Installation of the Solenoid Valve

TASK 27-26-51-400-003-A
Installation of the Solenoid Valve

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

WARNING: PRESSURIZE ONLY THE HYDRAULIC SYSTEM(S) THAT IS (ARE) NECESSARY FOR THE TASK. ISOLATE THE OTHER HYDRAULIC SYSTEM(S) BEFORE YOU SUPPLY HYDRAULIC POWER TO THE AIRCRAFT.

WARNING: BE CAREFUL WHEN YOU USE CONSUMABLE MATERIALS. OBEY THE MATERIAL MANUFACTURER'S INSTRUCTIONS AND YOUR LOCAL REGULATIONS.

ZONE: 325

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

REFERENCE	QTY	DESIGNATION
No specific	1	ACCESS PLATFORM 6M (20 FT) - ADJUSTABLE
No specific	1	CONTAINER - HYDRAULIC FLUID RESISTANT
No specific	1	WARNING NOTICE(S)
No specific	Torque wrench: range to between 0.22 and 0.18 m.daN (19.47 and 15.93 lbf.in )
98D27207549000	1	PIN-RIGGING

B. Consumable Materials

REFERENCE	DESIGNATION
(Material No.02ABA1)	Phosphate Ester Hydraulic Fluid-General Power - -
(Material No.06LCG9)	Non Hardening Jointing Putty-Medium Temp. Area - -
No specific	lockwire, corrosion-resistant steel, dia. 0.8 mm (0.032 in.)

C. Work Zones and Access Panels

ZONE/ACCESS	ZONE DESCRIPTION
325	VERTICAL STABILIZER TRAILING EDGE
325BL, 325BR

D. Expendable Parts

FIG.ITEM	DESIGNATION	IPC-CSN
4	PACKING	AIPC 27-26-51-01-100
5	PACKING	AIPC 27-26-51-01-110
6	PACKING	AIPC 27-26-51-01-120
9	PACKING	AIPC 27-26-51-01-130

E. Referenced Information

REFERENCE	DESIGNATION
TASK 22-63-00-710-001-A	Operational Test of the Yaw Damper Function
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 29-00-00-864-001-A	Put the Related Hydraulic System in the Depressurized Configuration before Maintenance Action
TASK 29-00-00-910-002-A	Safety Procedures of the Hydraulic System
TASK 29-14-00-614-001-A	Depressurization of the Hydraulic Reservoirs
TASK 29-14-00-614-002-A	Pressurization of the Hydraulic Reservoirs through the Ground Connector
TASK 29-14-00-614-002-A-01	Pressurization of the Hydraulic Reservoirs with the Auxiliary Power Unit (APU)
TASK 55-33-13-010-002-A	Opening/Removal of the Trailing Edge Access-Panels of the Vertical Stabilizer
TASK 55-33-13-410-002-A	Closing/Installation of the Trailing Edge Access-Panels of the Vertical Stabilizer
Servovalve and Solenoid Valve

3. Job Set-up
Subtask 27-26-51-860-056-B

A. Aircraft Maintenance Configuration

WARNING: OBEY THE HYDRAULIC SAFETY PROCEDURES.

(1) Obey the hydraulic safety procedures (Ref. AMM TASK 29-00-00-910-002).
(2) Make sure that the ACCESS PLATFORM 6M (20 FT) - ADJUSTABLE is in position at zone 325.
(3) Make sure that the access panel 325BL (for the solenoid valve on 3CC1) or 325BR (for the solenoid valve on 3CC2) is open (Ref. AMM TASK 55-33-13-010-002).
(4) Make sure that the rudder pedals are in the neutral position.
(5) Make sure that the RUD TRIM indicator on the center pedestal, on the panel 110VU shows 0.
(6) Make sure that the warning notices are in position in the cockpit to tell persons not to operate the flight controls.
(7) Make sure that the hydraulic systems are depressurized and put them in the maintenance configuration
(Ref. AMM TASK 29-00-00-864-001).
(8) Make sure that the reservoirs of the Green and Yellow hydraulic systems are depressurized (Ref. AMM TASK 29-14-00-614-001).
(9) Make sure that the aircraft electrical circuits are de-energized (Ref. AMM TASK 24-41-00-862-002).
(10) Make sure that the WARNING NOTICE(S) are in position to tell persons not to pressurize the Green, the Yellow and the Blue hydraulic systems:

in the cockpit on the hydraulic section 40VU of the overhead panel,
on the ground service panels of the Green, Yellow and Blue hydraulic systems.

(11) Make sure that the PIN - RIGGING 98D27207549000 PIN-RIGGING is in position in the yaw damper bellcrank.
(12) Make sure that the CONTAINER - HYDRAULIC FLUID RESISTANT is in position below the yaw damper to collect unwanted fluid.

Subtask 27-26-51-865-057-A

B. Make sure that this(these) circuit breaker(s) is(are) open, safetied and tagged:

PANEL	DESIGNATION	FIN	LOCATION
** ON A/C NOT FOR ALL
49VU	AUTO FLT/FAC1/28VDC	5CC1	B04
49VU	AUTO FLT/FAC1/26VAC	14CC1	B03
** ON A/C NOT FOR ALL
49VU	AUTO FLT/FAC1/28VDC	5CC1	H10
49VU	AUTO FLT/FAC1/26VAC	14CC1	H09
** ON A/C ALL
121VU	AUTO FLT/FAC2/28VDC	5CC2	M19
121VU	AUTO FLT/FAC2/26VAC	14CC2	M18

4. Procedure
Subtask 27-26-51-420-052-A

A. Installation of the Solenoid Valve
(1) Make sure that the parts retained from the removed component are clean and in the correct condition.
(2) Clean the component interfaces and the adjacent area.
(3) Do an inspection of the component interfaces and the adjacent area.
(4) Apply Non Hardening Jointing Putty-Medium Temp. Area - - (Material No.06LCG9) to the threads of the screws (1).
(5) Lubricate the new AIPC 27-26-51-01-100 PACKING (4), AIPC 27-26-51-01-110 PACKING (5), AIPC 27-26-51-01-120 PACKING (6) and AIPC 27-26-51-01-130 PACKING (9) with Phosphate Ester Hydraulic Fluid-General Power - - (Material No.02ABA1) .
(6) Put the packings (4),(5),(6) on the applicable port of the solenoid valve (3).
(7) Put the packing (9) and the lock washer (8) on the applicable port of the solenoid valve (3).
(8) Put the solenoid valve (3) into its installation position on the yaw damper (7).
(9) Install the screws (1) with the washers (2) to the solenoid valve (3) and the yaw damper (7).
(10) TORQUE the screws (1) to between 0.22 and 0.18 m.daN (19.47 and 15.93 lbf.in )

.
(11) Safety the screws (1) with lockwire, corrosion-resistant steel, dia. 0.8 mm (0.032 in.).

Subtask 27-26-51-865-058-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/FAC1/28VDC	5CC1	B04
49VU	AUTO FLT/FAC1/26VAC	14CC1	B03
** ON A/C NOT FOR ALL
49VU	AUTO FLT/FAC1/28VDC	5CC1	H10
49VU	AUTO FLT/FAC1/26VAC	14CC1	H09
** ON A/C ALL
121VU	AUTO FLT/FAC2/28VDC	5CC2	M19
121VU	AUTO FLT/FAC2/26VAC	14CC2	M18

Subtask 27-26-51-080-052-A

C. Preparation for the Test
(1) Remove the rigging pin 98D27207549000 PIN-RIGGING from the yaw damper bellcrank.
(2) Remove the container.
(3) Pressurize the reservoir of the Green and the Yellow hydraulic system (Ref. AMM TASK 29-14-00-614-002).

Subtask 27-26-51-710-052-A

D. Test
(1) Do an operational test of the yaw damper (Ref. AMM TASK 22-63-00-710-001).
(2) Do a visual check and make sure that there are no hydraulic leaks at the yaw damper.

5. Close-up
Subtask 27-26-51-410-052-B

A. Close Access
(1) Make sure that the work area is clean and clear of tools and other items.
(2) Close the access panels 325BL (for the solenoid valve on 3CC1) and/or 325BR (for the solenoid valve on 3CC2) at the trailing edge of the vertical stabilizer (Ref. AMM TASK 55-33-13-410-002).
(3) Remove the WARNING NOTICE(S).
(4) Remove the access platform(s).

[Rev.10 from 2021] 2026.03.31 23:49:54 UTC