-174-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
Subtask 36-11-00-865-059-A ** ON A/C NOT FOR ALL
A. Table of the circuit breakers used in this procedure:
PANELDESIGNATIONFINLOCATION
** ON A/C NOT FOR ALL
49VUAIR BLEED/ENG 1/CTL3HA1D12
49VUAIR BLEED/ENG 1/MONG2HA1D11
Subtask 36-11-00-810-113-A ** ON A/C NOT FOR ALL
B. If the test gives the maintenance message:
BMC1 or SOLENOID 10HA1 CKT
  • do a check of the status of the circuit breaker (3HA1).
   (1) If the circuit breaker (3HA1) is closed:
  • do a check for 28VDC at pin A/1 of the connector of the bleed pressure-regulator valve control-solenoid (10HA1) with the ENG 1 BLEED pushbutton switch (4HA1) released (OFF legend on).
     (a) If there is 28VDC:
  • do a check for ground at pin A/2 of the connector of the bleed pressure-regulator valve control-solenoid (10HA1).
       1 If there is no ground signal:
  • repair the wiring from the pin A/2 to the ground point.
       2 If there is a ground signal:
     (b) If there is no 28VDC:
  • do a check for 28VDC at pin A/D2 of the ENG 1 BLEED pushbutton switch (4HA1).
       1 If there is 28VDC:
  • replace the P/BSW-ENG 1 BLEED [4HA1] .
         a If the fault continues:
  • do a check and repair the wiring from the bleed pressure-regulator valve control-solenoid to the ENG 1 BLEED pushbutton switch, pin A/1 to pin A/D3.
       2 If there is no 28VDC:
  • do a check and repair the wiring from the ENG 1 BLEED pushbutton switch pin A/D2 to the circuit breaker 3HA1 pin 2.
         a If the fault continues:
  • replace the C/B-AIR BLEED/ENG 1/CTL [3HA1] .
   (2) If the circuit breaker (3HA1) is tripped:
   (3) Check of the automatic closure of the bleed pressure-regulator valve.
     (a) If there is no 28VDC:
  • do a check and repair the wiring from the BMC1 pin AA/8A to the circuit breaker 3HA1 pin 2.
     (b) If there is 28VDC:
  • do a check of the wiring between pin A/D1 of the ENG 1 BLEED pushbutton switch and pin AA/7A of the BMC1.
       1 If there is continuity:
  • replace the P/BSW-ENG 1 BLEED [4HA1]
         a If the fault continues:
       2 If there is no continuity:
  • repair the wiring between pin A/D1 of the ENG 1 BLEED pushbutton switch and pin AA/7A of the BMC1 ASM 361101.
Subtask 36-11-00-810-113-B ** ON A/C NOT FOR ALL
B. If the test gives the maintenance message:
BMC1 OR SOLENOID 10HA1 CKT
NOTE: If the maintenance message BMC1 OR SOLENOID 10HA1 CKT comes into view with no associated ECAM warning, no trouble shooting procedure is necessary.
  • Do a check of the status of the circuit breaker (3HA1).
   (1) If the circuit breaker (3HA1) is closed:
  • Do a check for 28 VDC at pin A/1 of the connector of the bleed pressure regulator valve control solenoid (10HA1) with the ENG 1 BLEED pushbutton switch (4HA1) released (OFF legend on).
     (a) If there is 28 VDC:
  • Do a check for ground at pin A/2 of the connector of the bleed pressure regulator valve control solenoid (10HA1).
       1 If there is no ground signal:
  • Repair the wiring from the pin A/2 to the ground point.
       2 If there is a ground signal:
     (b) If there is no 28 VDC:
  • Do a check for 28 VDC at pin A/D2 of the ENG 1 BLEED pushbutton switch (4HA1).
       1 If there is 28 VDC:
  • Replace the P/BSW-ENG 1 BLEED [4HA1] .
         a If the fault continues:
  • Do a check and repair the wiring from the pin A/1 of the bleed pressure regulator valve control solenoid to the pin A/D3 of the ENG 1 BLEED pushbutton switch.
       2 If there is no 28 VDC:
  • Do a check and repair the wiring from the pin A/D2 of the ENG 1 BLEED pushbutton switch to the pin 2 of the circuit breaker 3HA1.
         a If the fault continues:
  • Replace the C/B-AIR BLEED/ENG 1/CTL [3HA1] .
   (2) If the circuit breaker (3HA1) is tripped:
   (3) Check of the automatic closure of the bleed pressure regulator valve (4001HA).
     (a) If there is no 28 VDC:
  • Do a check and repair the wiring between pin AA/8A of the BMC1 and pin 2 of the circuit breaker 3HA1.
     (b) If there is 28 VDC:
  • Do a check of the wiring between pin A/D1 of the ENG 1 BLEED pushbutton switch and pin AA/7A of the BMC1.
       1 If there is continuity:
  • Replace the P/BSW-ENG 1 BLEED [4HA1] .
         a If the fault continues:
       2 If there is no continuity:
  • Repair the wiring between pin A/D1 of the ENG 1 BLEED pushbutton switch and pin AA/7A of the BMC1 ASM 361101.
Subtask 36-11-00-710-175-A ** ON A/C NOT FOR ALL
C. Do the test given in Para. 3.
[Rev.8 from Aug 2018] 2026.04.04 04:33:46 UTC
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