BITE Test of the Engine Bleed Air System (EBAS) (System Test)

TASK 36-11-00-740-804-A
BITE Test of the Engine Bleed Air System (EBAS) (System Test)

1. Reason for the Job
Self explanatory
2. Job Set-up Information
A. Referenced Information

REFERENCE	DESIGNATION
TASK 24-41-00-861-002-A	Energize the Aircraft Electrical Circuits from the External Power
TASK 24-41-00-862-002-A	De-energize the Aircraft Electrical Circuits Supplied from the External Power
TASK 31-32-00-860-011-A	Procedure to Get Access to the SYSTEM REPORT/TEST/PNEU Page

3. Job Set-up
Subtask 36-11-00-861-145-A

A. Energize the aircraft electrical circuits
(Ref. AMM TASK 24-41-00-861-002).

Subtask 36-11-00-865-132-A

B. Make sure that this(these) circuit breaker(s) is(are) closed:

PANEL	DESIGNATION	FIN	LOCATION
** ON A/C ALL
49VU	AIR BLEED/APU BLEED VLV CTL/BMC1 OVRD	11HV	D14
49VU	AIR BLEED/X FEED/VALVE/BAT	2HV	D13
49VU	AIR BLEED/ENG 2/MONG	3HA2	D12
49VU	AIR BLEED/ENG 1/CTL	2HA1	D11
122VU	AIR BLEED/ENG 1/MONG	3HA1	Z23
122VU	AIR BLEED/ENG 2/CTL	2HA2	Z22
122VU	AIR BLEED/X FEED VALVE/NORM	1HV	Z20
122VU	AIR BLEED/APU BLEED VLV CTL/BMC2 OVRD	12HV	Z19

Subtask 36-11-00-860-113-A

C. Aircraft Maintenance Configuration
(1) Make sure that the APU is not in operation.
(2) On AIR COND panel 30VU:

Make sure that ENG 1(2) bleed pushbutton switches are pushed (the OFF legends are off).
Make sure that the crossbleed selector switch is set to AUTO.
Make sure that APU BLEED pushbutton switch is released (the ON legend is off).

(3) Adjust the brightness of the MCDU screen.
(4) On one MCDU, get the SYSTEM REPORT/TEST PNEU menu page (Ref. AMM TASK 31-32-00-860-011).

4. Procedure
Subtask 36-11-00-740-052-A

A. BITE Test of the Engine Bleed Air System(EBAS)
(1) During this procedure, if an error message is shown, record the message. Then do the related troubleshooting procedure.
(2) Do this test:

NOTE: During the test, obey the instruction shown on the terminal.

ACTION	RESULT
1.On the MCDU: Push the line key adjacent to the applicable BMC 1(2) indication.	The applicable BMC 1(2) page comes into view.
2.On the MCDU: Push the line key adjacent to the TEST indication.	The BMC 1(2)/TEST page comes into view.
3.On the MCDU: Push the line key adjacent to the ELECTRICAL TEST indication.	The BMC 1(2)/ELECTRICAL TEST/CHECK INITIAL CONDITIONS page comes into view. Check the initial conditions: * BLEED PRESSURE NOT AVAILABLE. * BLEED SYSTEM NOT IN SINGLE BLEED CONFIG. * ENGINES OFF.
4.On the MCDU: Push the line key adjacent to the CONTINUE indication.	The BMC 1(2)/ELECTRICAL TEST/CHECK INITIAL CONDITIONS page comes into view. Check the initial conditions: * ENGINES NOT IN START SEQUENCE * APU NOT BLEEDING * HPGC NOT BLEEDING.
5.On the MCDU: Push the line key adjacent to the CONTINUE indication.	The BMC 1(2)/LRU'S PNEU FUNCTIONS NOT CHECKED DURING TEST/ELECTRICAL TESTING PROGRESS page comes into view. The indication ELECTRICAL TEST IN PROGRESS is shown for some seconds. The TEST RESULT page comes into view with the ELECTRICAL TEST OK indication.
6.On the MCDU: Push the line key adjacent to the RETURN indication until the MAINTENANCE MENU page comes into view.

5. Close-up
Subtask 36-11-00-860-145-A

A. Aircraft Maintenance Configuration
(1) Put the aircraft back to its initial configuration.
(2) On the MCDU:
(a) Push the line key adjacent to the RETURN indication until the MAINTENANCE MENU 1/2 page comes into view.
(b) Fully decrease the brightness of the MCDU screen (display off).

Subtask 36-11-00-862-128-A

B. De-energize the aircraft electrical circuits
(Ref. AMM TASK 24-41-00-862-002).

[Rev.10 from 2021] 2026.04.01 01:07:40 UTC