Installation of the RAT Actuator

TASK 29-22-53-400-010-A
Installation of the RAT Actuator

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

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

ZONE: 195
FIN: 1GE

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	GAGE - FEELER
No specific	2	WARNING NOTICE(S)
No specific	Torque wrench: range to between 3.2 and 2.9 m.daN (23.60 and 21.39 lbf.ft )
No specific	Torque wrench: range to between 5.29 and 4.74 m.daN (39.01 and 34.96 lbf.ft )
No specific	Torque wrench: range to between 5.9 and 5.4 m.daN (43.51 and 39.82 lbf.ft )

B. Consumable Materials

REFERENCE	DESIGNATION
(Material No.02ABA1)	Phosphate Ester Hydraulic Fluid-General Power - -
(Material No.03JCA9)	Silicone base Grease-Mechanisms and Seals - -
(Material No.06LCG9)	Non Hardening Jointing Putty-Medium Temp. Area - -

C. Work Zones and Access Panels

ZONE/ACCESS	ZONE DESCRIPTION
195	HYDRAULIC COMPT AND FAIRINGS
147BB, 147CB, 195BB

D. Expendable Parts

FIG.ITEM	DESIGNATION	IPC-CSN
11	COTTER PIN	AIPC 29-22-03-03-080
17	COTTER PIN	AIPC 29-22-03-03-080
11	COTTER PIN	AIPC 29-22-83-03-180
17	COTTER PIN	AIPC 29-22-83-03-180

E. Referenced Information

REFERENCE	DESIGNATION
TASK 20-28-00-912-802-A	Electrical Bonding - General Maintenance Procedure
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 29-10-00-863-003-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 29-14-00-614-001-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 29-22-00-710-006-A	Operational Check of Ram Air Turbine (RAT) Automatic Deployment
TASK 29-22-00-820-004-A	Adjustment of the RAT Doors
TASK 29-22-00-869-006-A	Retraction of the Ram Air Turbine (RAT) on the Ground
TASK 32-12-00-010-001-A	Open the Main Gear Doors for Access
RAT Actuator - Protective Cover
RAT Actuator 1GE

3. Job Set-up
Subtask 29-22-53-860-081-A

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 Blue hydraulic system is depressurized and put it in the maintenance configuration.
(Ref. AMM TASK 29-00-00-864-001).
(3) Make sure that the reservoir of the Blue hydraulic system is depressurized.
(Ref. AMM TASK 29-14-00-614-001).
(4) Make sure that the left main landing-gear door is open (Ref. AMM TASK 32-12-00-010-001).
(5) Make sure that the access door 195BB is open.
(6) Make sure that the access panel 147BB is open.
(7) Make sure that the access panel 147CB is open.
(8) Make sure that the WARNING NOTICE(S) are in position to tell persons not to pressurize the Blue hydraulic system:

In the cockpit on the hydraulic section 40VU of the overhead panel.
On the ground service panel of the Blue hydraulic system.

(9) Make sure that the container is in position below the hydraulic connections of the Ram Air Turbine.
(10) Make sure that the safety barriers are in position.

Subtask 29-22-53-865-077-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	HYD/RAT/CTL	2801GE	D14
** ON A/C NOT FOR ALL
49VU	HYD/RAT/CTL	2801GE	B13
** ON A/C ALL
106VU	CSM/G /EV/MAN/SPLY	6XE	B04
121VU	HYDRAULIC/RAT/SPLY/EXTN/SOL1	2803GE	P33

4. Procedure
Subtask 29-22-53-210-056-A

A. Preparation for Installation
(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) Make sure that the hydraulic line end-fittings are serviceable.
(5) Make sure that all the electrical connections are clean and in the correct condition.
(6) Apply Non Hardening Jointing Putty-Medium Temp. Area - - (Material No.06LCG9) to the shaft of the bolts (1),(19) and (20).
(7) Apply Silicone base Grease-Mechanisms and Seals - - (Material No.03JCA9) to the support shafts (31) of the RAT actuator (27).

Subtask 29-22-53-420-062-A

B. Installation of the RAT Actuator

CAUTION: USE A SECOND WRENCH TO APPLY COUNTERTORQUE TO THE UNION WHEN YOU DISCONNECT/CONNECT HYDRAULIC LINES ON UNIONS. IF YOU DO NOT USE THE SECOND WRENCH, THERE IS A RISK THAT YOU WILL LOOSEN OR TIGHTEN THE UNION TOO MUCH.

CAUTION: YOU MUST INSTALL HYDRAULIC TUBES WITH HYDRAULIC FLUID AS LUBRICANT.

(1) Put the eye-end (44) of the RAT actuator (27) between the forked mounting (43) of the leg assembly (40).
(2) Install the bolt (42), the washers (41), the washer (45) and the nut (46). Do not tighten the nut (46) at this time.
(3) Put the rear gimbal half (5) on the RAT actuator (27).
(4) Carefully raise the RAT actuator (27) to its correct installation position.
(5) Hold the gimbal half (5) with your hand.
(6) Install the bolts (19) and (20) into the upper section of the structure (8) and (18).
(7) Put the forward gimbal half (14) on the RAT actuator (27).
(8) Make sure that the bolts (19) and (20) are in the correct position between the gimbal halves (5) and (14).
(9) Install the bolts (13) and the washers (12).
(10) Install the nuts (6) and the washers (7), but do not tighten the nuts (6) at this time.
(11) Install the washers (9) and (15) and the nuts (10) and (16).
(12) Tighten the nut (10) and safety it with a new AIPC 29-22-03-03-080 COTTER PIN (11) or AIPC 29-22-83-03-180 COTTER PIN (11).
(13) Tighten the nut (16) and safety it with a new AIPC 29-22-03-03-080 COTTER PIN (17) or AIPC 29-22-83-03-180 COTTER PIN (17).
(14) Tighten the nuts (6).
(15) Put the bonding strap (37) in position and install the washer (36) and the screw (35) (Ref. AMM TASK 20-28-00-912-802).
(16) Remove the protective caps from the electrical connectors and the receptacles.
(17) Connect the electrical connectors (25), (28), (33), (34) and (38) to their related receptacles.
(18) Remove the blanking caps from the hydraulic line end-fittings.
(19) Apply the Phosphate Ester Hydraulic Fluid-General Power - - (Material No.02ABA1) to the threads of the line end-fittings.
(20) Remove the blanking plugs from the hydraulic ports.
(21) Attach the union nuts (29) and (30) to their related ports.
(22) TORQUE the union nut (29) to between 5.9 and 5.4 m.daN (43.51 and 39.82 lbf.ft )

.
(23) TORQUE the union nut (30) to between 3.2 and 2.9 m.daN (23.60 and 21.39 lbf.ft )

.
(24) TORQUE the nut (46) to between 5.29 and 4.74 m.daN (39.01 and 34.96 lbf.ft )

.
(25) With the GAGE - FEELER measure the axial clearance between the forked mounting (43) and the washers (41).

NOTE: An axial clearance of 1.32 mm (0.0520 in.) to 1.82 mm (0.0717 in.) between the forked mounting (43) and the washers (41) is permitted.

Subtask 29-22-53-790-052-A

C. Leak Test of the Hydraulic Connections
(1) Remove the CONTAINER 5 L (1.32 USGAL) from below the hydraulic connections.
(2) Make sure that the work area is clean and clear of tools and other items.
(3) Pressurize the reservoir of the Blue hydraulic system (Ref. AMM TASK 29-14-00-614-002).
(4) Pressurize the Blue hydraulic system (Ref. AMM TASK 29-10-00-863-003).
(5) Examine the hydraulic connections of the RAT actuator and make sure that there are no leaks.
(6) Depressurize the Blue hydraulic system (Ref. AMM TASK 29-10-00-864-003).

Subtask 29-22-53-820-053-A

D. Adjustment of the RAT Doors
(1) Do the adjustment procedure of the RAT doors (Ref. AMM TASK 29-22-00-820-004).
(2) If you can not adjust the doors correctly, do the adjustment procedure of the RAT actuator (Ref. AMM TASK 29-22-00-820-004).

Subtask 29-22-53-869-052-A

E. Retract the RAT (Ref. AMM TASK 29-22-00-869-006).

Subtask 29-22-53-710-060-A

F. Do an operational test of the automatic deployment of the RAT (Ref. AMM TASK 29-22-00-710-006).

5. Close-up
Subtask 29-22-53-410-059-A

A. Close Access
(1) Put the protective cover (2) in the correct installation position over the deployment solenoids

RAT Actuator - Protective Cover

.
(a) Tighten the screws (1) in the quick release fasteners (3).
(b) Install the screw (5) in the protective cover (2).
(2) Install the access panels 147BB 147CB.
(3) Close the left main landing-gear door (Ref. AMM TASK 32-12-00-010-001).
(4) Close the access door 195BB.

Subtask 29-22-53-942-056-A

B. Put the aircraft back to the serviceable condition.
(1) Remove the access platform(s).
(2) Remove the safety barrier.
(3) Remove the WARNING NOTICE(S).

[Rev.10 from 2021] 2026.04.01 08:11:11 UTC