DOC AIRBUS | AMM A320FRemoval of the Power Control Unit of the Flap System
TASK 27-54-51-000-001-A
Removal of the Power Control Unit of the Flap System
Self explanatory
2. Job Set-up Information
A. Fixtures, Tools, Test and Support Equipment
B. Referenced Information
3. Job Set-up
Subtask 27-54-51-860-051-A
Subtask 27-54-51-020-050-A
[Rev.10 from 2021]
2026.04.01 07:00:13 UTC
Removal of the Power Control Unit of the Flap System
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:
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.
FIN: 6201CM
1. Reason for the JobSelf explanatory
2. Job Set-up Information
A. Fixtures, Tools, Test and Support Equipment
| REFERENCE | QTY | DESIGNATION |
|---|---|---|
| No specific | 2 | ACCESS PLATFORM 3M (10 FT) |
| No specific | AR | CAP - BLANKING |
| No specific | 1 | CONTAINER 5 L (1.32 USGAL) |
| No specific | AR | PLUG - BLANKING |
| No specific | AR | SAFETY CLIP - CIRCUIT BREAKER |
| No specific | 1 | WARNING NOTICE(S) |
| 98D27504030001 | 2 | LOCK-TORQUE SHAFT (FLAPS AND SLATS) WITH CLAMP-PIVOT |
| 98D27803000000 | 1 | LOCKING TOOL-FLAP SLAT LEVER,INT. POSITION |
| REFERENCE | DESIGNATION |
|---|---|
| TASK 27-00-00-480-002-A | Installation of the Flap/Slat Control-Lever Locking Tool (98D27803000000) |
| TASK 27-50-00-400-003-A | Installation of the Lock-Torque Shaft - Flaps and Slats (98D27504030001) |
| TASK 27-50-00-480-802-A | Installation/Removal of the Check Pin at Track 1 |
| TASK 27-50-00-860-801-A | Readout of the Flap Position Pickoff Unit (PPU) Data |
| TASK 27-50-00-866-009-A | Retraction of the Flaps on the Ground |
| TASK 27-50-00-866-009-A-01 | Retraction of the Flaps/Slats on the Ground |
| TASK 27-54-00-820-001-A | Adjustment of the Flap Drive System |
| TASK 29-00-00-864-001-A | Put the Related Hydraulic System in the Depressurized Configuration before Maintenance Action |
| TASK 29-14-00-614-001-A | Depressurization of the Hydraulic Reservoirs |
| TASK 32-12-00-010-001-A | Open the Main Gear Doors for Access |
Power Control Unit of the Flap SystemSubtask 27-54-51-860-051-A
A. Retraction of the Flaps
(1) Retract the flaps to the 0 degree position (Ref. AMM TASK 27-50-00-866-009).
(2) Install the 98D27803000000 LOCKING TOOL-FLAP SLAT LEVER,INT. POSITION (Ref. AMM TASK 27-00-00-480-002) on the slat/flap control lever.
Subtask 27-54-51-740-050-A (1) Retract the flaps to the 0 degree position (Ref. AMM TASK 27-50-00-866-009).
(2) Install the 98D27803000000 LOCKING TOOL-FLAP SLAT LEVER,INT. POSITION (Ref. AMM TASK 27-00-00-480-002) on the slat/flap control lever.
B. Readout of the Position Pickoff Units (PPUs) on the Centralized Fault Display System (CFDS)
(1) Do the readout of the PPU data (Ref. AMM TASK 27-50-00-860-801).
Subtask 27-54-51-865-050-A (1) Do the readout of the PPU data (Ref. AMM TASK 27-50-00-860-801).
NOTE: Airbus recommends to do the readout and recording of the PPU angles before the maintenance action.
In case of a loss of the torque shaft fixture you can put the flap transmission system back to the initial condition.
In case of a loss of the torque shaft fixture you can put the flap transmission system back to the initial condition.
C. Open, safety and tag this(these) circuit breaker(s):
Subtask 27-54-51-010-050-A | PANEL | DESIGNATION | FIN | LOCATION |
|---|---|---|---|
| ** ON A/C NOT FOR ALL | |||
| 49VU | FLIGHT CONTROLS/FLP/CTL AND MONG/SYS1 | 6CV | B07 |
| ** ON A/C NOT FOR ALL | |||
| 49VU | FLIGHT CONTROLS/FLP/CTL AND MONG/SYS1 | 6CV | B02 |
| ** ON A/C ALL | |||
| 121VU | FLIGHT CONTROLS/FLP/CTL AND/MONG/SYS2 | 8CV | Q21 |
D. Get Access
(1) Open the main doors of the main gear (Ref. AMM TASK 32-12-00-010-001).
(2) Put the ACCESS PLATFORM 3M (10 FT) in position at the main gear main door opening.
Subtask 27-54-51-860-050-B (1) Open the main doors of the main gear (Ref. AMM TASK 32-12-00-010-001).
(2) Put the ACCESS PLATFORM 3M (10 FT) in position at the main gear main door opening.
E. Aircraft Maintenance Configuration
(1) Make sure that the Green and the Yellow hydraulic systems are depressurized and put them in the maintenance configuration. (Ref. AMM TASK 29-00-00-864-001).
(2) Depressurize the reservoirs of the Green and Yellow hydraulic systems (Ref. AMM TASK 29-14-00-614-001).
(3) Put the WARNING NOTICE(S) in position to tell persons not to pressurize the hydraulic systems.
(4) Put the ACCESS PLATFORM 3M (10 FT) in position at the main gear main door opening.
(5) Install the check pins at the left and right flap tracks 1 (Ref. AMM TASK 27-50-00-480-802).
(a) If you cannot install the check pins easily, do the adjustment of the L/H (R/H) flap drive system (Ref. AMM TASK 27-54-00-820-001).
(6) Install the 98D27504030001 LOCK-TORQUE SHAFT (FLAPS AND SLATS) WITH CLAMP-PIVOT at the left torque shaft (6206CM) to lock the flap transmission outboard of the left angle gearbox (6203CM) (Ref. AMM TASK 27-50-00-400-003).
(7) Install the 98D27504030001 LOCK-TORQUE SHAFT (FLAPS AND SLATS) WITH CLAMP-PIVOT at the right torque shaft (6256CM) to lock the flap transmission outboard of the right angle gearbox (6253CM) (Ref. AMM TASK 27-50-00-400-003).
(8) Put a CONTAINER 5 L (1.32 USGAL) in position below the Power Control Unit (PCU) (1).
4. Procedure(1) Make sure that the Green and the Yellow hydraulic systems are depressurized and put them in the maintenance configuration. (Ref. AMM TASK 29-00-00-864-001).
(2) Depressurize the reservoirs of the Green and Yellow hydraulic systems (Ref. AMM TASK 29-14-00-614-001).
(3) Put the WARNING NOTICE(S) in position to tell persons not to pressurize the hydraulic systems.
(4) Put the ACCESS PLATFORM 3M (10 FT) in position at the main gear main door opening.
(5) Install the check pins at the left and right flap tracks 1 (Ref. AMM TASK 27-50-00-480-802).
(a) If you cannot install the check pins easily, do the adjustment of the L/H (R/H) flap drive system (Ref. AMM TASK 27-54-00-820-001).
(6) Install the 98D27504030001 LOCK-TORQUE SHAFT (FLAPS AND SLATS) WITH CLAMP-PIVOT at the left torque shaft (6206CM) to lock the flap transmission outboard of the left angle gearbox (6203CM) (Ref. AMM TASK 27-50-00-400-003).
(7) Install the 98D27504030001 LOCK-TORQUE SHAFT (FLAPS AND SLATS) WITH CLAMP-PIVOT at the right torque shaft (6256CM) to lock the flap transmission outboard of the right angle gearbox (6253CM) (Ref. AMM TASK 27-50-00-400-003).
(8) Put a CONTAINER 5 L (1.32 USGAL) in position below the Power Control Unit (PCU) (1).
Subtask 27-54-51-020-050-A
A. Removal of the Power Control Unit
(a) Remove the nuts (11) and the bolts (12) which connect the torque shaft (32) to the input universal joint (35) of the PCU (1).
(b) Disconnect the torque shaft (32) from the input universal joint (35).
(c) Remove the input universal joint (35) from the PCU (1).
(2) Disconnect the left torque shaft 6202CM (13) as follows:
(a) Remove the nuts (11) and the bolts (12) which connect the torque shaft (13) to the input universal joint (10) of the PCU (1).
(b) Disconnect the torque shaft (13) from the input universal joint (10).
(c) Remove the input universal joint (10) from the PCU (1).
(3) Prepare the PCU (1) for removal as follows:
(a) Disconnect the hydraulic lines (52).
(b) Disconnect the case drain lines (59) and (60).
(c) Remove the tie wraps (46) and disconnect the seal drain lines (45).
(d) Install the CAP - BLANKING or the PLUG - BLANKING on the open line (52) ends and on the PCU (1).
(e) Disconnect the electrical connectors 27CV-A, 27CV-B, 23CV-A, 24CV-A, 3CN-B and 3CN-A.
(f) Put the CAP-BLANKING on each disconnected electrical connector and receptacle.
(g) Disconnect the electrical leads from the clamps which connect them to the PCU (1).
(h) Remove the cotter pin (8), the nut (9) and the washer (7) from the bolt (5) which connects the PCU (1) to the attachment rod assembly (3).
(i) Remove the cotter pin (8), the nut (9) and the washer (7) from the bolt (5) which connects the PCU (1) to the adjustable rod assembly (4).
(j) Cut, remove and discard the lockwire from the nut (17).
(k) Remove the nut (17), the washer (18) and the bolt (31).
(l) Remove the nut (19) and the washer (20) from the attachment bolt (30).
(m) Remove the screw (42), the washer (41) and the bonding jumper (40).
(4) Remove the PCU (1) as follows:
(b) Remove the bolts (5) and the bushes (6) from the attachment rod assembly and from the adjustable rod assembly.
(c) Remove the attachment bolt (30) and the bush (21).
(d) Remove the PCU (1).
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) Disconnect the right torque shaft 6252CM (32) as follows: (a) Remove the nuts (11) and the bolts (12) which connect the torque shaft (32) to the input universal joint (35) of the PCU (1).
(b) Disconnect the torque shaft (32) from the input universal joint (35).
(c) Remove the input universal joint (35) from the PCU (1).
(2) Disconnect the left torque shaft 6202CM (13) as follows:
(a) Remove the nuts (11) and the bolts (12) which connect the torque shaft (13) to the input universal joint (10) of the PCU (1).
(b) Disconnect the torque shaft (13) from the input universal joint (10).
(c) Remove the input universal joint (10) from the PCU (1).
(3) Prepare the PCU (1) for removal as follows:
(a) Disconnect the hydraulic lines (52).
(b) Disconnect the case drain lines (59) and (60).
(c) Remove the tie wraps (46) and disconnect the seal drain lines (45).
(d) Install the CAP - BLANKING or the PLUG - BLANKING on the open line (52) ends and on the PCU (1).
(e) Disconnect the electrical connectors 27CV-A, 27CV-B, 23CV-A, 24CV-A, 3CN-B and 3CN-A.
(f) Put the CAP-BLANKING on each disconnected electrical connector and receptacle.
(g) Disconnect the electrical leads from the clamps which connect them to the PCU (1).
(h) Remove the cotter pin (8), the nut (9) and the washer (7) from the bolt (5) which connects the PCU (1) to the attachment rod assembly (3).
(i) Remove the cotter pin (8), the nut (9) and the washer (7) from the bolt (5) which connects the PCU (1) to the adjustable rod assembly (4).
(j) Cut, remove and discard the lockwire from the nut (17).
(k) Remove the nut (17), the washer (18) and the bolt (31).
(l) Remove the nut (19) and the washer (20) from the attachment bolt (30).
(m) Remove the screw (42), the washer (41) and the bonding jumper (40).
(4) Remove the PCU (1) as follows:
NOTE: The PCU weighs approximately 20 kg (44.0924 lb).
(a) Hold the PCU (1) so that it can not fall. (b) Remove the bolts (5) and the bushes (6) from the attachment rod assembly and from the adjustable rod assembly.
(c) Remove the attachment bolt (30) and the bush (21).
(d) Remove the PCU (1).