W DOC AIRBUS | AMM A320F

Removal of the Convoluted Bleed Hose with Restrictor

TASK 29-14-13-000-803-A
Removal of the Convoluted Bleed Hose with Restrictor

WARNING: OBEY THE HYDRAULIC SAFETY PROCEDURES.
WARNING: MAKE SURE THAT THE PNEUMATIC SYSTEM IS DEPRESSURIZED BEFORE YOU START WORK. PRESSURIZED AIR CAN CAUSE INJURY TO PERSONNEL.
WARNING: DO NOT TOUCH THE HYDRAULIC SYSTEM COMPONENTS FOR A SHORT TIME AFTER THE ENGINE IS SHUTDOWN. THE ENGINE COMPONENTS STAY HOT FOR SOME TIME AND CAN CAUSE INJURY.
ZONE: 453
FIN: 1390GM
1. Reason for the Job
This procedure is applicable only for the left pylon.
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
PLUG - BLANKING
No specific
AR
WARNING NOTICE(S)
No specific
2
WRENCH - STANDARD
 B. Work Zones and Access Panels
ZONE/ACCESS
ZONE DESCRIPTION
453
HOT SECTION
195BB, 197CB, 197EB, 198CB
FOR [4020KM1] (POWER PLANT-DEMOUNTABLE, ENGINE 1)
437AL, 438AR, 451AL, 452AR
 C. Referenced Information
REFERENCE
DESIGNATION
TASK 29-10-00-864-001-A
Depressurize the Green Hydraulic System
TASK 29-10-00-864-002-A
Depressurize the Yellow Hydraulic System
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 71-13-00-010-803-A
Opening of the Fan Cowl Doors
TASK 78-30-00-040-807-A
Deactivation of the Thrust Reverser System for Nacelle Maintenance (ICU)
TASK 78-36-00-010-806-A
Opening of the Thrust Reverser Cowl Doors
F Convoluted Bleed Hose with Restrictor
3. Job Set-up
Subtask 29-14-13-860-054-A
A. Aircraft Maintenance Configuration
   (1) Make sure that the aircraft hydraulic systems are depressurized (Ref. AMM TASK 29-10-00-864-001) (Ref. AMM TASK 29-10-00-864-002) (Ref. AMM TASK 29-10-00-864-003).
   (2) Depressurize the hydraulic reservoirs (Ref. AMM TASK 29-14-00-614-001).
   (3) Open access doors 197CB, 197EB and 198CB:
     (a) Put WARNING NOTICE(S) in position to tell persons not to pressurize the Green, Blue and Yellow hydraulic systems:
  • On the ground service panel of the Green hydraulic system.
  • On the ground service panel of the Blue hydraulic system.
  • On the ground service panel of the Yellow hydraulic system.
   (4) Open access door 195BB:
     (a) Put WARNING NOTICE(S) in position to tell persons not to pressurize the hydraulic reservoirs.
Subtask 29-14-13-941-055-A
B. Safety Precautions
   (1) Make sure that the engine 1(2) shutdown occurred not less than five minutes before you do this procedure.
   (2) On AIR COND panel 30VU:
  • Make sure that the APU BLEED pushbutton switch is released (ON legend off).
  • Make sure that the ENG 1(2) BLEED pushbutton switch is released (OFF legend on).
  • Put a WARNING NOTICE(S) in position to tell persons not to operate the pneumatic system.
   (3) On the HYD section of panel 40VU:
  • Put WARNING NOTICE(S) in position to tell persons not to pressurize the Green, Blue and Yellow hydraulic systems.
   (4) On the ENG section of 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) in position to tell persons not to energize FADEC 1(2).
   (5) On the center pedestal, on ENG panel 115VU:
  • Make sure that the ENG/MODE selector switch is in the NORM position.
  • Make sure that the ENG/MASTER 1(2) control switch was in the OFF position not less than five minutes before you do this procedure.
  • Put WARNING NOTICE(S) in position to tell persons not to operate the ENG/MODE selector switch and the ENG/MASTER 1(2) control switch.
   (6) On the HP ground connectors:
  • Put a WARNING NOTICE(S) in position to tell persons not to pressurize the pneumatic system.
Subtask 29-14-13-010-055-A
C. Get Access
   (1) Open the fan cowl doors (Ref. AMM TASK 71-13-00-010-803):
     (a) FOR [4020KM1] (POWER PLANT-DEMOUNTABLE, ENGINE 1)
437AL 438AR
Subtask 29-14-13-040-052-A
D. Deactivation of the Thrust Reverser for Maintenance
WARNING: YOU MUST DEACTIVATE THE THRUST REVERSER BEFORE YOU DO WORK ON OR AROUND IT. IF YOU DO NOT, THE THRUST REVERSER CAN OPERATE ACCIDENTALLY AND CAUSE AN INJURY AND/OR DAMAGE.
   (1) Do the deactivation of the thrust reverser system for maintenance (Ref. AMM TASK 78-30-00-040-807).
Subtask 29-14-13-010-056-A
E. Get Access
   (1) Open the thrust-reverser cowl-doors (Ref. AMM TASK 78-36-00-010-806):
     (a) FOR [4020KM1] (POWER PLANT-DEMOUNTABLE, ENGINE 1)
451AL, 452AR
   (2) Put an ACCESS PLATFORM 2M (6 FT) - ADJUSTABLE in position at the pylon.
4. Procedure
Subtask 29-14-13-020-053-A
A. Removal of the Convoluted Bleed Hose with Restrictor
CAUTION: USE TWO WRENCHES TO REMOVE OR INSTALL THE TUBE COUPLING NUTS:
  • ONE WRENCH TO HOLD THE UNION, AND
  • ONE TO LOOSEN OR TIGHTEN THE COUPLING NUT.
THIS PREVENTS DAMAGE TO THE PARTS.
   (1) Remove the nut (4), washer (5) and bolt (6).
   (2) Hold the union of the pipe (1) with a WRENCH - STANDARD and disconnect the convoluted bleed hose (2) from the pipe (1).
   (3) Hold the union of the duct (3) with a WRENCH - STANDARD and disconnect the convoluted bleed hose (2).
   (4) Remove the convoluted bleed hose (2).
   (5) Put PLUG - BLANKING on each end of the convoluted bleed hose (2) and on the unions of the pipe (1) and the duct (3).
[Rev.10 from 2021] 2026.04.01 00:24:18 UTC
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