W DOC AIRBUS | AMM A320F

Functional Check of Anti-icing Device Magnets

TASK 29-22-00-280-002-A
Functional Check of Anti-icing Device Magnets

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 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.
ZONE: 190
ZONE: 197
FIN: 2GE
1. Reason for the Job
Refer to the MPD TASK: 292000-07
FUNCTIONAL CHECK OF ANTI-ICING DEVICE MAGNETS
2. Job Set-up Information
 A. Fixtures, Tools, Test and Support Equipment
REFERENCE
QTY
DESIGNATION
No specific
AR
SAFETY BARRIER(S)
No specific
AR
SAFETY CLIP - CIRCUIT BREAKER
No specific
2
WARNING NOTICE(S)
No specific
1
WRENCH - HEXAGONAL
No specific
Torque wrench: range to between 95 and 86 lbf.in (1.07 and 0.97 m.daN ) T
99D29207556000
1
TESTER-DE-ICING,RAT
 B. Work Zones and Access Panels
ZONE/ACCESS
ZONE DESCRIPTION
190
BELLY FAIR, AIR CONDITIONING & HYD COMPT
197
REAR FAIRING
 C. Referenced Information
REFERENCE
DESIGNATION
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 29-22-00-869-005-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
TASK 29-22-51-000-010-A
Removal of the Ram Air Turbine
TASK 29-22-51-400-010-A
Installation of the Ram Air Turbine
F RAT De-icing Device Test
3. Job Set-up
Subtask 29-22-00-860-113-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) As necessary, use the applicable SAFETY BARRIERS, specified by the operator's instructions and your local regulations.
   (3) Put the WARNING NOTICE(S) 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.
   (4) Make sure that the Blue hydraulic system is depressurized and put it in the maintenance configuration.
(Ref. AMM TASK 29-00-00-864-001).
   (5) Depressurize the reservoir of the Blue hydraulic system (Ref. AMM TASK 29-14-00-614-001).
WARNING: MAKE SURE THAT THE RAT TRAVEL RANGE IS CLEAR BEFORE YOU EXTEND/RETRACT THE RAT.
   (6) Extend the Ram Air Turbine (RAT) (Ref. AMM TASK 29-22-00-869-005).
Subtask 29-22-00-865-115-A
B. Open, safety and tag this(these) circuit breaker(s):
PANELDESIGNATIONFINLOCATION
** ON A/C NOT FOR ALL
49VUHYD/RAT/CTL2801GED14
** ON A/C NOT FOR ALL
49VUHYD/RAT/CTL2801GEB13
** ON A/C ALL
106VUCSM/G /EV/MAN/SPLY6XEB04
121VUHYDRAULIC/RAT/SPLY/EXTN/SOL12803GEP33
4. Procedure
Subtask 29-22-00-280-053-A
A. Functional Test of the RAT De-icing Device
   (1) Attach the 99D29207556000 TESTER-DE-ICING,RAT (7) in front of the RAT hub (8).
   (2) Turn the 99D29207556000 TESTER-DE-ICING,RAT (7) to align the chambers with the iron filings with the magnets on the inside of the RAT hub (8).
   (3) Make sure that the iron filings are aligned with the magnetic fields of all ten magnets.
   (4) If the iron filings in one or more chambers are not aligned with the related magnetic field, replace the RAT (Ref. AMM TASK 29-22-51-000-010) and (Ref. AMM TASK 29-22-51-400-010).
NOTE: You can identify a defective magnet as follows:
  • The iron filings stay at the lower side of the chamber while you align the 99D29207556000 TESTER-DE-ICING,RAT with the magnets.
   (5) Remove the bolts (3), the washers (2) and the cover plate (1).
   (6) Put a WRENCH - HEXAGONAL,(recess type, size 0.250 in.) (5) into the magnet stator shaft (6) at the rear of the RAT gearbox housing (4).
   (7) Turn the magnet stator shaft (6) approximately 36 degrees in clockwise and counterclockwise direction.
   (8) Make sure that the iron filings follow the magnetic fields while you turn the magnet stator shaft (6).
   (9) If the iron filings do not follow the magnetic fields, replace the RAT (Ref. AMM TASK 29-22-51-000-010) and (Ref. AMM TASK 29-22-51-400-010).
   (10) Remove the hexagonal recess type wrench (5) from the magnet stator shaft (6).
   (11) Remove the 99D29207556000 TESTER-DE-ICING,RAT (7) from the RAT hub (8).
   (12) Install the cover plate (1), the washers (2) and the bolts (3).
   (13) TORQUE the bolts (3) to between 95 and 86 lbf.in (1.07 and 0.97 m.daN ) T.
5. Close-up
Subtask 29-22-00-865-116-A
A. Remove the safety clip(s) and the tag(s) and close this(these) circuit breaker(s):
PANELDESIGNATIONFINLOCATION
** ON A/C NOT FOR ALL
49VUHYD/RAT/CTL2801GED14
** ON A/C NOT FOR ALL
49VUHYD/RAT/CTL2801GEB13
** ON A/C ALL
106VUCSM/G /EV/MAN/SPLY6XEB04
121VUHYDRAULIC/RAT/SPLY/EXTN/SOL12803GEP33
Subtask 29-22-00-860-114-A
B. Aircraft Maintenance Configuration
   (1) Make sure that the work area is clean and clear of tools and other items.
   (2) Pressurize the reservoir of the Blue hydraulic system (Ref. AMM TASK 29-14-00-614-002).
   (3) Pressurize the Blue hydraulic system (Ref. AMM TASK 29-10-00-863-003).
WARNING: MAKE SURE THAT THE RAT TRAVEL RANGE IS CLEAR BEFORE YOU EXTEND/RETRACT THE RAT.
   (4) Retract the RAT (Ref. AMM TASK 29-22-00-869-006).
   (5) Depressurize the Blue hydraulic system (Ref. AMM TASK 29-10-00-864-003).
   (6) Make sure that the work area is clean and clear of tools and other items.
   (7) Remove the safety barriers.
   (8) Remove the WARNING NOTICE(S).
[Rev.10 from 2021] 2026.04.01 00:26:01 UTC
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