W DOC AIRBUS | AMM A320F

Reactivation of the Blue Power Accumulator

TASK 29-10-00-440-005-A
Reactivation of the Blue Power Accumulator

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.
FIN: 2070GM
1. Reason for the Job
MMEL 29-10-04A
HYDRAULIC SYSTEM ACCUMULATOR
2. Job Set-up Information
 A. Fixtures, Tools, Test and Support Equipment
REFERENCE
QTY
DESIGNATION
No specific
AR
CONTAINER 5 L (1.32 USGAL)
No specific
AR
SAFETY CLIP - CIRCUIT BREAKER
No specific
1
WARNING NOTICE(S)
No specific
Torque wrench: range to between 8.3 and 7.5 m.daN (61.21 and 55.31 lbf.ft ) T
 B. Consumable Materials
REFERENCE
DESIGNATION
(Material No.02ABA1)
Phosphate Ester Hydraulic Fluid-General Power - -
(Material No.03LDA1)
Grease-Hydraulic Systems - -
 C. Work Zones and Access Panels
ZONE/ACCESS
ZONE DESCRIPTION
195BB
 D. Referenced Information
REFERENCE
DESIGNATION
TASK 12-12-29-611-001-A
Fill the Hydraulic Fluid Reservoir with a Hand Pump
TASK 12-14-29-614-001-A
Fill the Hydraulic Power Accumulators with Nitrogen
TASK 29-00-00-864-001-A
Put the Related Hydraulic System in the Depressurized Configuration before Maintenance Action
TASK 29-00-00-870-009-A
Bleeding Procedure of the Blue Hydraulic System Downstream of the Blue E-Pump
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 29-12-42-000-001-A
Removal of the Blue Power Accumulator
TASK 29-12-42-400-001-A
Installation of the Blue Power Accumulator
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)
F Blue Power Accumulator (2070GM) ** ON A/C NOT FOR ALL
F Blue Power Accumulator (2070GM) ** ON A/C NOT FOR ALL
3. Job Set-up
Subtask 29-10-00-865-089-A
A. Open, safety and tag this(these) circuit breaker(s):
PANELDESIGNATIONFINLOCATION
** ON A/C ALL
49VUHYD/HYD PWR/B WARN/& CTL2702GJC12
123VUB HYD/ELEC PUMP2701GJAB09
Subtask 29-10-00-860-104-A ** ON A/C NOT FOR ALL
B. Aircraft Maintenance Configuration
WARNING: OBEY THE HYDRAULIC SAFETY PROCEDURES.
   (1) Obey the hydraulic safety procedures (Ref. AMM TASK 29-00-00-910-002).
   (2) 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.
   (3) Make sure that the Blue hydraulic system is depressurized and put it in the maintenance configuration.
(Ref. AMM TASK 29-00-00-864-001).
   (4) Depressurize the reservoir of the Blue hydraulic system (Ref. AMM TASK 29-14-00-614-001).
   (5) Put a CONTAINER 5 L (1.32 USGAL) below the power accumulator to collect the unwanted hydraulic fluid.
   (6) Make sure that the defective power accumulator is replaced (Ref. AMM TASK 29-12-42-000-001) and (Ref. AMM TASK 29-12-42-400-001).
Subtask 29-10-00-860-104-B ** ON A/C NOT FOR ALL
B. Aircraft Maintenance Configuration
WARNING: OBEY THE HYDRAULIC SAFETY PROCEDURES.
   (1) Obey the hydraulic safety procedures (Ref. AMM TASK 29-00-00-910-002).
   (2) 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.
   (3) Make sure that the Blue hydraulic system is depressurized and put it in the maintenance configuration (Ref. AMM TASK 29-00-00-864-001).
   (4) Depressurize the reservoir of the Blue hydraulic system (Ref. AMM TASK 29-14-00-614-001).
   (5) Put a CONTAINER 5 L (1.32 USGAL) below the power accumulator to collect the unwanted hydraulic fluid.
   (6) Put a CONTAINER 5 L (1.32 USGAL) below the HP manifold to collect the unwanted hydraulic fluid.
   (7) Make sure that the defective power accumulator is replaced (Ref. AMM TASK 29-12-42-000-001) and (Ref. AMM TASK 29-12-42-400-001).
Subtask 29-10-00-010-079-A
C. Open the access door 195BB.
4. Procedure
Subtask 29-10-00-020-059-A ** ON A/C NOT FOR ALL
A. Remove the Blanking Caps
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.
   (1) If installed remove the blanking cap from the bulkhead union (12) of the power accumulator (13).
   (2) Remove the blanking cap from the union (2) of the tee connector (3) installed at the ground leakage measurement manifold (4).
Subtask 29-10-00-020-059-B ** ON A/C NOT FOR ALL
A. Remove the Blanking Caps
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.
   (1) If installed remove the blanking cap from the bulkhead union (11) of the power accumulator (12).
   (2) Remove the blanking cap from the union (15) of the tee connector (1) installed at the HP manifold (3).
Subtask 29-10-00-420-056-A ** ON A/C NOT FOR ALL
B. Installation of the Hydraulic Pipe
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.
   (1) Clean the component interfaces and the adjacent area.
   (2) Do an inspection of the component interfaces and the adjacent area.
   (3) Remove the blanking caps from the line end fittings (1) and (11) of the pipe (10).
WARNING: OBEY THE HYDRAULIC SAFETY PROCEDURES.
   (4) Apply the Phosphate Ester Hydraulic Fluid-General Power - - (Material No.02ABA1) or Grease-Hydraulic Systems - - (Material No.03LDA1) to the threads of the union (2) and the bulkhead union (12) and the rear of the sleeve collar of the line end fittings (1) and (11).
   (5) Install the pipe (10) loosely on the bulkhead union (12) of the power accumulator (13) and on the union (2) of the tee connector (3) installed at the ground leakage measurement manifold (4).
   (6) To attach the pipe (10) to the bracket (5) install:
  • the bolt (9),
  • the spacer (6),
  • the clamp (7),
  • the nut (8).
   (7) TORQUE the line end fittings (1) and (11) to between 8.3 and 7.5 m.daN (61.21 and 55.31 lbf.ft ) T.
Subtask 29-10-00-420-056-B ** ON A/C NOT FOR ALL
B. Installation of the Hydraulic Pipe
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.
   (1) Clean the component interfaces and the adjacent area.
   (2) Do an inspection of the component interfaces and the adjacent area.
   (3) Remove the blanking caps from the line end fittings (2) and (10) of the pipe (9).
WARNING: OBEY THE HYDRAULIC SAFETY PROCEDURES.
   (4) Apply the Phosphate Ester Hydraulic Fluid-General Power - - (Material No.02ABA1) or Grease-Hydraulic Systems - - (Material No.03LDA1) to the threads of the union (15) and the bulkhead union (11) and the rear of the sleeve collar of the line end fittings (2) and (10).
   (5) Install the pipe (9) loosely on the bulkhead union (11) of the power accumulator (12) and on the union (15) of the tee connector (1) installed at the HP manifold (3).
   (6) To attach the pipe (9) to the bracket (4) install:
  • the spacer (5),
  • the clamp (6),
  • the washer (7),
  • the bolt (8).
   (7) TORQUE the line end fittings (2) and (10) to between 8.3 and 7.5 m.daN (61.21 and 55.31 lbf.ft ) T.
Subtask 29-10-00-420-056-C ** ON A/C NOT FOR ALL
B. Installation of the Hydraulic Pipe
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.
   (1) Clean the component interfaces and the adjacent area.
   (2) Do an inspection of the component interfaces and the adjacent area.
   (3) Remove the blanking caps from the line end fittings (2) and (10) of the pipe (9).
WARNING: OBEY THE HYDRAULIC SAFETY PROCEDURES.
   (4) Apply the Phosphate Ester Hydraulic Fluid-General Power - - (Material No.02ABA1) or Grease-Hydraulic Systems - - (Material No.03LDA1) to the threads of the union (15) and the bulkhead union (11) and the rear of the sleeve collar of the line end fittings (2) and (10).
   (5) Install the pipe (9) loosely on the bulkhead union (11) of the power accumulator (12) and on the union (15) of the tee connector (1) installed at the HP manifold (3).
   (6) To attach the pipe (9) to the bracket (4) install:
  • the spacer (5),
  • the clamp (6),
  • the washer (7),
  • the bolt (8).
   (7) TORQUE the line end fittings (2) and (10) to between 8.3 and 7.5 m.daN (61.21 and 55.31 lbf.ft ) T.
Subtask 29-10-00-865-090-A
C. Remove the safety clip(s) and the tag(s) and close this(these) circuit breaker(s):
PANELDESIGNATIONFINLOCATION
** ON A/C ALL
49VUHYD/HYD PWR/B WARN/& CTL2702GJC12
123VUB HYD/ELEC PUMP2701GJAB09
Subtask 29-10-00-790-056-A ** ON A/C NOT FOR ALL
D. Test of the Power Accumulator
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.
   (1) Fill the power accumulator (13) with nitrogen (Ref. AMM TASK 12-14-29-614-001).
   (2) Remove the WARNING NOTICE(S) from the ground service panel of the Blue hydraulic system and from the cockpit.
   (3) Pressurize the hydraulic reservoir of the Blue hydraulic system (Ref. AMM TASK 29-14-00-614-002).
   (4) Make sure that the fluid level in the reservoir of the Blue hydraulic system is correct. Add fluid as necessary (Ref. AMM TASK 12-12-29-611-001).
   (5) Pressurize the Blue hydraulic system (Ref. AMM TASK 29-10-00-863-003).
   (6) After 5 minutes, examine the connections of the power accumulator (13), the pipe (10) and the ground leakage measurement manifold (4). Make sure that there are no hydraulic fluid or nitrogen leaks.
   (7) Depressurize the Blue hydraulic system
(Ref. AMM TASK 29-10-00-864-003).
   (8) Do the bleeding procedure of the Blue hydraulic system downstream of the Blue E-pump (Ref. AMM TASK 29-00-00-870-009).
NOTE: When you do the bleeding procedure, you remove the nitrogen which came into the hydraulic system from the defective accumulator.
Subtask 29-10-00-790-056-B ** ON A/C NOT FOR ALL
D. Test of the Power Accumulator
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.
   (1) Fill the power accumulator (12) with nitrogen (Ref. AMM TASK 12-14-29-614-001).
   (2) Remove the WARNING NOTICE(S) from the ground service panel of the Blue hydraulic system and from the cockpit.
   (3) Pressurize the hydraulic reservoir of the Blue hydraulic system (Ref. AMM TASK 29-14-00-614-002).
   (4) Make sure that the fluid level in the reservoir of the Blue hydraulic system is correct. Add fluid as necessary (Ref. AMM TASK 12-12-29-611-001).
   (5) Pressurize the Blue hydraulic system (Ref. AMM TASK 29-10-00-863-003).
   (6) After 5 minutes, examine the connections of the power accumulator (12), the pipe (9) and the HP manifold (3). Make sure that there are no hydraulic fluid or nitrogen leaks.
   (7) Depressurize the Blue hydraulic system
(Ref. AMM TASK 29-10-00-864-003).
   (8) Do the bleeding procedure of the Blue hydraulic system downstream of the Blue E-pump (Ref. AMM TASK 29-00-00-870-009).
NOTE: When you do the bleeding procedure, you remove the nitrogen which came into the hydraulic system from the defective accumulator.
5. Close-up
Subtask 29-10-00-410-079-A ** ON A/C NOT FOR ALL
A. Put the aircraft back to the serviceable condition.
   (1) Remove the CONTAINER 5 L (1.32 USGAL) from below the power accumulator.
   (2) Make sure that the work area is clean and clear of tools and other items.
   (3) Close the access door 195BB.
   (4) Remove the entry from the log book.
Subtask 29-10-00-410-079-B ** ON A/C NOT FOR ALL
A. Put the aircraft back to the serviceable condition.
   (1) Remove the CONTAINER 5 L (1.32 USGAL) from below the power accumulator.
   (2) Remove the CONTAINER 5 L (1.32 USGAL) from below the HP manifold.
   (3) Make sure that the work area is clean and clear of tools and other items.
   (4) Close the access door 195BB.
   (5) Remove the entry from the log book.
[Rev.10 from 2021] 2026.04.01 00:14:02 UTC
"Aviabrain" 2025