W DOC AIRBUS | AMM A320F

Adjustment of the LH or R/H Thrust Reverser "J" Ring on Wing [CFMB]

TASK 78-36-42-820-002-A
Adjustment of the LH or R/H Thrust Reverser "J" Ring on Wing

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.
MOVEMENT OF COMPONENTS CAN KILL OR CAUSE INJURY TO PERSONS AND/OR CAN CAUSE DAMAGE TO THE EQUIPMENT.
1. Reason for the Job
This task provides information for adjustment of the LH or RH Thrust Reverser "J" ring in order to make sure the "J" ring is fully seated in the outer flange V-groove.
NOTE: The "J" ring does not have to be adjusted if the LH or RH thrust reverser is installed to the same engine and same engine position.
NOTE: The "J" ring must be adjusted on the LH or RH thrust reverser if:
  • You install a new engine, or
  • You install an engine from another position, or
  • You install a new LH or RH thrust reverser.
2. Job Set-up Information
 A. Fixtures, Tools, Test and Support Equipment
REFERENCE
QTY
DESIGNATION
No specific
AR
ACCESS PLATFORM 1M(3 FT)
No specific
AR
WARNING NOTICE(S)
No specific
Torque wrench: range to between 70 and 60 lbf.in (0.79 and 0.68 m.daN ) T
 B. Work Zones and Access Panels
ZONE/ACCESS
ZONE DESCRIPTION
FOR [1000EM1] (ENGINE-1)
437AL, 438AR, 451AL, 452AR
FOR [1000EM2] (ENGINE-2)
447AL, 448AR, 461AL, 462AR
 C. Referenced Information
REFERENCE
DESIGNATION
TASK 71-13-00-010-040-B
Opening of the Fan Cowl Doors
TASK 71-13-00-410-040-B
Closing of the Fan Cowl Doors
TASK 78-30-00-081-041-B
Make the Thrust Reverser Serviceable after Maintenance
TASK 78-30-00-481-041-B
Make the Thrust Reverser Unserviceable for Maintenance
TASK 78-36-00-010-040-B
Opening of the Thrust Reverser Doors
TASK 78-36-00-410-040-B
Closing of the Thrust Reverser Doors
F Location of Outer Flanges and "J" Ring
F "J" Ring Adjustment
F Thrust Reverser Adjusting
3. Job Set-up
Subtask 78-36-42-941-060-A ** ON A/C NOT FOR ALL
A. Safety Precautions
   (1) On the center pedestal, on the ENG panel 115VU:
     (a) Put a WARNING NOTICE(S) to tell persons not to start the engine.
   (2) Make sure that the engine 1(2) shutdown occurred not less than 5 minutes before you do this procedure.
   (3) On the overhead maintenance panel 50VU:
     (a) Make sure that the ON legend of the ENG/FADEC GND PWR/1(2) pushbutton switch is off.
     (b) Put a WARNING NOTICE(S) to tell persons not to energize the FADEC 1(2).
Subtask 78-36-42-010-070-A ** ON A/C NOT FOR ALL
B. Get Access
   (1) Open the fan cowl doors: (Ref. AMM TASK 71-13-00-010-040)
     (a) FOR [1000EM1] (ENGINE-1)
437AL 438AR
     (b) FOR [1000EM2] (ENGINE-2)
447AL 448AR
   (2) Put an ACCESS PLATFORM 1M(3 FT) in position.
Subtask 78-36-42-040-061-A ** ON A/C NOT FOR ALL
C. Make the thrust reverser unserviceable (Ref. AMM TASK 78-30-00-481-041).
Subtask 78-36-42-010-071-A ** ON A/C NOT FOR ALL
D. Open the thrust reverser half doors: (Ref. AMM TASK 78-36-00-010-040)
   (1) FOR [1000EM1] (ENGINE-1)
451AL 452AR
   (2) FOR [1000EM2] (ENGINE-2)
461AL 462AR
4. Procedure
Subtask 78-36-42-820-051-A ** ON A/C NOT FOR ALL
A. Adjustment of the "J" Ring
   (1) Loosen all bolts attaching the "J" Ring to support forward frame flange.
F Location of Outer Flanges and "J" Ring ** ON A/C NOT FOR ALL
F "J" Ring Adjustment ** ON A/C NOT FOR ALL
   (2) Open reverser half to install 0.02 in. (0.5 mm) thick shims.
F "J" Ring Adjustment ** ON A/C NOT FOR ALL
   (3) Install 0.02 in. (0.5 mm) thick shims between centering pins and bushings.
F Thrust Reverser Adjusting ** ON A/C NOT FOR ALL
   (4) Push thrust reverser half firmly to close and lock all four latches.
NOTE: If necessary remove the screws and locking bracket, and loosen stirrup nuts.
   (5) Check that there is no gap at shim locations.
   (6) Use a wooden mallet and, starting at the 3 or 9 o'clock position, tap "J" Ring at 4 in. (101.60 mm) intervals (every six bolts), working alternately from center position toward the extremities of "J" Ring segment. Torque bolts at the same time at mallet impact points to between 70 and 60 lbf.in (0.79 and 0.68 m.daN ) T. Repeat same operation for other reverser half if it was replaced.
F "J" Ring Adjustment ** ON A/C NOT FOR ALL
   (7) Open reverser half to remove the 0.02 in. (0.5 mm) thick shims.
   (8) Remove the 0.02 in. (0.5 mm) thick shims between centering pins and bushings.
   (9) TORQUE remaining bolts to between 70 and 60 lbf.in (0.79 and 0.68 m.daN ) T.
5. Close-up
Subtask 78-36-42-410-066-A ** ON A/C NOT FOR ALL
A. Close Access
   (1) Make sure that the work area is clean and clear of tools and other items.
   (2) Close the thrust reverser cowl doors: (Ref. AMM TASK 78-36-00-410-040)
     (a) FOR [1000EM1] (ENGINE-1)
451AL 452AR
     (b) FOR [1000EM2] (ENGINE-2)
461AL 462AR
Subtask 78-36-42-440-058-A ** ON A/C NOT FOR ALL
B. Make the thrust reverser serviceable (Ref. AMM TASK 78-30-00-081-041)
Subtask 78-36-42-410-067-A ** ON A/C NOT FOR ALL
C. Close Access
   (1) Close the fan cowl doors: (Ref. AMM TASK 71-13-00-410-040)
     (a) FOR [1000EM1] (ENGINE-1)
437AL 438AR
     (b) FOR [1000EM2] (ENGINE-2)
447AL 448AR
   (2) Remove the access platform(s).
   (3) Remove the WARNING NOTICE(S).
[Rev.10 from 2021] 2026.04.01 03:26:41 UTC
"Aviabrain" 2025