Cold Flow Path (1) Monitoring Failure

TASK 36-11-00-810-968-A
Cold Flow Path (1) Monitoring Failure

1. Possible Causes

VALVE-FAN AIR, ENG1 [9HA1]
EXCHANGER-BLEED AIR PRECOOL [7150HM1]
sense line

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 36-11-44-000-802	Removal of the Bleed-Air Precooler-Exchanger Cold-Inlet
AMM 36-11-44-400-802	Installation of the Bleed-Air Precooler-Exchanger Cold-Inlet
AMM 36-11-49-000-829	Removal of the Sense Line between the Bleed-Air Precooler Exchanger (Downstream) and the Fan Air-Valve Actuator
AMM 36-11-49-400-829	Installation of the Sense Line between the Bleed-Air Precooler Exchanger (Downstream) and the Fan Air-Valve Actuator
AMM 36-11-54-000-802	Removal of the Fan Air-Valve Actuator
AMM 36-11-54-400-802	Installation of the Fan Air-Valve Actuator
AMM 36-11-54-720-804	Functional Test of the Opening of the Fan Air Valve with the Bleed Test Set P/N 98D36109001000
AMM 36-22-00-790-802	Leak Check on all the Bleed Air Ducts and Packs Components

3. Fault Confirmation
Subtask 36-11-00-710-430-A ** ON A/C NOT FOR ALL

A. Test
(1) Do the BITE test of the EBAS AMM 36-11-00-740-802.
(2) Make sure that the ECAM warning AIR ENG 1 BLEED FAULT is shown on the upper ECAM DU.

4. Fault Isolation
Subtask 36-11-00-810-296-A ** ON A/C NOT FOR ALL

A. If the fault symptom is defined by the maintenance message:
PRECOOLER (7150HM1)/FAV AIR-V (9HA1)
(1) Do a functional test of the Fan Air Valve AMM 36-11-54-720-804
(2) If the test confirms the fault:
(a) Replace the VALVE-FAN AIR, ENG1 [9HA1] AMM 36-11-54-000-802 AMM 36-11-54-400-802
(3) Do the test given in Para. 3.

Subtask 36-11-00-810-297-A ** ON A/C NOT FOR ALL

B. If the fault continues:
(1) Replace the EXCHANGER-BLEED AIR PRECOOL [7150HM1] AMM 36-11-44-000-802 and AMM 36-11-44-400-802.
(2) Do the test given in Para. 3.

Subtask 36-11-00-810-505-A ** ON A/C NOT FOR ALL

C. If the fault continues:
(1) Replace the sense line between the precooler and the FAV AMM 36-11-49-000-829 AMM 36-11-49-400-829.
(2) Do a leak check of the sense line and ducts AMM 36-22-00-790-802.

Subtask 36-11-00-810-671-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 04:33:52 UTC