Low Bleed Pressure of Engine 1 in Cruise

TASK 36-11-00-810-A40-A
Low Bleed Pressure of Engine 1 in Cruise

1. Possible Causes

2. Job Set-up Information
A. Referenced Information

REFERENCE	DESIGNATION
AMM 36-11-00-740-802	BITE Test of the Engine Bleed Air System (EBAS) (System Test)
AMM 36-11-16-000-802	Removal of the Bleed Regulated Pressure-Transducer
AMM 36-11-16-400-802	Installation of the Bleed Regulated Pressure-Transducer
AMM 36-11-16-720-802	Functional Test of the Bleed Regulated Pressure-Transducer with the Bleed Test Set P/N 98D36109001000
AMM 36-11-51-000-802	Removal of the HP Bleed Valve
AMM 36-11-51-400-802	Installation of the HP Bleed Valve
AMM 36-11-51-720-804	Functional Test of the HP Bleed Valve with the Test Set P/N 98D36109001000
AMM 36-11-52-000-802	Removal of the Bleed Pressure-Regulator Valve
AMM 36-11-52-400-802	Installation of the Bleed Pressure-Regulator Valve
AMM 36-11-52-720-811	Functional Test of the Pressure Regulator Valve with the Test Set P/N 98D36109001000

3. Fault Confirmation
Subtask 36-11-00-710-507-A ** ON A/C NOT FOR ALL

A. Test
(1) Do the BITE test EBAS AMM 36-11-00-740-802.

4. Fault Isolation
Subtask 36-11-00-810-497-A ** ON A/C NOT FOR ALL

A. If the test gives a maintenance message:

(1) If there is no maintenance message:
(a) Do a funtional test of the Bleed valve AMM 36-11-52-720-811.
(b) If the test is not OK:

Subtask 36-11-00-810-526-A ** ON A/C NOT FOR ALL

B. If the fault continues:
(1) Do a functional test of the Bleed pressure sensor AMM 36-11-16-720-802.
(a) If the test is not OK:

Replace XDCR-BLEED REGULATED PRESS, ENG 1 [8HA1] AMM 36-11-16-000-802 and AMM 36-11-16-400-802.

Subtask 36-11-00-810-527-A ** ON A/C NOT FOR ALL

C. If the fault continues:
(1) Do a functional test of the high pressure valve AMM 36-11-51-720-804.
(a) If the test is not OK:

Subtask 36-11-00-710-508-A ** ON A/C NOT FOR ALL

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

[Rev.8 from Aug 2018] 2026.04.04 04:33:58 UTC