Reset of the Wing Tip Brake (WTB) of the Slat System on the Ground

TASK 27-80-00-869-004-A
Reset of the Wing Tip Brake (WTB) of the Slat System on the Ground

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.

1. Reason for the Job
Self explanatory
2. Job Set-up Information
A. Fixtures, Tools, Test and Support Equipment

REFERENCE	QTY	DESIGNATION
No specific	AR	SAFETY BARRIER(S)
No specific	AR	SAFETY CLIP - CIRCUIT BREAKER
No specific	AR	WARNING NOTICE(S)

B. 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 27-80-00-866-006-A	Reset of the Torque Limiters of the Slat System on the Ground
TASK 27-84-00-710-001-A	Operational Test of the Slat System
TASK 29-10-00-863-001-A	Pressurize the Green Hydraulic System with a Hydraulic Ground Power-Cart
TASK 29-10-00-863-002-A	Pressurize the Yellow Hydraulic System with a Hydraulic Ground Power-Cart
TASK 29-10-00-863-003-A	Pressurize the Blue Hydraulic System with a Hydraulic Ground Power-Cart
TASK 29-10-00-863-003-A-01	Pressurize the Blue Hydraulic System with the Blue Electric Pump
TASK 29-10-00-864-001-A	Depressurize the Green Hydraulic System
TASK 29-10-00-864-002-A	Depressurize the Yellow Hydraulic System
TASK 29-10-00-864-003-A	Depressurize the Blue Hydraulic System
TASK 29-23-00-863-001-A	Pressurize the Green Hydraulic System from the Yellow Hydraulic System through the PTU with the Electric Pump
TASK 29-23-00-864-001-A	Depressurize the Green and Yellow Hydraulic Systems after Operation of the PTU
TASK 29-24-00-863-001-A	Pressurize the Yellow Hydraulic System with the Electric Pump
TASK 31-32-00-860-006-A	Procedure to Get Access to the SYSTEM REPORT/TEST F/CTL Page

3. Job Set-up
Subtask 27-80-00-941-061-A

A. Safety Precautions
(1) Put the SAFETY BARRIER(S) in position.
(2) Put a WARNING NOTICE(S) in position to tell persons that the slat system is in operation.
(3) Open the circuit breakers that follow in step B. BEFORE you energize the aircraft electrical circuits.

NOTE: It is important to do this to make sure that the FACs cannot go into the 'Return to Low speed' mode during SLAT WTB Reset procedure.

Subtask 27-80-00-865-073-A

B. Open, safety and tag this(these) circuit breaker(s):

PANEL	DESIGNATION	FIN	LOCATION
** ON A/C NOT FOR ALL
49VU	AUTO FLT/FAC1/26VAC	14CC1	B03
** ON A/C NOT FOR ALL
49VU	AUTO FLT/FAC1/26VAC	14CC1	H09
** ON A/C ALL
121VU	AUTO FLT/FAC2/26VAC	14CC2	M18

Subtask 27-80-00-860-063-A

C. Aircraft Maintenance Configuration

WARNING: MAKE SURE THAT THE TRAVEL RANGES OF THE FLIGHT CONTROLS SURFACES ARE CLEAR. MOVEMENT OF FLIGHT CONTROLS CAN CAUSE INJURY TO PERSONS AND/OR DAMAGE TO EQUIPMENT.

(1) Energize the aircraft electrical circuits (Ref. AMM TASK 24-41-00-861-002).
(2) Make sure that the Green, the Yellow and the Blue hydraulic systems are depressurized (Ref. AMM TASK 29-10-00-864-001) (Ref. AMM TASK 29-10-00-864-002) (Ref. AMM TASK 29-10-00-864-003).
(3) Get access to the flight controls (F/CTL) page on the Multipurpose Control Display Unit (MCDU) (Ref. AMM TASK 31-32-00-860-006).

Subtask 27-80-00-865-068-A

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

PANEL	DESIGNATION	FIN	LOCATION
** ON A/C NOT FOR ALL
49VU	FLIGHT CONTROLS/FLP/CTL AND MONG/SYS1	6CV	B07
49VU	FLIGHT CONTROLS/SLT/CTL AND MONG/SYS1	5CV	B06
** ON A/C NOT FOR ALL
49VU	FLIGHT CONTROLS/FLP/CTL AND MONG/SYS1	6CV	B02
49VU	FLIGHT CONTROLS/SLT/CTL AND MONG/SYS1	5CV	B01
** ON A/C ALL
121VU	FLIGHT CONTROLS/WTB/FLP/SYS2	12CV	P20
121VU	FLIGHT CONTROLS/WTB/SLT/SYS2	11CV	P19
121VU	FLIGHT CONTROLS/FLP/CTL AND/MONG/SYS2	8CV	Q21
121VU	FLIGHT CONTROLS/SLT/CTL/SYS2	7CV	R21
122VU	FLIGHT CONTROLS/WTB/FLP/SYS1	10CV	S07
122VU	FLIGHT CONTROLS/WTB/SLT/SYS1	9CV	S06

4. Procedure
Subtask 27-80-00-869-060-A

A. Reset of the Wing Tip Brake (WTB) of the Slat System on the Ground

NOTE: Use any available MCDU to do the reset of the wing tip brake.

ACTION	RESULT
1.Open the C/B 7CV.	SFCC 2 is isolated.
2.On the MCDU: push the line key < SFCC 1.	On the MCDU: the MCDU shows the SFCC 1 menu.
3.On the MCDU: push the NEXT PAGE button.	On the MCDU: the MCDU shows the next page of the SFCC 1 menu.
4.On the MCDU: push the line key < SLT TEST/RESET.	On the MCDU: the MCDU shows the SFCC 1 SLAT TEST/RESET menu.
5.On the MCDU: push the line key WTB-RESET >.	On the MCDU: the MCDU shows the SFCC 1 SLAT WTB-RESET procedure.
6.On the MCDU: push the line key < START WTB RESET.	On the MCDU: the MCDU shows: SFCC 1 SLAT WTB-RESET PERFORMED.
7.Close the C/B 7CV.	SFCC 2 is energized.
8.Open the C/B 5CV.	SFCC 1 is isolated.
9.On the MCDU: push the line key < SFCC 2.	On the MCDU: the MCDU shows the SFCC 2 menu.
10.On the MCDU: push the NEXT PAGE button.	On the MCDU: the MCDU shows the next page of the SFCC 2 menu.
11.On the MCDU: push the line key < SLT TEST/RESET.	On the MCDU: the MCDU shows the SFCC 2 SLAT TEST/RESET menu.
12.On the MCDU: push the line key WTB-RESET >.	On the MCDU: the MCDU shows the SFCC 2 SLAT WTB-RESET procedure.
13.On the MCDU: push the line key < START WTB RESET.	On the MCDU: the MCDU shows: SFCC 2 SLAT WTB-RESET PERFORMED.
14.Close the C/B 5CV.
15.On the MCDU: push the line key < RETURN frequently until the CFDS MENU page is shown.
16.Pressurize the Green, Yellow and Blue hydraulic systems (Ref. AMM TASK 29-10-00-863-001) or (Ref. AMM TASK 29-23-00-863-001), (Ref. AMM TASK 29-10-00-863-002) or (Ref. AMM TASK 29-24-00-863-001) and (Ref. AMM TASK 29-10-00-863-003).
17.Move the slat and flap control lever in the slat extension and retraction direction.
18.Check all the slat system torque limiters and reset as necessary (Ref. AMM TASK 27-80-00-866-006).

Subtask 27-80-00-710-052-A

B. Operational Test
(1) Do the Operational Test of the Slat System (Ref. AMM TASK 27-84-00-710-001).

5. Close-up
Subtask 27-80-00-860-064-A

A. Aircraft Configuration
(1) Depressurize the aircraft hydraulic systems
(Ref. AMM TASK 29-10-00-864-001) or (Ref. AMM TASK 29-23-00-864-001), (Ref. AMM TASK 29-10-00-864-002), (Ref. AMM TASK 29-10-00-864-003).
(2) De-energize the aircraft electrical circuits (Ref. AMM TASK 24-41-00-862-002).

Subtask 27-80-00-865-074-A

B. Remove the safety clip(s) and the tag(s) and close this(these) circuit breaker(s):

PANEL	DESIGNATION	FIN	LOCATION
** ON A/C NOT FOR ALL
49VU	AUTO FLT/FAC1/26VAC	14CC1	B03
** ON A/C NOT FOR ALL
49VU	AUTO FLT/FAC1/26VAC	14CC1	H09
** ON A/C ALL
121VU	AUTO FLT/FAC2/26VAC	14CC2	M18

Subtask 27-80-00-942-060-A

C. Removal of Equipment
(1) Make sure that the work area is clean and clear of tools and other items.
(2) Remove the safety barriers.
(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 06:56:30 UTC