W DOC AIRBUS | AMM A320F

Inspection of the Pressure Indicating Tubes

TASK 36-21-49-200-010-B
Inspection of the Pressure Indicating Tubes

WARNING: BE CAREFUL WHEN YOU DO WORK ON THE ENGINE PARTS AFTER THE ENGINE SHUTDOWN. USE APPLICABLE THERMAL GLOVES. THE ENGINE PARTS CAN STAY HOT FOR ONE HOUR AFTER SHUTDOWN AND CAN BURN YOU.
WARNING: BE CAREFUL WHEN YOU USE CONSUMABLE MATERIALS. OBEY THE MATERIAL MANUFACTURER'S INSTRUCTIONS AND YOUR LOCAL REGULATIONS.
1. Reason for the Job
This TASK gives the procedure for a general inspection of the pressure indicating tubes without component removal.
2. Job Set-up Information
 A. Fixtures, Tools, Test and Support Equipment
REFERENCE
QTY
DESIGNATION
No specific
AR
ACCESS PLATFORM 2M (6 FT) - ADJUSTABLE
No specific
AR
LIGHT SOURCE - INSPECTION
No specific
AR
MIRROR - INSPECTION
No specific
AR
SAFETY CLIP - CIRCUIT BREAKER
No specific
AR
WARNING NOTICE(S)
 B. Consumable Materials
REFERENCE
DESIGNATION
(Material No.V01-002)
cleaning fluid
(Material No.14SBA1)
Textile-Lint free Cotton -
 C. Work Zones and Access Panels
ZONE/ACCESS
ZONE DESCRIPTION
FOR [1000EM1] (ENGINE-1)
437AL, 438AR, 451AL, 452AR
FOR [1000EM2] (ENGINE-2)
447AL, 448AR, 461AL, 462AR
 D. 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 71-13-00-010-010-A
Opening of the Fan Cowls 437AL(447AL),438AR(448AR)
TASK 71-13-00-410-010-A
Closing of the Fan Cowls 437AL(447AL),438AR(448AR)
TASK 78-30-00-040-012-A
Deactivation of the Thrust Reverser Hydraulic Control Unit (HCU) for Ground Maintenance
TASK 78-30-00-440-012-A
Re-activation of the Thrust Reverser Hydraulic Control Unit (HCU) after Ground Maintenance
TASK 78-32-00-010-010-A
Opening of the Thrust Reverser Halves
TASK 78-32-00-410-010-A
Closing of the Thrust Reverser Halves
F Pressure Indicating Tubes and Hoses
3. Job Set-up
Subtask 36-21-49-861-053-A ** ON A/C NOT FOR ALL
A. Energize the aircraft electrical circuits
(Ref. AMM TASK 24-41-00-861-002).
Subtask 36-21-49-941-061-A ** ON A/C NOT FOR ALL
B. Safety Precautions
   (1) Make sure that the engine 1(2) is shut down for at least 5 minutes.
   (2) On the AIR COND panel 30VU:
  • make sure that the ENG 1(2) BLEED pushbutton switch is released (OFF legend is on),
  • make sure that the APU BLEED pushbutton switch is released (ON legend is off),
  • put a WARNING NOTICE(S) to tell persons not to operate the pneumatic system.
   (3) On the ENG panel 115VU:
  • put a WARNING NOTICE(S) to tell the persons not to start the engine 1(2).
   (4) On the HP ground connector:
  • put a WARNING NOTICE(S) to tell persons not to pressurize the pneumatic system.
   (5) On the MAINTENANCE panel 50VU:
  • make sure that the ON legend of the ENG/FADEC GND PWR 1(2) pushbutton switch is off.
  • put a WARNING NOTICE(S) to tell persons not to energize the FADEC 1(2).
Subtask 36-21-49-865-052-A ** ON A/C NOT FOR ALL
C. Open, safety and tag this(these) circuit breaker(s):
PANELDESIGNATIONFINLOCATION
** ON A/C NOT FOR ALL
49VUAIR BLEED/ENG 1/CTL3HA1D12
49VUAIR BLEED/ENG 1/MONG2HA1D11
122VUAIR BLEED/ENG 2/CTL3HA2Z23
122VUAIR BLEED/ENG 2/MONG2HA2Z22
Subtask 36-21-49-010-051-A ** ON A/C NOT FOR ALL
D. Get Access
   (1) Open the fan cowls (Ref. AMM TASK 71-13-00-010-010):
     (a) FOR [1000EM1] (ENGINE-1)
437AL 438AR
     (b) FOR [1000EM2] (ENGINE-2)
447AL 448AR
   (2) Put the ACCESS PLATFORM 2M (6 FT) - ADJUSTABLE in to position below the engine.
Subtask 36-21-49-040-055-A ** ON A/C NOT FOR ALL
E. Deactivate the Thrust Reverser
WARNING: MAKE SURE THAT THE THRUST REVERSER HYDRAULIC CONTROL UNIT (HCU) IS DEACTIVATED BEFORE YOU DO WORK ON OR AROUND THE THRUST REVERSER. IF THE HCU IS NOT DEACTIVATED, THERE IS A RISK OF UNWANTED THRUST REVERSER OPERATION WHICH CAN CAUSE INJURY TO PERSONS AND/OR DAMAGE TO EQUIPMENT.
   (1) Deactivate the thrust reverser Hydraulic Control Unit (HCU) (Ref. AMM TASK 78-30-00-040-012).
Subtask 36-21-49-010-059-A ** ON A/C NOT FOR ALL
F. Open the thrust reverser halves (Ref. AMM TASK 78-32-00-010-010):
   (1) FOR [1000EM1] (ENGINE-1)
451AL 452AR
   (2) FOR [1000EM2] (ENGINE-2)
461AL 462AR
Subtask 36-21-49-110-051-C ** ON A/C NOT FOR ALL
G. Clean the Pressure Indicating Tubes
   (1) Clean the pressure indicating tubes (3), (4), (5), (6) and the pressure indicating hoses (1) and (2).
     (a) Make a clean Textile-Lint free Cotton - (Material No.14SBA1) moist with cleaning fluid (Material No.V01-002) . Use the cloth to clean the pressure indicating tubes and hoses.
     (b) Dry the pressure indicating tubes and hoses with a Textile-Lint free Cotton - (Material No.14SBA1) .
4. Procedure
Subtask 36-21-49-210-053-C ** ON A/C NOT FOR ALL
A. Inspection of the Pressure Indicating Tubes
   (1) Examine the pressure indicating tubes and hoses (1), (2), (3), (4), (5) and (6) for security of attachment. Use the LIGHT SOURCE - INSPECTION and the MIRROR - INSPECTION.
     (a) If the pressure indicating tubes and hoses are loose, examine these items for damage, wear and loss of torque:
  • The attachment nuts and bolts
  • The attachment clips
  • The wire that safeties the connections
  • The union nuts and the tube end fittings.
     (b) If some of the above items have damage or wear, reject them.
   (2) Examine the pressure indicating tubes and hoses (1), (2), (3), (4), (5) and (6) connections for signs of leaks. No leaks are permitted. Use the LIGHT SOURCE - INSPECTION and the MIRROR - INSPECTION.
     (a) If signs of leaks are found:
  • Examine the union nuts for loss of torque.
  • If there is a loss of torque, examine the union nuts and the tube end fittings for damage and wear.
   (3) Examine the general condition of the pressure indicating tubes and hoses (1), (2), (3), (4), (5) and (6). Use the LIGHT SOURCE - INSPECTION and the MIRROR - INSPECTION.
     (a) Examine the pressure indicating tubes and hoses for cracks.
  • If a tube or hose has cracks, reject it.
     (b) Examine the pressure indicating tubes for dents and damage.
  • If a tube has dents or damage, reject it.
     (c) Examine the pressure indicating hoses for damage.
  • If a hose has damage, reject it.
5. Close-up
Subtask 36-21-49-865-053-A ** ON A/C NOT FOR ALL
A. Remove the safety clip(s) and the tag(s) and close this(these) circuit breaker(s):
PANELDESIGNATIONFINLOCATION
** ON A/C NOT FOR ALL
49VUAIR BLEED/ENG 1/CTL3HA1D12
49VUAIR BLEED/ENG 1/MONG2HA1D11
122VUAIR BLEED/ENG 2/CTL3HA2Z23
122VUAIR BLEED/ENG 2/MONG2HA2Z22
Subtask 36-21-49-410-057-A ** ON A/C NOT FOR ALL
B. Close Access
   (1) Make sure that the work area is clean and clear of tools and other items.
   (2) Close the thrust reverser halves (Ref. AMM TASK 78-32-00-410-010):
     (a) FOR [1000EM1] (ENGINE-1)
451AL 452AR
     (b) FOR [1000EM2] (ENGINE-2)
461AL 462AR
Subtask 36-21-49-440-053-A ** ON A/C NOT FOR ALL
C. Activate the thrust reverser HCU (Ref. AMM TASK 78-30-00-440-012).
Subtask 36-21-49-410-051-A ** ON A/C NOT FOR ALL
D. Close Access
   (1) Close the fan cowls (Ref. AMM TASK 71-13-00-410-010):
     (a) FOR [1000EM1] (ENGINE-1)
437AL 438AR
     (b) FOR [1000EM2] (ENGINE-2)
447AL 448AR
   (2) Remove the WARNING NOTICE(S).
   (3) Remove the access platform(s).
Subtask 36-21-49-862-053-A ** ON A/C NOT FOR ALL
E. De-energize the aircraft electrical circuits
(Ref. AMM TASK 24-41-00-862-002).
[Rev.10 from 2021] 2026.04.01 01:16:20 UTC
"Aviabrain" 2025