Drift Test of the Pressure Sensor

TASK 36-11-00-740-805-A
Drift Test of the Pressure Sensor

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 24-41-00-861-002-A-01	Energize the Aircraft Electrical Circuits from the APU
TASK 24-41-00-861-002-A-02	Energize the Aircraft Electrical Circuits from Engine 1(2)
TASK 24-41-00-862-002-A	De-energize the Aircraft Electrical Circuits Supplied from the External Power
TASK 24-41-00-862-002-A-01	De-energize the Aircraft Electrical Circuits Supplied from the APU
TASK 24-41-00-862-002-A-02	De-energize the Aircraft Electrical Circuits Supplied from the Engine 1(2)
TASK 31-32-00-860-011-A	Procedure to Get Access to the SYSTEM REPORT/TEST/PNEU Page
TASK 36-12-00-860-802-A	Pressurization of the Bleed System with the APU
TASK 36-12-00-860-803-A	Pressurization of the Bleed System through the HP Ground Connector

3. Job Set-up
Subtask 36-11-00-861-155-A ** ON A/C NOT FOR ALL

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

Subtask 36-11-00-865-149-A ** ON A/C NOT FOR ALL

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

PANEL	DESIGNATION	FIN	LOCATION
** ON A/C NOT FOR 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 36-11-00-860-123-A ** ON A/C NOT FOR ALL

C. Aircraft Maintenance Configuration
(1) On the AIR COND panel:

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

(2) Make sure that the bleed air ducts are pressurized:

Pressurize with APU (Ref. AMM TASK 36-12-00-860-802).
or
Pressurize with HPGC (Ref. AMM TASK 36-12-00-860-803).

(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 36-11-00-740-053-A ** ON A/C NOT FOR ALL

A. BITE Test of the EBAS Application
(1) During this procedure, if an error message is shown, record this message.
(a) Do the related trouble shooting procedure.

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 (1HA) indication.	The applicable BMC (1HA) comes into view.
2.On the MCDU: Push the line key adjacent to the TEST indication.	The BMC (1HA)/TEST comes into view.
3.On the MCDU: Push the line key adjacent to the PRESSURE SENSOR DRIFT TEST indication.	The BMC (1HA)/PRESSURE SENSOR DRIFT TEST/CHECK INITIAL CONDITIONS pages comes into view. Initial conditions: * BLEED AIR PRESSURE AVAILABLE. * BLEED PRESSURE SENSOR AVAILABLE. * BLEED SYSTEM NOT IN SINGLE BLEED CONFIG.
4.On the MCDU: Push the line key adjacent to the CONTINUE indication.	The BMC (1HA)/PRESSURE SENSOR DRIFT TEST/CHECK INITIAL CONDITIONS page comes into view. Initial conditions: * ENGINES OFF. * ENGINES NOT IN START SEQUENCE.
5.On the MCDU: Push the line key adjacent to the CONTINUE indication.	The BMC (1HA)/PRESSURE SENSOR DRIFT TEST IN PROGRESS page comes into view. TEST IN PROGRESS for several seconds. TEST RESULT page comes into view with PRESSURE SENSOR DRIFT TEST results: * PRESSURE SENSOR DRIFT TEST OK. or * PRESSURE DRIFT TEST with failure message and CLASS come into the view.
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 36-11-00-860-127-A ** ON A/C NOT FOR ALL

A. Aircraft Maintenance Configuration
(1) Put the aircraft back to its initial configuration.
(2) On the MCDU:
(a) Fully decrease the brightness of the MCDU screen (display off).
(3) Depressurize the air ducts:
(a) If you used the APU (Ref. AMM TASK 36-12-00-860-802).
(b) If you used the HPGC (Ref. AMM TASK 36-12-00-860-803).

Subtask 36-11-00-862-136-A ** ON A/C NOT FOR ALL

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

[Rev.10 from 2021] 2026.04.01 01:07:29 UTC