Overheat Electrical Test

TASK 36-11-00-740-810-A
Overheat Electrical 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 36-11-00-861-166-A ** ON A/C NOT FOR ALL

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

Subtask 36-11-00-865-164-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 36-11-00-860-163-A ** ON A/C NOT FOR ALL

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 in the AUTO position.
Make sure that the APU BLEED pushbutton switch is released (the ON legend is off).

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

4. Procedure
Subtask 36-11-00-740-060-A ** ON A/C NOT FOR ALL

A. Overheat Electrical Test
(1) If an error message shows during this procedure, record the message:
(a) Do the related troubleshooting procedure.
(2) Obey the instructions shown on the terminal during the test:

ACTION	RESULT
1.On the MCDU: Push the line key adjacent to the applicable BMC 1(2) indication.	The applicable BMC 1(2) comes into view.
2.On the MCDU: Push the line key adjacent to the TEST indication.	The BMC 1(2)/TEST comes into view.
3.On the MCDU: Push the line key adjacent to the OVERHEAT ELECTRICAL TEST indication.	The BMC 1(2)/OVERHEAT ELEC TEST IN PROGRESS 10S page comes into view. The TEST RESULT page comes into view with the status (short, open, operative) of each loop. NOTE: On the TEST RESULT page, when you push the line key in front of each loop, one more page is available for each loop. This new page gives the data related to the Centre Wire Resistance (CWR) and the Secure Communication Interface (SCI) values of each loop. It is not necessary to look at these pages for the BMC overheat electrical-test. Only the condition (short, open or operative) of each loop can be identified by this test.
4.On the MCDU: Push the line key adjacent to the RETURN indication until the MAINTENANCE MENU page comes into view.

5. Close-up
Subtask 36-11-00-860-164-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).

Subtask 36-11-00-862-147-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 01:07:31 UTC