BITE Check of LGCIU A320
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.
1. Reason for the Job
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 |
| Ref. 24-41-00-861-002-A | Energize the Aircraft Electrical Circuits from the External Power |
| Ref. 24-41-00-861-002-A01 | Energize the Aircraft Electrical Circuits from the APU |
| Ref. 24-41-00-861-002-A02 | Energize the Aircraft Electrical Circuits from Engine 1(2) |
| Ref. 24-41-00-862-002-A | De-energize the Aircraft Electrical Circuits Supplied from the External Power |
| Ref. 24-41-00-862-002-A01 | De-energize the Aircraft Electrical Circuits Supplied from the APU |
| Ref. 24-41-00-862-002-A02 | De-energize the Aircraft Electrical Circuits Supplied from the Engine 1(2) |
| Ref. 31-32-00-860-009-A | Procedure to Get Access to the SYSTEM REPORT/TEST/L/G Page |
| Ref. 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 |
| 49VU | L/G/LGCIU/SYS1/NORM | 1GA | C09 |
| 121VU | HYDRAULIC/LGCIU/SYS2 | 2GA | Q35 |
| 121VU | HYDRAULIC/LGCIU/SYS1/GRND SPLY | 52GA | Q34 |
| 121VU | LGCIU/BAT SPLY/SYS2 | 59GA | R33 |
| 121VU | LGCIU/BAT SPLY/SYS1 | 58GA | R32 |
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.
