(1) Do a check for the correct indication of the pressure transducer (8HA2).
(a) On the AIR control panel 30VU, with the APU BLEED pushbutton switch pushed and the X-BLEED selector switch set to OPEN, do a check on the ECAM BLEED page of the pressure indications of the two systems.
1 If the pressure indication of the defective system is 8 psi
_ (0.5515 bar) minimum more than that of the opposite system:
1
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- replace the XDCR-BLEED REGULATED PRESS, ENG 2 (8HA2) (Ref.
AMM TASK 36-11-16-000-001) and (Ref. AMM TASK 36-11-16-400-
001).
2_ If the difference in the pressure indication is not important
(less than 8 psig):
- replace the VALVE-BLEED PRESS REG (4001HA) (Ref. AMM TASK
36-11-52-000-040) and (Ref. AMM TASK 36-11-52-400-040).
(2) If the fault continues:
-replace the BMC-2 (1HA2) (Ref. AMM TASK 36-11-34-000-001) and (Ref. AMM TASK 36-11-34-400-001).
B. After the subsequent flight, make sure that the fault does not continue.
1
-EFF : ALL
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Bleed Pressure Regulator Valve of the Engine 1 Blocked in the Closed Position or Regulation Too Low
1. Possible Causes_______________
-VALVE-BLEED PRESS REG (4001HA)
-SOLENOID-BLEED PRESS REG V CTL, ENG 1 (10HA1)
-XDCR-BLEED REGULATED PRESS, ENG 1 (8HA1)
-sense line
2. Job Set-up Information______________________
A. Referenced Information
-------------------------------------------------------------------------------
REFERENCE DESIGNATION
-------------------------------------------------------------------------------
AMM 36-11-16-000-001 Removal of the Bleed Regulated Pressure Transducer (8HA1,8HA2)
AMM 36-11-16-400-001 Installation of the Bleed Regulated Pressure Transducer (8HA1,8HA2)
AMM 36-11-52-000-040 Removal of the Bleed Pressure-Regulator Valve (4001HA)
AMM 36-11-52-400-040 Installation of the Bleed Pressure-Regulator Valve (4001HA)
AMM 36-11-55-000-001 Removal of the Bleed-Pressure-Regulator Valve Control-Solenoid (10HA1,10HA2)
AMM 36-11-55-400-001 Installation of the Bleed-Pressure-Regulator Valve Control-Solenoid (10HA1,10HA2)
3. Fault Confirmation__________________
A. Test
(1) Not applicable.
4. Fault Isolation_______________
A. If the fault is identified by the maintenance message:
PRESS REG-V 4001HA1 or SOL 10HA1 or SENSE LINE
-do a check of the sense line unions and clamps between the bleed pressure regulator valve (4001HA) and the solenoid (10HA1).
(1) If the unions are loose:
-tighten them.
1
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(2) If the unions are correctly tightened:
-do a check of the opening of the bleed pressure regulator valve
-disconnect the sense line between the bleed pressure regulator valve and the bleed pressure regulator valve control solenoid at the bleed pressure regulator valve. Put a blanking cap on the union of the pressure regulator valve.
-do a check of the opening of the bleed pressure regulator valve. Apply 20 psi (1.3789 bar) at its test port. The visual indicator must show that the bleed pressure regulator valve is fully open.
(a)
If the bleed pressure regulator valve does not open:
-replace the VALVE-BLEED PRESS REG (4001HA) (Ref. AMM TASK 36-11-52-000-040) and (Ref. AMM TASK 36-11-52-400-040).
(b)
If the bleed pressure regulator valve opens:
-do a leakage check of the sense line between the bleed pressure regulator valve and the bleed pressure regulator valve control solenoid. Pressurize the sense line of the bleed pressure regulator valve and its related solenoid to 30 psi (2.0684 bar) and close the shut-off valve of the pressure source.
1_ If the pressure decreases very slowly:
- replace the VALVE-BLEED PRESS REG (4001HA) (Ref. AMM TASK
36-11-52-000-040) and (Ref. AMM TASK 36-11-52-400-040).
2 If the pressure decreases to "0" psig in less than 20 seconds: 中国航空网 www.aero.cn 航空翻译 www.aviation.cn 本文链接地址：A320 Trouble Shooting Manual 排故手册 PNEUMATIC(24)
