W DOC AIRBUS | AMM A320F

Detailed Inspection of the Thrust Reverser Actuator Fittings and Attachment to Translating Sleeves [CFML]

TASK 78-31-46-220-801-A
Detailed Inspection of the Thrust Reverser Actuator Fittings and Attachment to Translating Sleeves

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.
ZONE: 400
1. Reason for the Job
Refer to the MPD TASK: 783228-01
DETAILED INSPECTION OF THE THRUST REVERSER, ACTUATOR FITTINGS AND ATTACHMENT TO TRANSLATING SLEEVES.
2. Job Set-up Information
 A. Fixtures, Tools, Test and Support Equipment
REFERENCE
QTY
DESIGNATION
No specific
1
ACCESS PLATFORM 1M(3 FT)
No specific
1
LIGHT SOURCE - HIGHPOWER
No specific
1
MIRROR - INSPECTION
No specific
AR
WARNING NOTICE(S)
No specific
Torque wrench: range to between 0.31 and 0.26 m.daN (27.43 and 23.01 lbf.in ) T
 B. Work Zones and Access Panels
ZONE/ACCESS
ZONE DESCRIPTION
400
POWER PLANT, NACELLES AND PYLONS
FOR [4020KM1] (POWER PLANT-DEMOUNTABLE, ENGINE 1)
437AL, 438AR
FOR [4020KM2] (POWER PLANT-DEMOUNTABLE, ENGINE 2)
447AL, 448AR
 C. Referenced Information
REFERENCE
DESIGNATION
TASK 71-13-00-010-803-A
Opening of the Fan Cowl Doors
TASK 71-13-00-410-803-A
Closing of the Fan Cowl Doors
TASK 78-30-00-040-807-A
Deactivation of the Thrust Reverser System for Nacelle Maintenance (ICU)
TASK 78-30-00-440-807-A
Reactivation of the Thrust Reverser System after Nacelle Maintenance (ICU)
F Thrust Reverser Actuator Fitting and Attachment to Translating Sleeves
3. Job Set-up
Subtask 78-31-46-941-050-A
A. Safety Precautions
   (1) On the center pedestal, on ENG panel 115VU:
     (a) Make sure that the ENG/MODE selector switch is in the NORM position.
     (b) 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.
     (c) Put a WARNING NOTICE(S) in position to tell persons not to operate:
  • The ENG/MODE selector switch
  • The ENG/MASTER 1(2) control switch.
   (2) On the ENG section of maintenance panel 50VU:
     (a) Make sure that the ON legend of the FADEC GND PWR/1(2) pushbutton switch is off.
     (b) Put a WARNING NOTICE(S) in position to tell persons not to energize FADEC 1(2).
Subtask 78-31-46-010-050-A
B. 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
     (b) FOR [4020KM2] (POWER PLANT-DEMOUNTABLE, ENGINE 2)
447AL 448AR
   (2) Put an ACCESS PLATFORM 1M(3 FT) in position.
Subtask 78-31-46-040-050-A
C. Deactivation of the Thrust Reverser System 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 nacelle maintenance (Ref. AMM TASK 78-30-00-040-807).
4. Procedure
Subtask 78-31-46-220-050-A
A. Visual Inspection of the Thrust Reverser Actuator Fittings and Attachment to the Translating Sleeves
NOTE: The inspection is the same for the four actuators.
NOTE: You can use the MIRROR - INSPECTION and the LIGHT SOURCE - HIGHPOWER to do this inspection.
   (1) Remove the eight screws (1) and the actuator access panel (2) from the transcowl (3).
   (2) Examine each actuator fitting for:
  • Corrosion
  • Wear
  • Cracks
  • Loose, missing, or damaged fasteners
  • Scratches, marks or dents.
NOTE: The actuator fitting is a clevis bracket that is attached to the translating cowl with ten fasteners. A bushing is installed in the actuator fitting hole that is nearest to the head of the bolt.
   (3) Examine the bolt, nut, cotter pin and bushings that attach the actuator to the actuator fitting for:
  • Corrosion
  • Missing parts
  • Loose parts
  • Wear
  • Cracks.
   (4) If you find signs of external damage, contact Safran Nacelles.
   (5) Install the actuator access panel (2) on the transcowl (3) with the eight screws (1).
   (6) TORQUE the screws (1) to between 0.31 and 0.26 m.daN (27.43 and 23.01 lbf.in ) T.
   (7) Repeat the steps (1) to (6) for the three other actuators.
5. Close-up
Subtask 78-31-46-440-050-A
A. Do the reactivation of the thrust reverser system after nacelle maintenance (Ref. AMM TASK 78-30-00-440-807).
Subtask 78-31-46-410-050-A
B. Close Access
   (1) Make sure that the work area is clean and clear of tools and other items.
   (2) Close the fan cowl doors (Ref. AMM TASK 71-13-00-410-803):
     (a) FOR [4020KM1] (POWER PLANT-DEMOUNTABLE, ENGINE 1)
437AL 438AR
     (b) FOR [4020KM2] (POWER PLANT-DEMOUNTABLE, ENGINE 2)
447AL 448AR
   (3) Remove the access platform(s).
   (4) Remove the WARNING NOTICE(S).
[Rev.10 from 2021] 2026.04.01 03:35:21 UTC
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