Low Bleed Temperature of Engine 1 in Descent

TASK 36-11-00-810-A43-A
Low Bleed Temperature of Engine 1 in Descent

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)
ASM 361101
AMM 36-11-17-000-001	Removal of the Heat-Exchanger Outlet-Temperature Sensor
AMM 36-11-17-400-001	Installation of the Heat-Exchanger Outlet-Temperature Sensor
AMM 36-11-51-000-802	Removal of the HP Bleed Valve
AMM 36-11-51-400-802	Installation of the HP Bleed Valve

3. Fault Confirmation
Subtask 36-11-00-710-513-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 36-11-00-810-500-A ** ON A/C NOT FOR ALL

A. If the BITE test gives no maintenance message:

(1) If the BITE test gives the class 3 maintenance message:
TEMP SENSOR 6HA1

Replace the SENSOR-EXCHANGER OUT TEMP, ENG 1 [6HA1] AMM 36-11-17-000-001 and AMM 36-11-17-400-001.

Subtask 36-11-00-810-530-A ** ON A/C NOT FOR ALL

B. If the fault continues:
(1) Do a check and repair the wiring ASM 361101 between:

Engine 1 Exchanger Output Temperature Sensor (6HA1) pin A/1 and pin A/2 and BMC 1 (1HA1) pin AB/7D and pin AB/7E.
Engine 1 Exchanger Output Temperature Sensor (6HA1) pin B/1 and pin B/2 and BMC 1 (1HA1) pin AA/2C and pin AA/2B.

(2) If the BITE test gives the class 3 maintenance message:
HP BLEED-V 4000HA1

Subtask 36-11-00-710-514-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 04:33:58 UTC