DOC AIRBUS | AMM A320FAdjustment of the Thrust Reverser Half Door Latches with a Push Gage [CFMI]
TASK 78-36-41-820-040-A-01
Adjustment of the Thrust Reverser Half Door Latches with a Push Gage
1. Reason for the Job
Self explanatory
2. Job Set-up Information
A. Fixtures, Tools, Test and Support Equipment
B. Work Zones and Access Panels
C. Referenced Information
3. Job Set-up
Subtask 78-36-41-941-063-A ** ON A/C NOT FOR ALL
Subtask 78-36-41-410-070-A ** ON A/C NOT FOR ALL
Subtask 78-36-41-440-062-A ** ON A/C NOT FOR ALL Subtask 78-36-41-410-071-A ** ON A/C NOT FOR ALL
[Rev.10 from 2021]
2026.04.02 06:38:12 UTC
Adjustment of the Thrust Reverser Half Door Latches with a Push Gage
1. Reason for the Job
Self explanatory
2. Job Set-up Information
A. Fixtures, Tools, Test and Support Equipment
B. Work Zones and Access Panels
| ZONE/ACCESS | ZONE DESCRIPTION |
|---|---|
| FOR [1000EM1] (ENGINE-1) | |
| 437AL, 438AR | |
| FOR [1000EM2] (ENGINE-2) | |
| 447AL, 448AR | |
| REFERENCE | DESIGNATION |
|---|---|
| TASK 71-13-00-010-040-A | Opening of the Fan Cowl Doors |
| TASK 71-13-00-410-040-A | Closing of the Fan Cowl Doors |
| TASK 78-30-00-081-041-A | Make the Thrust Reverser Serviceable after Maintenance |
| TASK 78-30-00-481-041-A | Make the Thrust Reverser Unserviceable for Maintenance |
Thrust Reverser Doors LatchesSubtask 78-36-41-941-063-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 78-36-41-010-074-A ** ON A/C NOT FOR ALL (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).
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 on the right side of the engine.
Subtask 78-36-41-040-065-A ** ON A/C NOT FOR ALL 4. Procedure(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 on the right side of the engine.
Subtask 78-36-41-410-070-A ** ON A/C NOT FOR ALL
A. Fasten all Latches
Subtask 78-36-41-820-057-A ** ON A/C NOT FOR ALL CAUTION:
ALL LOCATING PINS MUST BE IN FULL CONTACT WITH BUSHINGS OR DAMAGE COULD OCCUR TO REVERSER.
(1) Make sure of the full contact between each bushing and locating pin. B. Adjustment of the Thrust Reverser Half Door Latches with a Push Gage
(2) Remove the screw which attach the lockwasher.
(3) Remove the lockwasher.
(4) Tighten with your hand the latch tension nut and put it in a position which permits the installation of the lockwasher.
(5) Measure the force on the latch handle tip with the DYNAMOMETER 14 TO 19 DAN ( 30.27 TO 41.09 LBF) - PUSH which is necessary to lock it.
(6) The recorded force must be between 14 daN (31.5 lbf) to 19 daN (42.7 lbf).
(7) If the recorded force is not within tolerances turn the latch tension nut to obtain the force indicated.
(9) TORQUE the screw to between 45 and 35 lbf.in (0.51 and 0.40 m.daN )
.
(10) Adjust the three other latches with the same procedure step 1 to step 9.
(11) Do a check of each latch from the front to the rear. The force applied on the latch handle tip must be between 14 daN (31.5 lbf) to 19 daN (42.7 lbf).
5. Close-upNOTE: You must apply this procedure after the installation of a complete thrust reverser or after changing a reverser half door on the aircraft.
(1) Open the forward latch. (2) Remove the screw which attach the lockwasher.
(3) Remove the lockwasher.
(4) Tighten with your hand the latch tension nut and put it in a position which permits the installation of the lockwasher.
(5) Measure the force on the latch handle tip with the DYNAMOMETER 14 TO 19 DAN ( 30.27 TO 41.09 LBF) - PUSH which is necessary to lock it.
(6) The recorded force must be between 14 daN (31.5 lbf) to 19 daN (42.7 lbf).
(7) If the recorded force is not within tolerances turn the latch tension nut to obtain the force indicated.
NOTE: Turn the tension nut by twelth of a turn to keep the position which permits the installation of the lockwasher.
(8) Install the lockwasher and screw which attach the latch tension nut. (9) TORQUE the screw to between 45 and 35 lbf.in (0.51 and 0.40 m.daN )
. (10) Adjust the three other latches with the same procedure step 1 to step 9.
(11) Do a check of each latch from the front to the rear. The force applied on the latch handle tip must be between 14 daN (31.5 lbf) to 19 daN (42.7 lbf).
Subtask 78-36-41-440-062-A ** ON A/C NOT FOR ALL Subtask 78-36-41-410-071-A ** ON A/C NOT FOR ALL
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 71-13-00-410-040).
(a) FOR [1000EM1] (ENGINE-1)
437AL 438AR
(b) FOR [1000EM2] (ENGINE-2)
447AL 448AR
(3) Remove the access platform(s).
(4) Remove the WARNING NOTICE(S).
(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 71-13-00-410-040).
(a) FOR [1000EM1] (ENGINE-1)
437AL 438AR
(b) FOR [1000EM2] (ENGINE-2)
447AL 448AR
(3) Remove the access platform(s).
(4) Remove the WARNING NOTICE(S).