Visual Inspection of the Rudder Servo Controls for Hydraulic Leakage

TASK 27-24-00-210-001-A
Visual Inspection of the Rudder Servo Controls for Hydraulic Leakage

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: 325
FIN: 1025GM
FIN: 2025GM
FIN: 3025GM

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 10M (33 FT) - ADJUSTABLE

B. Work Zones and Access Panels

ZONE/ACCESS	ZONE DESCRIPTION
325	VERTICAL STABILIZER TRAILING EDGE
325CL, 325CR, 325DL, 325DR

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 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 29-10-00-863-003-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 29-10-00-864-003-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 29-24-00-863-001-A	Pressurize the Yellow Hydraulic System with the Electric Pump
TASK 29-24-00-864-001-A	Depressurize the Yellow Hydraulic System
Servocontrol - Location of the Vent Hole

3. Job Set-up
Subtask 27-24-00-010-053-A

A. Get Access
(1) Put an ACCESS PLATFORM 10M (33 FT) - ADJUSTABLE in position at zone 325.
(2) Open the access doors 325CL 325DL 325CR 325DR

Subtask 27-24-00-860-051-A

B. Aircraft Maintenance Configuration
(1) Energize the aircraft electrical circuits
(Ref. AMM TASK 24-41-00-861-002)
(2) Pressurize the aircraft hydraulic systems
(Ref. AMM TASK 29-23-00-863-001) (Ref. AMM TASK 29-24-00-863-001) (Ref. AMM TASK 29-10-00-863-003)

4. Procedure
Subtask 27-24-00-210-051-A

WARNING: DO NOT TOUCH THE SERVO CONTROLS DURING OPERATION OF THE PEDALS. MOVEMENT OF THE SERVO CONTROLS CAN CAUSE INJURY.

A. Visual Inspection of the Rudder Servocontrol for Hydraulic Leakage

WARNING: MAKE SURE THAT PERSONS DO NOT OPERATE THE PEDALS WHEN YOU CLEAN THE VENT HOLE. OPERATION OF THE SERVO CONTROL WHEN YOU CLEAN THE VENT HOLE CAN BE DANGEROUS.

(1) Do several cycles of the rudder with the CAPT or F/O pedals.

(2) Clean the vent hole (1) and the area around the vent hole of each servocontrol

Servocontrol - Location of the Vent Hole

(3) Do again several cycles of the rudder with the CAPT or F/O pedals.
(4) Do a visual check of the vent hole and the area around the vent hole.
Make sure that you can see no leak.

5. Close-up
Subtask 27-24-00-860-052-A

A. Put the aircraft back to its initial configuration.
(1) Depressurize the aircraft hydraulic systems
(Ref. AMM TASK 29-23-00-864-001) (Ref. AMM TASK 29-24-00-864-001) (Ref. AMM TASK 29-10-00-864-003)
(2) De-energize the aircraft electrical circuits
(Ref. AMM TASK 24-41-00-862-002)

Subtask 27-24-00-410-052-A

B. Close Access
(1) Close the access doors 325CL 325DL 325CR 325DR
(2) Remove the access platform(s).

[Rev.10 from 2021] 2026.03.31 23:49:24 UTC