Bleed Pressure-Regulator Valve of the Engine 1 Blocked in the Open Position or Regulation Failure

TASK 36-11-00-810-807-A
Bleed Pressure-Regulator Valve of the Engine 1 Blocked in the Open Position or Regulation Failure

1. Possible Causes

XDCR-BLEED REGULATED PRESS, ENG 1 [8HA1]
VALVE-BLEED PRESS REG [4001HA]
BMC-1 [1HA1]
SENSE LINE 6

2. Job Set-up Information
A. Referenced Information

REFERENCE	DESIGNATION
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 36-11-34-000-001	Removal of the BMC
AMM 36-11-34-400-001	Installation of the BMC
AMM 36-11-49-000-026	Removal of the Sense Line between the Bleed Pressure-Regulator Valve (PRV) and the Pylon Interface
AMM 36-11-49-000-028	Removal of the Sense Line between the Pylon Interface and the Duct Assy
AMM 36-11-49-400-026	Installation of the Sense Line between the Bleed Pressure-Regulator Valve (PRV) and the Pylon Interface
AMM 36-11-49-400-028	Installation of the Sense Line between the Pylon Interface and the Duct Assy
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 36-11-52-790-001	Leak Test of the Bleed-Pressure Regulator Valve with the Engine in Operation
AMM 36-22-00-790-001	Leak Check on all the Bleed Air Ducts and Packs Components

3. Fault Confirmation
Subtask 36-11-00-710-094-B ** ON A/C NOT FOR ALL

A. Test
(1) Not applicable.

Subtask 36-11-00-710-094-C ** ON A/C NOT FOR ALL

A. Test
(1) Not applicable.

Subtask 36-11-00-710-094-O ** ON A/C NOT FOR ALL

A. Test
(1) Not applicable.

4. Fault Isolation
Subtask 36-11-00-810-073-B ** ON A/C NOT FOR ALL

A. If the fault symptom is identified by the maintenance message:
PRESS REG-V 4001HA1
(1) Do a check for the correct indication of the pressure transducer (8HA1).
(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 (0.5516 bar) minimum more than that of the opposite system:

replace the XDCR-BLEED REGULATED PRESS, ENG 1 [8HA1] AMM 36-11-16-000-001 and AMM 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] AMM 36-11-52-000-040 and AMM 36-11-52-400-040.

(2) If the fault continues:

replace the BMC-1 [1HA1] AMM 36-11-34-000-001 and AMM 36-11-34-400-001.

Subtask 36-11-00-810-073-C ** ON A/C NOT FOR ALL

A. If the fault symptom is identified by the maintenance message:
PRESS REG-V 4001HA1
(1) Do a check for correct indication of the pressure transducer (8HA1).
(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 of the pressure indications of the two systems on the ECAM BLEED page.
1 If the pressure indication of the defective system is 8 psi (0.55 bar) minimum more than the indication of the opposite system:

Replace the XDCR-BLEED REGULATED PRESS, ENG 1 [8HA1] AMM 36-11-16-000-001 and AMM 36-11-16-400-001.

2 If the difference in the pressure indication is less than 8 psig:

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

(2) If the fault continues:

Replace the BMC-1 [1HA1] AMM 36-11-34-000-001 and AMM 36-11-34-400-001.

Subtask 36-11-00-810-073-U ** ON A/C NOT FOR ALL

replace the XDCR-BLEED REGULATED PRESS, ENG 1 [8HA1] AMM 36-11-16-000-001 and AMM 36-11-16-400-001.

2 If the difference in the pressure indication is less than 8 psig:

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

(2) Do the leak test of the related VALVE-BLEED PRESS REG [4001HA] and examine the SENSE LINE 6 (Sense Line between Bleed Pressure-Regulator Valve and the duct assembly) AMM 36-11-52-790-001.

NOTE: Is not possible to use aluminium foil to do the leak test in the sense line. Use the Dry Developer Material method instead.

(a) If there are leaks in the SENSE LINE 6 :

repair or replace the SENSE LINE 6 AMM 36-11-49-000-026 AMM 36-11-49-400-026 AMM 36-11-49-000-028 AMM 36-11-49-400-028.

(b) If there are no leaks in the SENSE LINE 6 or if the fault continues:

go to the next step.

(3) If the fault continues:

replace the BMC-1 [1HA1] AMM 36-11-34-000-001 and AMM 36-11-34-400-001.

Subtask 36-11-00-700-050-A ** ON A/C NOT FOR ALL

B. Get the post flight report
(1) If the class 1 fault message PRESS REG-V 4001HA1(2) and the ECAM warning AIR ENG 1(2) BLEED FAULT came into view during the flight phases 3, 4 or 5, get the ENG TAKE OFF REPORT in the MCDU and do a check of the pack values:
(a) If the pack value is 00 or 01 (the pack was off during the last take off):
1 Do the leak check of all the bleed air ducts and pack components AMM 36-22-00-790-001.
2 Do a visual inspection of the bleed air ducts and items of equipment downstream the Overpressure Valve (OPV) along the pylon and center fuselage to the starter valves, flow control valves, HP ground connectors, pressure service check valves and APU check valve but not the wing ducting. Make sure that there are no deformations and be very careful when you do the check of the bellows.
a If there is damage or deformations, repair or replace the damaged duct or equipment.

Subtask 36-11-00-710-095-A ** ON A/C NOT FOR ALL

C. After the subsequent flight, make sure that the fault does not continue.

[Rev.8 from Aug 2018] 2026.04.04 04:33:40 UTC