W DOC AIRBUS | AMM A320F

Installation of the Thrust Reverser Cowl Latches and Keepers [CFML]

TASK 78-36-41-400-802-A
Installation of the Thrust Reverser Cowl Latches and Keepers

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.
ZONE: 400
1. Reason for the Job
Self explanatory
2. Job Set-up Information
 A. Fixtures, Tools, Test and Support Equipment
REFERENCE
QTY
DESIGNATION
No specific
AR
WARNING NOTICE(S)
No specific
Torque wrench: range to between 0.30 and 0.26 m.daN (26.55 and 23.01 lbf.in ) T
No specific
Torque wrench: range to between 0.374 and 0.306 m.daN (33.10 and 27.08 lbf.in ) T
 B. Consumable Materials
REFERENCE
DESIGNATION
(Material No.CPNCL00062)
Synthetic base lubricating oil - turbine engine
(Material No.CPNCL00653)
Lubricant (molykote G-rapid plus paste)
(Material No.CPNCL02069)
Textile - lint free cotton
(Material No.CPNCL02589)
Diestone DLS
 C. 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
FOR [4020KM2] (POWER PLANT-DEMOUNTABLE, ENGINE 2)
447AL, 448AR, 461AL
 D. Expendable Parts
FIG.ITEM
DESIGNATION
IPC-CSN
3
LATCH PIN L1
AIPC 78-30-25-10-255
8
COTTER PIN
AIPC 78-30-25-10-265
11
COTTER PIN
AIPC 78-30-25-10-280
47
COTTER PIN
AIPC 78-30-25-10-285
17
COTTER PIN
AIPC 78-30-25-10-305
18
LATCH PIN L6
AIPC 78-30-25-10-310
 E. 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)
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
TASK 78-36-41-820-802-A
Adjustment of the Thrust Reverser Cowl Latch Tension
F Thrust Reverser Cowl Latches and Keepers
3. Job Set-up
Subtask 78-36-41-941-070-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) Make sure that the WARNING NOTICE(S) are 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) Make sure that the WARNING NOTICE(S) is in position to tell persons not to energize FADEC 1(2).
Subtask 78-36-41-010-087-A
B. Get Access
   (1) Make sure that the fan cowl doors are open (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 78-36-41-040-072-A
C. Deactivation of the Thrust Reverser System for Nacelle 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) Make sure that the thrust reverser is unserviceable for nacelle maintenance (Ref. AMM TASK 78-30-00-040-807).
Subtask 78-36-41-010-088-A
D. Get Access
   (1) Make sure that the left thrust reverser cowl-door is open (Ref. AMM TASK 78-36-00-010-806):
     (a) FOR [4020KM1] (POWER PLANT-DEMOUNTABLE, ENGINE 1)
451AL
     (b) FOR [4020KM2] (POWER PLANT-DEMOUNTABLE, ENGINE 2)
461AL
4. Procedure
Subtask 78-36-41-420-057-A
WARNING: USE PROTECTIVE GOGGLES WHEN YOU REMOVE OR INSTALL A COTTER PIN. EACH TIME YOU REMOVE A COTTER PIN DURING THE TASK, DISCARD IT IMMEDIATELY. A LOOSE COTTER PIN CAN CUT YOU OR MAKE YOU BLIND.
A. Installation of the Thrust Reverser Cowl Latches
NOTE: You can install each latch independently of the others.
   (1) Installation of the latches L4-1 (24) and L4-2 (25):
CAUTION: MAKE SURE THAT THE THRUST REVERSER COWL DOORS DO NOT EXTEND TO MORE THAN 254 MM (10 IN.). IF THEY DO, THERE IS A HIGH RISK THAT DAMAGE TO THE THRUST REVERSER END AND THE WING WILL OCCUR.
     (a) Make sure that the thrust reverser cowl-doors are deployed to 254 mm (10.00 in.) maximum (Ref. AMM TASK 78-32-50-010-801).
     (b) Clean all the parts and the contact surfaces with a Textile - lint free cotton (Material No.CPNCL02069) made moist with Diestone DLS (Material No.CPNCL02589) .
     (c) Apply CPNCL00653Lubricant (molykote G-rapid plus paste) on the pin (23).
     (d) Put latches L4-1 (24) and L4-2 (25) in position.
     (e) Install the pin (23).
     (f) Install the retainer (22).
     (g) Lubricate the threads of the screws (21) with Synthetic base lubricating oil - turbine engine (Material No.CPNCL00062) .
     (h) Install and TORQUE the screws (21) to between 0.30 and 0.26 m.daN (26.55 and 23.01 lbf.in ) T.
   (2) Installation of the latches LACC-1 (19) and LACC-2 (20).
     (a) Clean all the parts and the contact surfaces with a Textile - lint free cotton (Material No.CPNCL02069) made moist with Diestone DLS (Material No.CPNCL02589) .
     (b) Apply CPNCL00653Lubricant (molykote G-rapid plus paste) on the pin (18).
     (c) Put latches LACC-1 (19) and LACC-2 (20) in position.
     (d) Install a new AIPC 78-30-25-10-310 LATCH PIN L6 (18).
     (e) Install a new AIPC 78-30-25-10-305 COTTER PIN (17).
     (f) Close the thermal blanket (16) and tighten the screws (15) by 1/4 of a turn.
   (3) Installation of the latches L3-1 (13) and L3-2 (14):
     (a) Clean all the parts and the contact surfaces with a Textile - lint free cotton (Material No.CPNCL02069) made moist with Diestone DLS (Material No.CPNCL02589) .
     (b) Apply CPNCL00653Lubricant (molykote G-rapid plus paste) on the pin (12).
     (c) Put latches L3-1 (13) and L3-2 (14) in position.
     (d) Install the pin (12).
       1 Install a new AIPC 78-30-25-10-280 COTTER PIN (11) and AIPC 78-30-25-10-285 COTTER PIN (47).
   (4) Installation of the latch L2 (10):
     (a) Clean all the parts and the contact surfaces with a Textile - lint free cotton (Material No.CPNCL02069) made moist with Diestone DLS (Material No.CPNCL02589) .
     (b) Apply CPNCL00653Lubricant (molykote G-rapid plus paste) on the pin (9).
     (c) Put latch L2 (10) in position.
     (d) Install the pin (9).
     (e) Install a new AIPC 78-30-25-10-265 COTTER PIN (8).
     (f) Install the fire box latch L2 (7) with the washers (6) and screws (5).
     (g) TORQUE the screws (5) to between 0.374 and 0.306 m.daN (33.10 and 27.08 lbf.in ) T.
   (5) Installation of the latch L1 (4):
     (a) Clean all the parts and the contact surfaces with a Textile - lint free cotton (Material No.CPNCL02069) made moist with Diestone DLS (Material No.CPNCL02589) .
     (b) Apply CPNCL00653Lubricant (molykote G-rapid plus paste) on the pin (3).
     (c) Put latch L1 (4) in position.
     (d) Install the AIPC 78-30-25-10-255 LATCH PIN L1 (3).
     (e) Install the fork latch L1 pin retention (2) with the screw (1).
     (f) TORQUE the screw (1) to between 0.374 and 0.306 m.daN (33.10 and 27.08 lbf.in ) T.
Subtask 78-36-41-420-058-A
B. Installation of the Thrust Reverser Cowl Latch Keepers
NOTE: You can install each latch keeper independently of the others.
   (1) Clean all the parts and the contact surfaces with a Textile - lint free cotton (Material No.CPNCL02069) made moist with Diestone DLS (Material No.CPNCL02589) .
   (2) Installation of the latch keeper L1 (28):
     (a) Install the spring (27) on the latch keeper L1 (28).
     (b) Put the latch keeper L1 (28) with the spring (27) in position and the tension nut (26).
     (c) Turn the tension nut (26) until it is in correct position.
   (3) Installation of the latch keeper L2 (31):
     (a) Install the spring (30) on the latch keeper L2 (31).
     (b) Put the latch keeper L2 (31) with the spring (30) in position and the tension nut (29).
     (c) Turn the tension nut (29) until it is in correct position.
   (4) Installation of the latch keeper L3-1 (34) and L3-2 (37):
     (a) Install the spring (33) and (36) on the latch keeper L3-1 (34) and L3-2 (37).
     (b) Put the latch keeper L3-1 (34) and L3-2 (37) with the spring (33) and (36) in position and the tension nuts (32) and (35).
     (c) Turn the tension nuts (32) and (35) until they are in correct position.
   (5) Installation of the latch keeper LACC-1 (40) and LACC-2 (43):
     (a) Install the spring (39) and (42) on the latch keeper LACC-1 (40) and LACC-2 (43).
     (b) Put the latch keeper LACC-1 (40) and LACC-2 (43) with the spring (39) and (42) in position and the tension nuts (38) and (41).
     (c) Turn the tension nuts (38) and (41) until they are in correct position.
   (6) Installation of the transcowl latch keepers L4-1 and L4-2:
     (a) Install the keeper bolt (46).
     (b) Put the keeper retainer (45) in position.
     (c) Lubricate the threads of the screws (44) with Synthetic base lubricating oil - turbine engine (Material No.CPNCL00062) .
     (d) Install and TORQUE the screws (44) to between 0.30 and 0.26 m.daN (26.55 and 23.01 lbf.in ) T.
5. Close-up
Subtask 78-36-41-410-076-A
A. Close Access
   (1) Make sure that the work area is clean and clear of tools and other items.
   (2) Manually stow the thrust reverser cowl-doors (Ref. AMM TASK 78-32-50-410-801), if deployed to install latch L4-1 (24) and L4-2 (25).
   (3) Do the adjustment of the thrust-reverser cowl latch-tension (Ref. AMM TASK 78-36-41-820-802).
   (4) Close the left thrust-reverser cowl-door (Ref. AMM TASK 78-36-00-410-806):
     (a) FOR [4020KM1] (POWER PLANT-DEMOUNTABLE, ENGINE 1)
451AL
     (b) FOR [4020KM2] (POWER PLANT-DEMOUNTABLE, ENGINE 2)
461AL
Subtask 78-36-41-440-065-A
B. Do the reactivation of the thrust reverser system after nacelle maintenance (Ref. AMM TASK 78-30-00-440-807).
Subtask 78-36-41-410-077-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).
[Rev.10 from 2021] 2026.04.02 06:39:34 UTC
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