Check for Erroneous Signal Positions to the Zones Controller from the Bleed and Wing/Nacelle Anti-Ice Valves with Engines, APU and Packs Operating [IAE]

TASK 73-22-00-710-043-A
Check for Erroneous Signal Positions to the Zones Controller from the Bleed and Wing/Nacelle Anti-Ice Valves with Engines, APU and Packs Operating

1. Reason for the Job
Refer to the MPD TASK: 732500-I1
TBD
2. Job Set-up Information
A. Referenced Information

REFERENCE	DESIGNATION
TASK 71-00-00-710-018-A	Discontinued Start, Restart and Shutdown Procedures
TASK 71-00-00-710-043-A	Normal Engine Automatic-Start Procedure
TASK 71-00-00-710-047-A	Normal Engine Manual-Start Procedure
Parameter Label Call-Up Menus

3. Job Set-up
Subtask 73-22-00-860-051-A ** ON A/C NOT FOR ALL

A. Aircraft Maintenance Configuration
(1) Start the APU
(2) Start both engines (Ref. AMM TASK 71-00-00-710-043) or (Ref. AMM TASK 71-00-00-710-047).
(3) On the AIR COND panel 30VU, make sure that the PACK 1/2 pusbutton switches are pushed (the OFF legend is off).
(4) On the MCDU get the AIDS menu.

4. Procedure
Subtask 73-22-00-710-051-A ** ON A/C NOT FOR ALL

A. Check of the engine bleed valve, nacelle anti-ice valve and wing anti-ice valve position acquired by zone controller.
(1) Check the engine bleed valve and nacelle anti-ice valve signals.
(a) On the MCDU menu select label call up PARAM LAB key.

Parameter Label Call-Up Menus ** ON A/C NOT FOR ALL

(b) On the MCDU key board set 07C/1/272/01 for engine 1 (07C/2/272/10 for engine 2) and set ENTER (see ATA chapter 31-36-00 for detailed description of AIDS).
(c) On the overhead control and indicating panel 25VU, make sure that wing anti-ice and nacelle anti-ice valves are off (the ON legend is off).
(d) On the AIR COND panel 30VU, make sure that the engine bleed valves are off (the OFF legend is on).
(e) On the AIR COND panel 30VU, select the APU bleed to on (the ON legend is on).
(f) Wait until the position of all the valves is stable on the lower ECAM display unit, on the BLEED page.
(g) Print the page of the MCDU.
(h) Check on the printed page that bits 22 to 27 are all se to 0 (bits must be read from the right to the left of the displayed word). This ensures that :

There is no bleed valve position erroneous signal acquired by the zone controller
There is no nacelle anti-ice valve position erroneous signal acquired by the zone controller.

(2) Check the wing anti-ice valve signal.
(a) On the AIR COND panel 30VU, select the engine bleed valves to on (the OFF legend is off).
(b) On the AIR COND panel 30VU, select the APU bleed to off (the ON legend is off).
(c) Make sure there is no engine bleed fault.
(d) Print the page of the MCDU.
(e) Check on the printed page that bit 25 is set to 1 and bits 22, 23, 24, 26, 27 are all set to 0 (bits must be read from the right to the left of the displayed word). This ensures that there is no wing anti-ice valve position erroneous signal acquired by the zone controller.
(3) On the AIR COND panel 30VU, select the engine bleed valves to off (the OFF legend is on).

5. Close-up
Subtask 73-22-00-860-052-A ** ON A/C NOT FOR ALL

A. Put the aircraft back to its initial configuration.
(1) Push the line key adjacent to the RETURN indication until the MCDU menu comes into view.
(2) Stop the MCDU.
(3) Shutdown the engines (Ref. AMM TASK 71-00-00-710-018).
(4) Shutdown the APU.

[Rev.10 from 2021] 2026.04.01 03:00:42 UTC