BITE Check of Landing-Gear Control Interface-Unit (LGCIU) With Use of MCDU to Ensure that Continuous BITE is Operative

TASK 32-69-00-740-001-A
BITE Check of Landing-Gear Control Interface-Unit (LGCIU) With Use of MCDU to Ensure that Continuous BITE is Operative

WARNING: PUT THE SAFETY DEVICES AND THE WARNING NOTICES IN POSITION BEFORE YOU START A TASK ON OR NEAR:

THE FLIGHT CONTROLS
THE FLIGHT CONTROL SURFACES
THE LANDING GEAR AND THE RELATED DOORS
COMPONENTS THAT MOVE.

MOVEMENT OF COMPONENTS CAN KILL OR CAUSE INJURY TO PERSONS AND/OR CAN CAUSE DAMAGE TO THE EQUIPMENT.

WARNING: MAKE SURE THAT ALL THE CIRCUITS IN MAINTENANCE ARE ISOLATED BEFORE YOU SUPPLY ELECTRICAL POWER TO THE AIRCRAFT. UNWANTED ELECTRICAL POWER CAN BE DANGEROUS.

ZONE: 210

1. Reason for the Job
Refer to the MPD TASK: 323100-01
BITE CHECK OF LANDING GEAR CONTROL INTERFACE UNIT (LGCIU) USING MCDU (TO ENSURE THAT CONTINUOUS BITE IS OPERATIVE)
2. Job Set-up Information
A. Fixtures, Tools, Test and Support Equipment

REFERENCE	QTY	DESIGNATION
No specific	AR	SAFETY BARRIER(S)
No specific	AR	WARNING NOTICE(S)

B. Work Zones and Access Panels

ZONE/ACCESS	ZONE DESCRIPTION
210	CKPT,FWD COMPT BHD TO FLT COMPT BULKHEAD

C. 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 31-32-00-860-009-A	Procedure to Get Access to the SYSTEM REPORT/TEST/L/G Page
TASK 32-00-00-481-001-A	Installation of the Safety Devices on the Landing Gears

3. Job Set-up
Subtask 32-69-00-941-052-A

A. Safety Precautions
(1) As necessary, use the applicable SAFETY BARRIERS, specified by the operator's instructions and your local regulations.
(2) Make sure that the ground safety locks are on the landing gear (Ref. AMM TASK 32-00-00-481-001).
(3) On panel 400VU:

Make sure the landing-gear control lever is in the DOWN position
Put a WARNING NOTICE(S) in position to tell persons not to operate the landing gear controls.

Subtask 32-69-00-865-055-A

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

PANEL	DESIGNATION	FIN	LOCATION
** ON A/C ALL
49VU	L/G/LGCIU/SYS1/NORM	1GA	C09
** ON A/C NOT FOR ALL
121VU	LGCIU/BAT SPLY/SYS2	59GA	R33
121VU	LGCIU/BAT SPLY/SYS1	58GA	R32
** ON A/C ALL
121VU	HYDRAULIC/LGCIU/SYS2	2GA	Q35
121VU	HYDRAULIC/LGCIU/SYS1/GRND SPLY	52GA	Q34
** ON A/C NOT FOR ALL
121VU	LGCIU/BAT SPLY/SYS2	59GA	R32
121VU	LGCIU/BAT SPLY/SYS1	58GA	R31

Subtask 32-69-00-861-050-A

C. Energize the Electrical Circuits
(1) Energize the aircraft electrical circuits (Ref. AMM TASK 24-41-00-861-002).

4. Procedure
Subtask 32-69-00-740-050-A

A. BITE Check of the Landing-Gear Control Interface-Unit (LGCIU) With Use of MCDU to Ensure that Continuous BITE is Operative

NOTE: During the test, indications other than those on the MCDU will occur. You can ignore these other indications.

(1) Do this test:

ACTION	RESULT
1.On the Multifunction Central Display Unit (MCDU), get access to the L/G page (Ref. AMM TASK 31-32-00-860-009).	the MCDU shows the L/G menu.
(a) Push the LGCIU 1 P/BSW.	the MCDU shows the LGCIU 1 menu.
(b) Push the TEST P/BSW.	the MCDU shows the LGCIU 1 TEST menu the LGCIU 1 TEST menu shows 'test wait (10 secs)' when the tests are completed, the LGCIU 1 TEST menu shows 'test OK'.
2.Push the RETURN P/BSW until you get the L/G menu.	the MCDU shows the L/G menu.
(a) Push the LGCIU 2 P/BSW.	the MCDU shows the LGCIU 2 menu.
(b) Push the TEST P/BSW.	the MCDU shows the LGCIU 2 TEST menu the LGCIU 2 TEST menu shows 'test wait (10 secs)' when the tests are completed, the LGCIU 2 TEST menu shows 'test OK'.
3.Push the line key < RETURN frequently until the CFDS menu page is shown.

5. Close-up
Subtask 32-69-00-862-050-A

A. De-energize the Electrical Circuits
(1) De-energize the aircraft electrical circuits (Ref. AMM TASK 24-41-00-862-002).

Subtask 32-69-00-942-052-A

B. Removal of Equipment
(1) Make sure that the work area is clean and clear of tools and other items.
(2) Remove the SAFETY BARRIER(S).
(3) Remove the WARNING NOTICE(S).
(4) Remove the ground support and maintenance equipment, the special and standard tools and all other items.

[Rev.10 from 2021] 2026.04.01 00:52:09 UTC