W DOC AIRBUS | AMM A320F

Operational Check of Ram Air Turbine (RAT) Automatic Deployment

TASK 29-22-00-710-006-A
Operational Check of Ram Air Turbine (RAT) Automatic Deployment

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.
CAUTION: BE CAREFUL WHEN YOU TOUCH OR MOVE THE RAM AIR TURBINE (RAT). THE RAT BLADES ARE MADE OF COMPOSITE MATERIAL AND CAN EASILY BECOME DAMAGED.
ZONE: 197
ZONE: 210
1. Reason for the Job
Refer to the MPD TASK: 292000-05
OPERATIONAL CHECK OF RAM AIR TURBINE (RAT) AUTOMATIC DEPLOYMENT
2. Job Set-up Information
 A. Fixtures, Tools, Test and Support Equipment
REFERENCE
QTY
DESIGNATION
No specific
AR
SAFETY BARRIER(S)
 B. Work Zones and Access Panels
ZONE/ACCESS
ZONE DESCRIPTION
197
REAR FAIRING
210
CKPT,FWD COMPT BHD TO FLT COMPT BULKHEAD
195BB, 197EB
 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 29-10-00-864-003-A
Depressurize the Blue Hydraulic System
TASK 29-22-00-869-006-A
Retraction of the Ram Air Turbine (RAT) on the Ground
TASK 29-22-00-916-801-A
Protection of the Ram Air Turbine (RAT) Blades (Aluminum Blades) from Corrosion
TASK 31-32-00-860-010-A
Procedure to Get Access to the SYSTEM REPORT/TEST NAV Page
TASK 31-60-00-860-001-A
EIS Start Procedure
TASK 31-60-00-860-002-A
EIS Stop Procedure
TASK 34-10-00-860-002-A
ADIRS Start Procedure
TASK 34-10-00-860-005-A
ADIRS Stop Procedure
3. Job Set-up
Subtask 29-22-00-860-106-A
A. Aircraft Maintenance Configuration
   (1) As necessary, use the applicable SAFETY BARRIERS, specified by the operator's instructions and your local regulations.
   (2) Energize the aircraft electrical circuits
(Ref. AMM TASK 24-41-00-861-002).
   (3) Make sure that the Air Data/Inertial Reference System (ADIRS) operates (Ref. AMM TASK 34-10-00-860-002).
NOTE: Set only the OFF/NAV/ATT selector switch of CDU/ADIRU 1 to NAV position.
   (4) Do the P.F.D. part of the E.I.S. start procedure (Ref. AMM TASK 31-60-00-860-001).
Subtask 29-22-00-010-081-A
B. Open the access doors 197EB and 195BB
Subtask 29-22-00-865-108-A
C. Make sure that this(these) circuit breaker(s) is(are) closed:
PANELDESIGNATIONFINLOCATION
** ON A/C NOT FOR ALL
49VUHYD/RAT/CTL2801GED14
** ON A/C NOT FOR ALL
49VUHYD/RAT/CTL2801GEB13
** ON A/C ALL
105VUELEC/CSM/G /EV AUTO/SPLY7XEC01
106VUCSM/G /EV/MAN/SPLY6XEB04
121VUHYDRAULIC/RAT/SPLY/EXTN/SOL12803GEP33
122VUELEC/EMER GEN AUTO/29XEZ26
122VUELEC/EMER GEN AUTO/111XEZ25
4. Procedure
Subtask 29-22-00-710-066-B ** ON A/C NOT FOR ALL
WARNING: MAKE SURE THAT THE RAT TRAVEL RANGE IS CLEAR BEFORE YOU EXTEND/RETRACT THE RAT.
A. Operational Test of the Automatic Deployment of the RAT
NOTE: Make sure that a second person is in position to observe the extension of the RAT before you open the circuit breakers 9XE and 11XE.
ACTION
RESULT
1.Do the procedure to get access to the SYSTEM REPORT/TEST NAV page (Ref. AMM TASK 31-32-00-860-010).

2.On the MCDU:
  • push the line key NAV.
  • the MCDU shows the NAV menu.
3.On the MCDU:
On the MCDU:
  • push the line key ADR 1.
  • the MCDU shows the ADR 1 menu.
4.On the MCDU:
On the MCDU:
  • push the line key OUTPUT TESTS.
  • the MCDU shows the ADR 1 OUTPUT TESTS menu.
5.On the MCDU:
On the MCDU:
  • push the line key INTERFACE TEST.
  • the MCDU shows the INTERFACE TEST menu.
6.On the MCDU:
On the CAPT PFD:
  • push the line key TEST START.
  • check that the CAS is more than 100 knots after 10 seconds.
NOTE: After you push the TEST START key, and before you push the RETURN/TEST STOP key, various warnings operate. They include audio warnings, MASTER CAUTION lights and warnings on ECAM, PFD and ND CRT's. You can ignore these warnings.
7.On the panel 122VU:

  • open the circuit breaker 9XE
  • the solenoid 1 of the RAT is still not energized

  • the rat does not extend
  • close the circuit breaker 9XE
  • the solenoid 1 of the RAT is still not energized

  • the rat does not extend
  • 0pen the circuit breaker 11XE
  • the solenoid 1 of the RAT is still not energized

  • the rat does not extend
  • close the circuit breaker 11XE
  • the solenoid 1 of the RAT is still not energized

  • the rat does not extend
NOTE: - If the RAT extends as soon as the circuit breaker 9XE is opened, replace the relay 17XE.
- If the RAT extends as soon as the circuit breaker 11XE is opened, replace the relay 18XE.
8.On the panel 122VU:

  • open the circuit breakers 9XE and 11XE.
  • solenoid 1 of the RAT is energized.

  • the RAT extends.
NOTE: Do not operate the RAT deployment solenoids for more than 60 seconds. You can operate the solenoids more than once during the test. When the time of operation (solenoids energized) is max. 60 seconds, you must let the solenoids cool for 30 minutes.
9.On the panel 122VU:

  • close the circuit breakers 9XE and 11XE.

10.After RAT extension:
On the CAPT PFD:
  • push the line key RETURN/TEST STOP on the MCDU.
  • the CAS indication goes back to initial value,
  • the test procedure stops.
11.On the ADIRS CDU:

  • set the OFF/NAV/ATT selector switch to OFF position.

12.On the MCDU, push the line select key adjacent to the RETURN indication until the CFDS menu page comes into view.
Subtask 29-22-00-710-066-C ** ON A/C NOT FOR ALL
WARNING: MAKE SURE THAT THE RAT TRAVEL RANGE IS CLEAR BEFORE YOU EXTEND/RETRACT THE RAT.
A. Operational Test of the Automatic Deployment of the RAT
NOTE: Make sure that a second person is in position to observe the extension of the RAT before you open the circuit breakers 9XE and 11XE.
ACTION
RESULT
1.Do the procedure to get access to the SYSTEM REPORT/TEST NAV page (Ref. AMM TASK 31-32-00-860-010).

2.On the MCDU:
  • Push the line key NAV.
  • The MCDU shows the NAV menu.
3.On the MCDU:
On the MCDU:
  • Push the line key ADR 1.
  • The MCDU shows the ADR 1 menu.
4.On the MCDU:
On the MCDU:
  • Push the line key OUTPUT TESTS.
  • The MCDU shows the ADR 1 OUTPUT TESTS menu.
5.On the MCDU:
On the MCDU:
  • Push the line key INTERFACE TEST.
  • The MCDU shows the INTERFACE TEST menu.
6.On the MCDU:
On the CAPT PFD:
  • Push the line key TEST START.
  • Check that the CAS is more than 100 knots after 10 seconds.
NOTE: After you push the TEST START key, and before you push the RETURN/TEST STOP key, various warnings operate. They include audio warnings, MASTER CAUTION lights and warnings on ECAM, PFD and ND CRT's. You can ignore these warnings.
7.On the panel 122VU:

  • Open the circuit breaker 9XE.
  • The solenoid 1 of the RAT is still not energized.

  • The rat does not extend.
  • Close the circuit breaker 9XE.
  • The solenoid 1 of the RAT is still not energized.

  • The rat does not extend.
  • 0pen the circuit breaker 11XE.
  • The solenoid 1 of the RAT is still not energized.

  • The rat does not extend.
  • Close the circuit breaker 11XE.
  • The solenoid 1 of the RAT is still not energized.

  • The rat does not extend.
NOTE: - If the RAT extends as soon as the circuit breaker 9XE is opened, replace the relay 17XE.
- If the RAT extends as soon as the circuit breaker 11XE is opened, replace the relay 18XE.
8.On the panel 122VU:

  • Open the circuit breakers 9XE and 11XE.
  • The solenoid 1 of the RAT is energized.

  • The RAT extends.
NOTE: Do not operate the RAT deployment solenoids for more than 60 seconds. You can operate the solenoids more than once during the test. When the time of operation (solenoids energized) is max. 60 seconds, you must let the solenoids cool for 30 minutes.
9.On the panel 122VU:

  • Close the circuit breakers 9XE and 11XE.

10.After RAT extension:
On the CAPT PFD:
  • Push the line key RETURN/TEST STOP on the MCDU.
  • The CAS indication goes back to initial value.
  • The test procedure stops.
11.On the ADIRS MSU:

  • Set the OFF/NAV/ATT selector switch to OFF position.

12.On the MCDU, push the line select key adjacent to the RETURN indication until the CFDS menu page comes into view.
Subtask 29-22-00-916-051-A
B. Protection of the RAT Blades from Corrosion
NOTE: The following procedure is not necessary but Airbus recommends this step to prevent corrosion of RAT blades.
   (1) Apply protection on the RAT blades to prevent corrosion (Ref. AMM TASK 29-22-00-916-801).
Subtask 29-22-00-869-090-A
C. Retract the RAT (Ref. AMM TASK 29-22-00-869-006).
5. Close-up
Subtask 29-22-00-860-107-A
A. Put the aircraft back to the serviceable condition.
   (1) Depressurize the Blue hydraulic system
(Ref. AMM TASK 29-10-00-864-003).
   (2) Do the EIS stop procedure
(Ref. AMM TASK 31-60-00-860-002).
   (3) Do the ADIRS stop procedure (Ref. AMM TASK 34-10-00-860-005).
   (4) De-energize the aircraft electrical circuits
(Ref. AMM TASK 24-41-00-862-002).
Subtask 29-22-00-410-076-A
B. Close Access
   (1) Make sure that the work area is clean and clear of tools and other items.
   (2) Close the door of the RAT ground control panel 3GE.
   (3) Close the access doors 197EB and 195BB.
   (4) Remove the safety barriers.
[Rev.10 from 2021] 2026.04.01 04:03:57 UTC
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