Low Bleed Air from Engine 2

TASK 21-63-00-810-834-A
Low Bleed Air from Engine 2

1. Possible Causes

wiring
bleed air ducts
bleed air duct-connections

2. Job Set-up Information
A. Referenced Information

REFERENCE	DESIGNATION
ASM 216102
ASM 216302

3. Fault Confirmation
Subtask 21-63-00-710-115-A

A. Not applicable, you cannot confirm this fault on the ground.

4. Fault Isolation
Subtask 21-63-00-810-119-A

A. Make sure that no other failure messages related to chapter 30 and 36 occur. If other failure messages occur, do the trouble shooting of this failures before you continue with the subsequent steps.

Subtask 21-63-00-810-120-A ** ON A/C NOT FOR ALL

B. If the operational test of the cockpit and cabin temperature control system shows the maintenance message NO BLEED AIR ENG 2 or WAI: NO BLEED AIR ENG 2:
(1) Do a check and repair the wiring ASM 216302:

from the VC (8HK)AB/H2 to the BMC 2 (1HA2)AA/13B.

(2) If the fault continues:

do a leak check of the bleed air ducts and the bleed air duct-connections from the engine 2 to the air conditioning pack 2 (11HM),
replace or tighten as necessary.

Subtask 21-63-00-810-120-B ** ON A/C NOT FOR ALL

B. If the operational test of the cockpit and cabin temperature control system shows the maintenance message WAI: NO BLEED AIR ENGINE 2:
(1) Do a check and repair the wiring ASM 216102:

from the ACSC (47HH) to the BMC 2 (1HA2).

(2) If the fault continues:

do a leak check of the bleed air ducts and the bleed air duct-connections from the engine 2 to the air conditioning pack 2 (11HM),
replace or tighten as necessary.

Subtask 21-63-00-710-116-A

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

[Rev.8 from Aug 2018] 2026.04.04 04:25:03 UTC