Servicing of the Elevator Servo Control Actuator Filter

TASK 27-34-42-600-001-A
Servicing of the Elevator Servo Control Actuator Filter

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: MAKE SURE THAT THE CONTROLS AGREE WITH THE POSITION OF THE ITEMS THEY OPERATE BEFORE YOU PRESSURIZE A HYDRAULIC SYSTEM. UNWANTED MOVEMENT OF HYDRAULICALLY OPERATED ITEMS CAN CAUSE SERIOUS INJURY AND/OR DAMAGE.

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.

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	ACCESS PLATFORM 5M (16 FT)- ADJUSTABLE
No specific	1	CONTAINER 5 L (1.32 USGAL)
No specific	AR	SAFETY CLIP - CIRCUIT BREAKER
No specific	AR	WARNING NOTICE(S)
98D27903500000	2	PIN-SIDE STICK LOCKING

B. Consumable Materials

REFERENCE	DESIGNATION
(Material No.02ABA1)	Phosphate Ester Hydraulic Fluid-General Power - -
No specific	lockwire-corrosion resistant steel 0.6mm dia

C. Work Zones and Access Panels

ZONE/ACCESS	ZONE DESCRIPTION
334DB, 344DB

D. Referenced Information

REFERENCE	DESIGNATION
TASK 12-12-29-611-001-A	Fill the Hydraulic Fluid Reservoir with a Hand Pump
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 55-13-11-000-001-A	Remove/Open of the Trimmable Horizontal Stabilizer (THS) Trailing-Edge Access-Panels
TASK 55-13-11-400-001-A	Install/Close of the Trimmable Horizontal Stabilizer (THS) Trailing-Edge Access-Panels
Elevator Servo-control Actuator Filter

3. Job Set-up
Subtask 27-34-42-860-050-A

A. Depressurize Hydraulic Systems
(1) Depressurize the Green, Yellow and Blue 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) and (Ref. AMM TASK 29-10-00-864-003).

Subtask 27-34-42-865-050-A

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

PANEL	DESIGNATION	FIN	LOCATION
** ON A/C NOT FOR ALL
49VU	FLIGHT CONTROLS/THS/ACTR/MOT2	19CE2	B09
** ON A/C NOT FOR ALL
49VU	FLIGHT CONTROLS/THS/ACTR/MOT2	19CE2	B04
** ON A/C ALL
121VU	FLIGHT CONTROLS/THS ACTR/MOT3	19CE3	Q17
121VU	FLIGHT CONTROLS/THS ACTR/MOT1	19CE1	Q16

Subtask 27-34-42-481-050-A

C. Install Locking Devices
(1) Put the 98D27903500000 PIN-SIDE STICK LOCKING in the CAPT and F/O side stick controllers.

Subtask 27-34-42-941-050-A

D. Safety Precautions.
(1) Put the WARNING NOTICE(S) in position to tell persons not to operate the flight controls.
(2) Put the WARNING NOTICE(S) in position to tell persons not to pressurize the hydraulic systems.
(3) Put the ACCESS PLATFORM 5M (16 FT)- ADJUSTABLE in position at zone 334 for the left hand trailing edge access panels and 344 for the right hand trailing edge access panels.

Subtask 27-34-42-010-050-A

E. Access
(1) Open the trailing edge access panels 334DB 344DB (Ref. AMM TASK 55-13-11-000-001).

4. Procedure

WARNING: DO NOT GET HYDRAULIC FLUID ON YOUR SKIN, IN YOUR EYES OR IN YOUR MOUTH. HYDRAULIC FLUID IS POISONOUS AND CAN GO THROUGH YOUR SKIN AND INTO YOUR BODY. FLUSH HYDRAULIC FLUID FROM YOUR EYES, MOUTH OR SKIN WITH WATER. GET MEDICAL AID IF YOU GET HYDRAULIC FLUID IN YOUR EYES OR MOUTH.

Subtask 27-34-42-010-051-A

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. Removal of the Filter

NOTE: The removal of the filter(1) from the elevator servo-control actuator 34CE1 is given. The removal of the filter (1) from the elevator servo-control actuators 34CE2, 34CE3 and 34CE4 is the same.

(1) Remove and discard the lockwire from the connection of the filter (1) and the supply block (3).
(2) Put the CONTAINER 5 L (1.32 USGAL) below the filter (1) to collect the unwanted hydraulic fluid.

NOTE: Make sure that the hydraulic fluid is removed if it drops onto components or structure

(3) Remove the filter (1) from the supply block (3).
(4) Remove and discard the packing (2) from the filter (1).
(5) Remove and discard the unwanted hydraulic fluid.

Subtask 27-34-42-640-050-A

B. Preparation for Installation
(1) Lubricate the packing (2) with Phosphate Ester Hydraulic Fluid-General Power - - (Material No.02ABA1) .

NOTE: Make sure that Phosphate Ester Hydraulic Fluid-General Power - - (Material No.02ABA1) is removed if it drops onto components or structure.

Subtask 27-34-42-420-050-A

C. Install the Filter

(1) Install the filter (1) into the supply block (3).
(2) Safety the filter (1) with lockwire-corrosion resistant steel 0.6mm dia to the supply block (3).
(3) Remove all signs of hydraulic fluid from the filter area.

NOTE: Make sure that the hydraulic fluid is removed if it drops onto components or structure.

Subtask 27-34-42-081-050-A

D. Remove Locking Devices
(1) Remove the 98D27903500000 PIN-SIDE STICK LOCKING from the CAPT and F/O side stick controllers.

Subtask 27-34-42-865-051-A

E. 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	FLIGHT CONTROLS/THS/ACTR/MOT2	19CE2	B09
** ON A/C NOT FOR ALL
49VU	FLIGHT CONTROLS/THS/ACTR/MOT2	19CE2	B04
** ON A/C ALL
121VU	FLIGHT CONTROLS/THS ACTR/MOT3	19CE3	Q17
121VU	FLIGHT CONTROLS/THS ACTR/MOT1	19CE1	Q16

Subtask 27-34-42-860-051-A

F. Pressurize Hydraulic Systems
(1) 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) and (Ref. AMM TASK 29-10-00-863-003).

Subtask 27-34-42-870-050-A

G. Bleeding
(1) Bleed the elevator servo-control actuators.
(a) Operate the side stick to move the elevator surfaces.
(b) Do this ten times and then put the side stick back to the neutral position.

Subtask 27-34-42-210-050-A

H. Visual Inspection
(1) Make sure that there are no leaks at the joint between the filter (1) and the supply block (3).

5. Close-up
Subtask 27-34-42-410-051-A

A. Visual Inspection
(1) Make sure that the work area is clean and clear of tools and other items.

Subtask 27-34-42-410-050-A

B. Close Access
(1) Close the trailing-edge access panels 334DB 344DB (Ref. AMM TASK 55-13-11-400-001).

Subtask 27-34-42-611-050-A

C. Replenish Hydraulic System

(1) If necessary,replenish the hydraulic system (Ref. AMM TASK 12-12-29-611-001).

Subtask 27-34-42-942-051-A

D. Remove Ground Equipment
(1) Remove the access platform(s).
(2) Remove the WARNING NOTICE(S).

[Rev.10 from 2021] 2026.03.31 23:50:22 UTC