W DOC AIRBUS | TSM A320F

Slat System Jam

TASK 27-81-00-810-810-A
Slat System Jam

1. Possible Causes
  • SLAT-PCU [6001CM]
  • SLAT ACTUATOR TYPE A [6013CM]
  • SLAT ACTUATOR TYPE A [6015CM]
  • SLAT ACTUATOR TYPE A [6063CM]
  • SLAT ACTUATOR TYPE A [6065CM]
  • SLAT ACTUATOR TYPE B [6027CM]
  • SLAT ACTUATOR TYPE B [6029CM]
  • SLAT ACTUATOR TYPE B [6035CM]
  • SLAT ACTUATOR TYPE B [6039CM]
  • SLAT ACTUATOR TYPE B [6045CM]
  • SLAT ACTUATOR TYPE B [6077CM]
  • SLAT ACTUATOR TYPE B [6079CM]
  • SLAT ACTUATOR TYPE B [6085CM]
  • SLAT ACTUATOR TYPE B [6089CM]
  • SLAT ACTUATOR TYPE B [6095CM]
  • SLAT ACTUATOR TYPE B [6033CM]
  • SLAT ACTUATOR TYPE B [6037CM]
  • SLAT ACTUATOR TYPE B [6041CM]
  • SLAT ACTUATOR TYPE B [6083CM]
  • SLAT ACTUATOR TYPE B [6087CM]
  • SLAT ACTUATOR TYPE B [6091CM]
  • WING TIP BRAKE [35CV]
  • WING TIP BRAKE [36CV]
  • PCU Hydraulic Motor
  • Transmission Assembly
2. Job Set-up Information
 A. Referenced Information
REFERENCE
DESIGNATION
AMM 12-22-27-640-006
Lubricate all Track Rollers and Pinions
AMM 27-54-49-000-001
Removal of the Flap Track 1 Actuator
AMM 27-54-49-400-001
Installation of the Flap Track 1 Actuator
AMM 27-80-00-866-004
Extending the Slats on the Ground
AMM 27-80-00-866-005
Retracting the Slats on the Ground
AMM 27-80-00-866-006
Reset of the Torque Limiters of the Slat System on the Ground
AMM 27-80-00-866-007
Manual Extension of the Slats
AMM 27-81-51-000-001
Removal of the Slat Wing-Tip Brake
AMM 27-81-51-400-001
Installation of the Slat Wing-Tip Brake
AMM 27-84-00-200-001
Detailed Visual Inspection of the Slat Transmission System
AMM 27-84-00-210-001
Detailed Visual Inspection of the Slat Track Rollers, the Pinions and the Curved Rack Gears (As Far As Visible)
AMM 27-84-00-710-001
Operational Test of the Slat System
AMM 27-84-48-000-001
Removal of the Type A Actuators
AMM 27-84-48-400-001
Installation of the Type A Actuators
AMM 27-84-49-000-001
Removal of the Type B Actuators
AMM 27-84-49-000-002
Removal of the Type B Actuators
AMM 27-84-49-400-001
Installation of the Type B Actuators
AMM 27-84-49-400-002
Installation of the Type B Actuators
AMM 27-84-51-000-001
Removal of the Power Control Unit of the Slat System
AMM 27-84-51-400-001
Installation of the Power Control Unit of the Slat System
AMM 27-84-54-000-002
Removal of the Hydraulic Motor of the Slat Power Control Unit without the Pressure-Off Brake and the Valve Block Assembly
AMM 27-84-54-400-002
Installation of the Hydraulic Motor of the Slat Power Control Unit without the Pressure-Off Brake and the Valve Block Assembly
AMM 29-10-00-863-001
Pressurize the Green Hydraulic System with a Hydraulic Ground Power-Cart
AMM 29-10-00-864-001
Depressurize the Green Hydraulic System
AMM 29-10-00-864-003
Depressurize the Blue Hydraulic System
3. Fault Confirmation
Subtask 27-81-00-710-055-A
A. Test
   (1) Do the operational test of the slat system AMM 27-84-00-710-001:
  • if the slats do not move, do the fault isolation procedure in Para. 4.A.(1)
  • if the slats move unsteady or more slowly than normal, start the fault isolation procedure at Para. 4.B..
   (2) If you did not find a fault during the operational test procedure, go to 4.A.(5).
4. Fault Isolation
Subtask 27-81-00-810-059-A
A. Procedure
   (1) Do a check of the Position Pick-off Units (PPUs) on the Centralized Fault Display System (CFDS) and make a record of the APPU and FPPU synchro angles, AMM 27-54-49-000-001 and AMM 27-54-49-400-001.
NOTE: This data will let you compare APPU and FPPU angles, before and after installation of a part of the slat transmission system. The difference in angles must be in the specified limits.
   (2) Move the slat control lever to a different applicable position and see if there is movement of the PCU (6001CM) output shafts:
  • If there is movement of the PCU output shafts, go to step (5)
  • If there is no movement of the PCU output shafts, do the next step.
   (3) Disconnect the PCU shaft:
  • If the transmission shaft moves freely, do the next step
  • If the transmission shaft does not move freely, go to Para.4.C..
   (4) Replace the SLAT-PCU [6001CM] , AMM 27-84-51-000-001 and AMM 27-84-51-400-001.
   (5) Do the reset of the torque limiters AMM 27-80-00-866-006 and record a possibly tripped torque limiter.
     (a) If a tripped torque limiter is found: Examine the related drive station, AMM 27-84-00-210-001. If necessary lubricate the items which were before cleaned for inspection, AMM 12-22-27-640-006.
     (b) Do a detailed visual inspection of the transmission assembly outboard of the tripped torque limiter.
     (c) If a fault is found, correct or repair as necessary, (Ref. AMM chap. 27).
     (d) If you find no fault, replace the slat actuators which have a tripped torque limiter:
For the actuator type A:
  • SLAT ACTUATOR TYPE A [6013CM]
  • SLAT ACTUATOR TYPE A [6015CM]
  • SLAT ACTUATOR TYPE A [6063CM]
  • SLAT ACTUATOR TYPE A [6065CM]
AMM 27-84-48-000-001 and AMM 27-84-48-400-001.
For the actuator type B:
   (6) If no tripped torque limiter was found:
Move the slats, AMM 27-80-00-866-004 and AMM 27-80-00-866-005.
     (a) While the flaps move, do a check for incorrect noise at the WTB.
     (b) If there is an incorrect noise at the WTB, replace the WING TIP BRAKE [35CV] or WING TIP BRAKE [36CV] ,
AMM 27-81-51-000-001 and AMM 27-81-51-400-001.
     (c) If there is no incorrect noise at the WTB, disconnect the transmission shafts on each side of the WTB (Ref. see above).
     (d) Make sure that the WTB turns easily, if it does not turn easily, replace the WTB (Ref. see above).
NOTE: The breakout torque of the WTB must not be more than 0.5 m.N (4.4 lbf.in).
     (e) If the fault continues and no torque limiter was tripped, go to Para.4.B..
Subtask 27-81-00-810-094-A
B. Check of the Hydraulic Motor
   (1) Do the test in Para. 3.A., as follows:
     (a) Depressurize the green hydraulic system AMM 29-10-00-864-001.
NOTE: This is to make sure that only the slat system 1 PCU hydraulic motor operates.
     (b) Do the operational test of the slat system.
     (c) Record the time necessary to extend the slats and to retract the slats
     (d) Pressurize the green hydraulic system AMM 29-10-00-863-001.
     (e) Depressurize the blue hydraulic system AMM 29-10-00-864-003.
NOTE: This is to make sure that only the slat system 2 PCU hydraulic motor operates.
     (f) Do the operational test of the slat system.
     (g) Record the time necessary to extend the slats and to retract the slats
     (h) Replace the PCU Hydraulic Motor on the slower system AMM 27-84-54-000-002 and AMM 27-84-54-400-002.
   (2) Do the test in Para. 3.A..
   (3) If the fault continues, go to Para.4.C..
Subtask 27-81-00-810-095-A
C. Check of the Transmission Assembly
   (1) Do the detailed visual inspection of the Transmission Assembly , AMM 27-84-00-200-001.
     (a) If it is not possible to move the slats for the visual inspection, move the slats manually AMM 27-80-00-866-007.
   (2) Remove each transmission shaft, one at a time to do a check for friction in each component of the slat system, (Ref. AMM chap. 27, removal and installation procedures).
     (a) If you find a fault, correct or repair as necessary. Refer to the AMM 27-5X-XX for the applicable repair, or removal and installation procedures.
     (b) Make sure you install all components removed.
5. Close-up
Subtask 27-81-00-942-056-A
A. Remove the ground support and maintenance equipment, the special and standard tools and all other items.
Subtask 27-81-00-860-057-A
B. Put the aircraft back to its initial configuration.
[Rev.8 from Aug 2018] 2026.04.04 04:27:47 UTC
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