Operational Test of the Trimmable Horizontal Stabilizer Actuator with both (Green and Yellow) and Individual Hydraulic Systems

TASK 27-44-00-710-003-A
Operational Test of the Trimmable Horizontal Stabilizer Actuator with both (Green and Yellow) and Individual Hydraulic Systems

ZONE: 210

1. Reason for the Job
Self explanatory
2. Job Set-up Information
A. Work Zones and Access Panels

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

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 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 31-60-00-860-001-A	EIS Start Procedure
TASK 31-60-00-860-002-A	EIS Stop Procedure

3. Job Set-up
Subtask 27-44-00-865-052-A

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

PANEL	DESIGNATION	FIN	LOCATION
** ON A/C NOT FOR ALL
49VU	FLIGHT CONTROLS/ELAC1/NORM/SPLY	15CE1	B11
49VU	FLIGHT CONTROLS/THS/ACTR/MOT2	19CE2	B09
49VU	FLIGHT CONTROLS/SEC1/NORM/SPLY	21CE1	B08
** ON A/C NOT FOR ALL
49VU	FLIGHT CONTROLS/ELAC1/NORM/SPLY	15CE1	B06
49VU	FLIGHT CONTROLS/THS/ACTR/MOT2	19CE2	B04
49VU	FLIGHT CONTROLS/SEC1/NORM/SPLY	21CE1	B03
** ON A/C ALL
105VU	FLIGHT CONTROLS/ELAC2/STBY SPLY	16CE2	A02
105VU	FLT CTL/ELAC1/STBY SPLY	16CE1	A01
121VU	FLIGHT CONTROLS/SEC3/SPLY	21CE3	Q19
121VU	FLIGHT CONTROLS/SEC2/SPLY	21CE2	Q18
121VU	FLIGHT CONTROLS/THS ACTR/MOT3	19CE3	Q17
121VU	FLIGHT CONTROLS/THS ACTR/MOT1	19CE1	Q16
121VU	FLIGHT CONTROLS/ELAC2/NORM/SPLY	15CE2	R20

Subtask 27-44-00-860-055-B

B. Aircraft Maintenance Configuration
(1) Energize the aircraft electrical circuits (Ref. AMM TASK 24-41-00-861-002).
(2) Pressurize the Yellow and the Green hydraulic systems (Ref. AMM TASK 29-23-00-863-001).
(3) Do the EIS start procedure (upper ECAM DU and lower ECAM DU only)
(Ref. AMM TASK 31-60-00-860-001).
(4) On the center pedestal on the ECAM control panel, push the F/CTL pushbutton switch.
(5) Make sure that on the lower display unit (DU) of the ECAM, the F/CTL page comes on.

4. Procedure
Subtask 27-44-00-710-056-A

A. Do this test:

ACTION	RESULT
1.On the center pedestal: turn the pitch-trim control wheel to the nose DN stop position and then to the nose UP stop position.	The THS moves to the nose fully down and then to the nose fully up position. On the F/CTL page of the lower ECAM DU: the PITCH TRIM indication shows the movement of the THS in both directions.
2.On the maintenance panel 50VU: lift the guard and release the HYD/LEAK MEASUREMENT VALVES/G and HYD/LEAK MEASUREMENT VALVES/Y pushbutton switches.	On the panel 50VU: the OFF legend on the G and Y pushbutton switches come on.
3.On the center pedestal: turn the pitch-trim control wheel in one direction.	The THS does not move. On the F/CTL page of the lower ECAM DU: the PITCH TRIM indication shows no movement.
4.On the maintenance panel 50VU: lift the guard and push the HYD/LEAK MEASUREMENT VALVES/Y pushbutton switch.	On the panel 50VU: the OFF legend on the Y pushbutton switch goes off.
5.On the center pedestal: turn the pitch-trim control wheel to the nose DN stop position and then to the nose UP stop position.	The THS moves to the nose fully down and then to the nose fully up position. On the F/CTL page of the lower ECAM DU: the PITCH TRIM indication shows the movement of the THS in both directions.
6.On the panel 50VU: lift the guard and release the HYD/LEAK MEASUREMENT VALVES/Y and push the HYD/LEAK MEASUREMENT VALVES/G pushbutton switches.	On the panel 50VU: the OFF legend on the Y pushbutton switch comes on. the OFF legend on the G pushbutton switch goes off.
7.On the center pedestal: turn the pitch-trim control wheel to the nose DN stop and then to the O position.	The THS moves to the fully nose down position and stop at the O position. On the lower ECAM DU, on the F/CTL page: the PITCH TRIM indication shows the movement of the THS.
8.On the panel 50VU: lift the guard and push the HYD/LEAK MEASUREMENT VALVES/Y pushbutton switch.	On the panel 50VU: the OFF legend on the Y pushbutton switch goes off.

5. Close-up
Subtask 27-44-00-860-056-A

A. Put the aircraft back to the serviceable condition.
(1) Depressurize the Green and Yellow hydraulic systems.
(Ref. AMM TASK 29-23-00-864-001).
(2) Do the EIS stop procedure
(Ref. AMM TASK 31-60-00-860-002).
(3) De-energize the aircraft electrical circuits
(Ref. AMM TASK 24-41-00-862-002).

[Rev.10 from 2021] 2026.04.01 06:52:45 UTC