Flap WTB Solenoid - WTB Test Procedure

TASK 27-51-00-040-004-A
Flap WTB Solenoid - WTB Test Procedure

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.

ZONE: 128
FIN: 21CV
Task Summary

Access	Test	Specific Tools	Mhr	E/T	Nb Men
NO	NO	NO	1.0	1.0	1

1. Reason for the Job
MMEL 27-51-02A
FLAP WING TIP BRAKES SOLENOID
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. Work Zones and Access Panels

ZONE/ACCESS	ZONE DESCRIPTION
128	REAR AVIONIC COMPARTMENT

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 27-51-00-710-001-A	Operational Test of the Wing Tip Brake and the Pressure Off Brake

3. Job Set-up
Subtask 27-51-00-941-065-A

A. Safety Precautions
(1) Put the SAFETY BARRIER(S) in position.
(2) Put a WARNING NOTICE(S) in the cockpit to tell persons not to operate the flap system.

Subtask 27-51-00-860-076-A

B. Aircraft Maintenance Configuration
(1) Energize the aircraft electrical circuits (Ref. AMM TASK 24-41-00-861-002).
(2) In the procedure that follows it is necessary to do the WTB/POB test with SFCC 1 (Ref. AMM TASK 27-51-00-710-001).
Prepare to pressurize the hydraulic systems.

Subtask 27-51-00-865-090-A

C. 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
121VU	FLIGHT CONTROLS/FLP/CTL AND/MONG/SYS2	8CV	Q21
121VU	FLIGHT CONTROLS/SLT/CTL/SYS2	7CV	R21

4. Procedure
Subtask 27-51-00-040-054-A

A. Flap WTB Solenoid - WTB Test Procedure
(1) Do the WTB/POB test with SFCC No. 1 (flap system) (Ref. AMM TASK 27-51-00-710-001).
(2) Make sure that the WTB/POB test was successful and that the MCDU shows:
SFCC 1
DATE: XXX XX__ UTC: XXXX
PERFORMED
NO FAULTS
RESULT NOT STORED

NOTE: The aircraft can only dispatched if the WTB/POB test was successful.

(3) Put the aircraft back to its initial configuration:
(a) On the MCDU, push the key adjacent to < RETURN until the CFDS MENU page is shown.
(b) On the MCDU, push the MCDU MENU key and make sure that the MCDU MAIN MENU is shown.

5. Close-up
Subtask 27-51-00-865-102-A

A. 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
121VU	FLIGHT CONTROLS/FLP/CTL AND/MONG/SYS2	8CV	Q21
121VU	FLIGHT CONTROLS/SLT/CTL/SYS2	7CV	R21

Subtask 27-51-00-942-060-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 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] 2026.03.31 23:52:14 UTC