RAT Extension Control - Check of the RAT Manual Extension

TASK 24-20-00-040-002-A
RAT Extension Control - Check of the RAT Manual Extension

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 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.

1. Reason for the Job
MMEL 24-24-02A
RAT EXTENSION AUTOMATIC CONTROL
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	AR	SAFETY BARRIER(S)
No specific	AR	WARNING NOTICE(S)

B. Work Zones and Access Panels

ZONE/ACCESS	ZONE DESCRIPTION
812

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 29-22-00-869-005-A	Extension of the Ram Air Turbine (RAT) on the Ground
TASK 29-22-00-869-006-A	Retraction of the Ram Air Turbine (RAT) on the Ground
RAT control

3. Job Set-up
Subtask 24-20-00-860-053-A

A. Aircraft Maintenance Configuration
(1) Make sure that the WARNING NOTICE(S) are in position.
(2) As necessary, use the applicable SAFETY BARRIERS, specified by the operator's instructions and your local regulations.
(3) Energize the aircraft electrical circuits
(Ref. AMM TASK 24-41-00-861-002).
(4) Pressurize the Blue hydraulic system
(Ref. AMM TASK 29-10-00-863-003).

Subtask 24-20-00-010-050-A

B. Get access to the avionics compartment.
(1) Put an ACCESS PLATFORM 2M (6 FT) - ADJUSTABLE at the access door 812 of the avionics compartment.
(2) Open the access door 812.

Subtask 24-20-00-865-050-A

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

PANEL	DESIGNATION	FIN	LOCATION
** ON A/C ALL
106VU	CSM/G /EV/MAN/SPLY	6XE	B04

4. Procedure

WARNING: MAKE SURE THAT THE RAT TRAVEL RANGE IS CLEAR BEFORE YOU EXTEND/RETRACT THE RAT.

Subtask 24-20-00-710-053-B

A. Extension of the RAT
(1) Do the extension of the Ram Air Turbine (RAT) on the ground (Ref. AMM TASK 29-22-00-869-005).

Subtask 24-20-00-710-054-B

B. Retraction of the RAT
(1) Do the retraction of the Ram Air Turbine (RAT) on the ground (Ref. AMM TASK 29-22-00-869-006).

5. Close-up
Subtask 24-20-00-860-052-A

A. Put the aircraft back to its initial configuration.
(1) Depressurize the Blue hydraulic system
(Ref. AMM TASK 29-10-00-864-003).
(2) De-energize the aircraft electrical circuits
(Ref. AMM TASK 24-41-00-862-002).
(3) Remove the WARNING NOTICE(S).
(4) Remove the safety barriers.

Subtask 24-20-00-410-050-A

B. Close Access
(1) Close the access door 812.
(2) Remove the access platform(s).

[Rev.10 from 2021] 2026.03.31 23:19:26 UTC