Removal of the Solenoid Valve of the Elevator Servo-Control Actuator

TASK 27-34-51-000-005-A
Removal of the Solenoid Valve of the Elevator Servo-Control Actuator

WARNING: MAKE SURE THAT THE GROUND SAFETY-LOCKS ARE IN POSITION ON THE LANDING GEAR. THIS WILL PREVENT UNWANTED MOVEMENT OF THE LANDING GEAR, AND THUS POSSIBLE INJURY TO PERSONS AND DAMAGE TO THE AIRCRAFT AND/OR 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: 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: YOU MUST PUT ON AND ATTACH A SAFETY HARNESS BEFORE YOU START WORK:

ON THE THS OR IN THE REAR FUSELAGE
ON TOP OF THE WINGS OR PYLONS.

WITHOUT A SAFETY HARNESS, YOU CAN FALL. THIS CAN KILL YOU OR CAUSE YOU INJURY.

CAUTION: DO NOT CAUSE DAMAGE TO THE SURFACES. THE COMPONENTS ARE MADE OF CARBONFIBER REINFORCED PLASTIC.

NOTE: Only the removal of one solenoid valve of elevator servo-control actuator 34CE1 is given. The removal of solenoid valves 1 and 2 of elevator servo-control actuators 34CE2, 34CE3 and 34CE4 is the same.

ZONE: 334
ZONE: 344

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 2M (6 FT) - ADJUSTABLE
No specific	1	ACCESS PLATFORM 5M (16 FT)- ADJUSTABLE
No specific	AR	SAFETY BARRIER(S)
No specific	AR	SAFETY CLIP - CIRCUIT BREAKER
No specific	AR	WARNING NOTICE(S)
98D27309001000	1	NEUTRAL SETTING TOOL - ELEVATOR
98D27309009003	1	COLLAR-DEPTH ACTUATOR
98D27309009004	1	COLLAR-DEPTH ACTUATOR
98D27903500000	2	PIN-SIDE STICK LOCKING
98L12003001000	AR	HARNESS,SAFETY

B. Work Zones and Access Panels

ZONE/ACCESS	ZONE DESCRIPTION
334	THS TRAILING EDGE
344	THS TRAILING EDGE
334DB, 344DB, 822

C. Referenced Information

REFERENCE	DESIGNATION
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 29-14-00-614-001-A	Depressurization of the Hydraulic Reservoirs
TASK 29-23-00-864-001-A	Depressurize the Green and Yellow Hydraulic Systems after Operation of the PTU
TASK 55-13-11-000-001-A	Remove/Open of the Trimmable Horizontal Stabilizer (THS) Trailing-Edge Access-Panels
Servocontrol Elevator - Installation of the Tool-Elevator Neutral Setting
Solenoid Valve of the Elevator Servo-Control Actuator

3. Job Set-up
Subtask 27-34-51-941-054-A

A. Safety Precautions
(1) As necessary, use the applicable SAFETY BARRIERS, specified by the operator's instructions and your local regulations.
(2) Put WARNING NOTICE(S) in the flight compartment to tell persons not to operate the flight controls.
(3) Put WARNING NOTICE(S) in position to tell persons not pressurize the hydraulic systems.

Subtask 27-34-51-860-054-A

B. Aircraft Maintenance Configuration
(1) Set the elevator and the horizontal stabilizer controls to the neutral position.

NOTE: The use of the Neutral Setting Tool (98D27309001000) is optional. You can use any other tool to align the elevator to neutral position during the removal of the Solenoid Valve.

(2) Make sure that the hydraulic systems are depressurized
(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) and (Ref. AMM TASK 29-10-00-864-003).
(3) Make sure that the hydraulic reservoirs are depressurized (Ref. AMM TASK 29-14-00-614-001).

Subtask 27-34-51-010-054-A

C. Get Access
(1) Put the ACCESS PLATFORM 2M (6 FT) - ADJUSTABLE in position at avionics compartment door 822.
(a) Open access door 822.
(b) Open the access panel of battery power center 105VU.
(2) Put on a safety harness:

WARNING: BEFORE YOU START WORK, YOU MUST PUT ON A SAFETY HARNESS AND ATTACH IT TO THE ACCESS PLATFORM. WITHOUT A SAFETY HARNESS, YOU CAN FALL. THIS CAN KILL YOU OR CAUSE YOU INJURY.

(a) Put on and attach a 98L12003001000 HARNESS,SAFETY before you start work in the work area.
(3) Put the ACCESS PLATFORM 5M (16 FT)- ADJUSTABLE in position at zone 334 (344).
(4) Open trailing-edge access panel 334DB ( 344DB) (Ref. AMM TASK 55-13-11-000-001).

Subtask 27-34-51-865-056-A

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

PANEL	DESIGNATION	FIN	LOCATION
** ON A/C NOT FOR ALL
49VU	FLIGHT CONTROLS/ELAC1/NORM/SPLY	15CE1	B11
49VU	FLIGHT CONTROLS/FCDC1/SPLY	20CE1	B10
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/FCDC1/SPLY	20CE1	B05
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
105VU	FLT CTL/SEC1/STBY SPLY	22CE	B01
121VU	FLIGHT CONTROLS/FCDC2/SPLY	20CE2	Q20
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 27-34-51-481-051-A

E. Installation of the Locking Devices
(1) Install the 98D27903500000 PIN-SIDE STICK LOCKING in the CAPT and F/O side stick controllers.
(2) Move the elevator by hand to the upper position and install one of the subsequent tools:
(a) Install the 98D27309009003 COLLAR-DEPTH ACTUATOR or the 98D27309009004 COLLAR-DEPTH ACTUATOR on the elevator servo-control actuator.
(b) Install the 98D27309001000 NEUTRAL SETTING TOOL - ELEVATOR on the elevator:

Servocontrol Elevator - Installation of the Tool-Elevator Neutral Setting

1 Remove the cover from the THS hoisting point at RIB11.
2 Release the wing nut (6).
3 Push the plate assembly (5) on the THS trailing edge.
4 Make sure that the center plate (7) and the forward plate (8) are on the THS surface.
5 Remove the T-handle screw (1) and the washer (2) from the stowage on the center plate (7).
6 Install the T-handle screw (1) and the washer (2) through the center plate (7) and the THS hoisting point.
7 Make sure that:

The forward plate (8) is on the line of the rivets that attach the THS leading edge to the THS front spar.
The bars (3) follow the line of RIB11.
The THS trailing edge is in the correct position between the two parts of the plate assembly (5).

8 Tighten the T-handle screw (1) and the wing nut (6).

4. Procedure
Subtask 27-34-51-020-054-A

A. Removal of the Solenoid Valve of the Elevator Servo-Control Actuator
(1) Make match marks on the components that you disconnect/remove to record their connections/positions. This is important for the subsequent installation procedure.
(2) Remove the lockwire:

WARNING: USE PROTECTIVE GOGGLES AND GLOVES WHEN YOU REMOVE OR INSTALL LOCKWIRE. EACH TIME YOU CUT LOCKWIRE, REMOVE AND DISCARD IT IMMEDIATELY. LOOSE LOCKWIRE CAN CUT YOU OR MAKE YOU BLIND, AND/OR CAN CAUSE DAMAGE.

(a) Cut and discard the lockwire between the bolts (5) and the solenoid valve (3) or (4).
(3) Remove the bolts (5) and hold the solenoid valve (3) or (4) on the elevator servo-control actuator (1).
(4) Remove the solenoid valve (3) or (4) from the elevator servo-control actuator (1).
(5) Remove and discard the O-ring (2).
(6) Install a protective cover on the mounting face of the solenoid valve (3) or (4).

[Rev.10 from 2021] 2026.03.31 23:50:29 UTC