W DOC AIRBUS | AMM A320F

Detailed Inspection of Blocker Doors, Cascades, IFS Link Arms Fittings [CFML]

TASK 78-32-00-220-808-A
Detailed Inspection of Blocker Doors, Cascades, IFS Link Arms Fittings

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.
WARNING: BE CAREFUL WHEN YOU USE CONSUMABLE MATERIALS. OBEY THE MATERIAL MANUFACTURER'S INSTRUCTIONS AND YOUR LOCAL REGULATIONS.
CAUTION: DO NOT OPEN THE THRUST REVERSER COWLS WHEN THE TRANSLATING COWL IS DEPLOYED. DO NOT DEPLOY THE TRANSLATING COWL WHEN THRUST REVERSER COWLS ARE OPEN. IF YOU DO NOT OBEY THESE INSTRUCTIONS, THE THRUST REVERSER COWLS CAN TOUCH THE WING AND DAMAGE CAN OCCUR.
CAUTION: DO NOT OPEN THE THRUST REVERSER IF YOU CANNOT STOW THE TRANSLATING COWL, AND THE TRANSLATING COWL IS DEPLOYED MORE THAN 10 INCHES (254 MM). IF YOU DO, THE TRANSLATING COWL CAN HIT THE WING AND CAUSE DAMAGE TO EQUIPMENT.
ZONE: 400
1. Reason for the Job
Refer to the MPD TASK: 783200-L1
DETAILED INSPECTION OF BLOCKER DOORS, CASCADES, IFS LINK ARMS FITTINGS.
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
1
BORESCOPE SET
No specific
1
LIGHT SOURCE - INSPECTION
No specific
1
MAT - PROTECTIVE
No specific
1
MIRROR - INSPECTION
No specific
AR
WARNING NOTICE(S)
 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, 451AL, 452AR
FOR [4020KM2] (POWER PLANT-DEMOUNTABLE, ENGINE 2)
447AL, 448AR, 461AL, 462AR
 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 73-29-00-740-804-A
Thrust Reverser Cycling Test (Menu Mode)
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)
TASK 78-32-42-000-804-A
Removal of the Thrust Reverser Blocker Doors
TASK 78-32-42-370-801-A
Painting of Link Arm with Damaged Paint Coating
TASK 78-32-42-400-804-A
Installation of the Thrust Reverser Blocker Doors
TASK 78-32-43-000-806-A
Removal of the Thrust Reverser Cascades
TASK 78-32-43-400-806-A
Installation of the Thrust Reverser Cascades
TASK 78-32-47-000-802-A
Removal of the Link Arm Fitting Fairing
TASK 78-32-47-400-802-A
Installation of the Link Arm Fitting Fairing
TASK 78-32-50-010-801-A
Manually Deploy the Translating Cowl
TASK 78-32-50-410-801-A
Manually Stow the Translating Cowl
TASK 78-36-00-010-806-A
Opening of the Thrust Reverser Cowl Doors
TASK 78-36-00-410-806-A
Closing of the Thrust Reverser Cowl Doors
NSRM 543058
NSRM 543060
F Detailed Inspection of the Cascades
F Detailed Inspection of the Blocker Doors, Link Arms, Hinge Fitting and Spring Fitting
3. Job Set-up
Subtask 78-32-00-941-114-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 78-32-00-010-166-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
Subtask 78-32-00-040-113-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).
Subtask 78-32-00-010-167-A
D. Get Access
   (1) Manually deploy the translating cowl (Ref. AMM TASK 78-32-50-010-801).
   (2) Put an ACCESS PLATFORM 2M (6 FT) - ADJUSTABLE in position.
4. Procedure
Subtask 78-32-00-220-052-A
A. Detailed Inspection of the Cascades
F Detailed Inspection of the Cascades
NOTE: You can use the LIGHT SOURCE - INSPECTION and the MIRROR - INSPECTION for the inspection.
NOTE: This procedure is given for one cascade. It is also applicable for the other cascades on the left and right thrust reversers.
   (1) Get access to the outer side of the cascade (1):
     (a) Do the inspection for:
  • Cracks
  • Impacts
  • Nicks
  • Scratches
  • Gouges
  • Delaminations
  • Loose or missing screws.
     (b) If you find damage (cracks, impacts, nicks, scratches, gouges or delaminations), contact SAFRAN Nacelles.
     (c) If you find loose or missing screws:
       1 Install the loose or missing screws (Ref. AMM TASK 78-32-43-400-806).
   (2) Inspection of the inner side of the cascade (1):
     (a) Do an inspection with the MIRROR - INSPECTION or the BORESCOPE SET through the holes of the cascade (1) for:
  • Cracks
  • Impacts
  • Nicks
  • Scratches
  • Gouges
  • Delaminations.
     (b) If you find damage (nicks, scratches, gouges or delaminations), refer to NSRM 543060.
     (c) If you find damage (cracks or impacts), contact SAFRAN Nacelles.
       1 Replace the cascade (1), if necessary (Ref. AMM TASK 78-32-43-000-806) and (Ref. AMM TASK 78-32-43-400-806).
Subtask 78-32-00-220-053-A
B. Detailed Inspection of the Blocker Doors (Aft Skin)
F Detailed Inspection of the Blocker Doors, Link Arms, Hinge Fitting and Spring Fitting
NOTE: This procedure is given for one blocker door. It is also applicable for the other blocker doors on the left and right thrust reversers.
   (1) Make sure that the translating cowl is deployed (Ref. AMM TASK 78-32-50-010-801).
   (2) Make sure that the thrust reverser cowl door is closed (Ref. AMM TASK 78-36-00-410-806).
   (3) Get access to the work area from the aft side of the engine.
   (4) Install the MAT - PROTECTIVE on the lower internal location of the C-duct.
   (5) Make sure that the hinge fittings (3) of the blocker doors (2) are attached correctly.
   (6) Make sure that the spring fitting (4) of the blocker doors (2) is attached correctly.
   (7) Do a detailed inspection of the blocker door assembly for:
  • Damage on the hinge fittings (3) and the spring fitting (4)
  • Missing fasteners on the hinge fittings (3) and the spring fitting (4)
  • Nicks, scratches, gouges or cracks on the aft skin of the blocker door (2).
     (a) If you find damage (nicks, scratches or gouges), refer to NSRM 543058.
     (b) If you find other damage, contact SAFRAN Nacelles.
Subtask 78-32-00-220-054-A
C. Detail Inspection of the Link Arms and the Blocker Doors (Front Skin)
F Detailed Inspection of the Blocker Doors, Link Arms, Hinge Fitting and Spring Fitting
NOTE: This procedure is given for one link arm. It is also applicable for the other link arms on left and right thrust reversers.
   (1) Manually stow the translating cowl (Ref. AMM TASK 78-32-50-410-801).
   (2) Open the thrust reverser cowl doors (Ref. AMM TASK 78-36-00-010-806):
     (a) FOR [4020KM1] (POWER PLANT-DEMOUNTABLE, ENGINE 1)
451AL 452AR.
     (b) FOR [4020KM2] (POWER PLANT-DEMOUNTABLE, ENGINE 2)
461AL 462AR.
   (3) Examine the clearance of the blocker door (2):
     (a)
F Detailed Inspection of the Blocker Doors, Link Arms, Hinge Fitting and Spring Fitting
     (b) Compare with the other blocker doors (2) to make sure that the clearance of the applicable blocker door (2) is satisfactory.
     (c) If the clearance of the blocker door (2) is more than the normal clearance:
       1 Loosen the nuts (5) and tighten them to make sure that the installation is correct (Ref. AMM TASK 78-32-42-400-804).
   (4) Disconnect the link arm (6) from the link arm fitting (9) of the inner fixed structure (Ref. AMM TASK 78-32-42-000-804).
   (5) Do a detail inspection of the blocker door (2) for:
  • Cracks
  • Nicks
  • Scratches
  • Gouges.
     (a) If you find damage (nicks, scratches or gouges), refer to NSRM 543058.
     (b) If you find crack damage, contact SAFRAN Nacelles.
   (6) Do a detail inspection of the link arm ball bearings (7) on the two ends of the link arm (6) for:
  • Damage
  • Corrosion
  • Abnormal free play.
     (a) If you find corrosion, contact SAFRAN Nacelles.
     (b) If you cannot remove the corrosion or if link arm ball bearings (7) are damaged or if you find abnormal free play, replace the link arm (6) (Ref. AMM TASK 78-32-42-000-804) and (Ref. AMM TASK 78-32-42-400-804).
   (7) Do a detail inspection of the link arm for:
  • Damaged painting.
     (a) If you find damaged painting, repair the link arm (6) (Ref. AMM TASK 78-32-42-370-801).
Subtask 78-32-00-220-055-A
D. Detail Inspection of the Link Arm Fittings
See Sheets 2 and 3 of the figure:
F Detailed Inspection of the Blocker Doors, Link Arms, Hinge Fitting and Spring Fitting
NOTE: This procedure is given for one link arm fitting. It is also applicable for the other link arm fittings on left and right thrust reversers.
   (1) Make sure that the translating cowl is stowed (Ref. AMM TASK 78-32-50-410-801).
   (2) Make sure that the thrust reverser cowl doors are open (Ref. AMM TASK 78-36-00-010-806).
   (3) Disconnect the link arm fitting fairing (8) (Ref. AMM TASK 78-32-47-000-802).
   (4) Do a detail inspection of the link arm fitting (9) for:
  • Corrosion
  • Nicks
  • Cracks
  • Scratches
  • Gouges
  • Wear.
     (a) If you find damage (corrosion, nicks, cracks, scratches, gouges and wear), contact SAFRAN Nacelles.
   (5) Install the link arm fitting fairing (8) (Ref. AMM TASK 78-32-47-400-802).
   (6) Connect the link arm (6) to the link arm fitting (9) (Ref. AMM TASK 78-32-42-400-804).
5. Close-up
Subtask 78-32-00-410-155-A
A. Close Access
   (1) Remove the COVER - PROTECTION.
   (2) Make sure that the work area is clean and clear of tools and other items.
   (3) Remove the access platform(s).
   (4) Close the thrust reverser cowl-doors (Ref. AMM TASK 78-36-00-410-806):
     (a) FOR [4020KM1] (POWER PLANT-DEMOUNTABLE, ENGINE 1)
451AL 452AR
     (b) FOR [4020KM2] (POWER PLANT-DEMOUNTABLE, ENGINE 2)
461AL 462AR
Subtask 78-32-00-440-105-A
B. Do the reactivation of the thrust reverser system after nacelle maintenance (Ref. AMM TASK 78-30-00-440-807).
Subtask 78-32-00-410-156-A
C. Close Access
   (1) 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
   (2) Remove the WARNING NOTICE(S).
Subtask 78-32-00-710-056-A
D. Do an operational test of the thrust reverser system (Ref. AMM TASK 73-29-00-740-804).
[Rev.10 from 2021] 2026.04.01 03:35:48 UTC
"Aviabrain" 2025