W DOC AIRBUS | AMM A320F

Removal of the Blocker Doors Actuation Levers [CFMI]

TASK 78-31-17-000-042-A
Removal of the Blocker Doors Actuation Levers

ZONE: 400
FIN: 4103KS1 ** ON A/C NOT FOR ALL
FIN: 4103KS2 ** ON A/C NOT FOR ALL
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
ACCESS PLATFORM 1M(3 FT)
No specific
AR
WARNING NOTICE(S)
 B. Work Zones and Access Panels
ZONE/ACCESS
ZONE DESCRIPTION
400
POWER PLANT, NACELLES AND PYLONS
FOR [1000EM1] (ENGINE-1)
437AL, 438AR
FOR [1000EM2] (ENGINE-2)
447AL, 448AR
 C. Referenced Information
REFERENCE
DESIGNATION
TASK 71-13-00-010-040-A
Opening of the Fan Cowl Doors
TASK 78-30-00-481-041-A
Make the Thrust Reverser Unserviceable for Maintenance
TASK 78-31-17-000-040-A
Removal of the Blocker Door Deploy Switch
TASK 78-32-41-000-040-A
Removal of the Lower Blocker Door
TASK 78-32-41-000-041-A
Removal of the Upper Blocker Door
F Blocker Door Switch, Actuation Levers and Beam Electrical Harness PRE SB RA32078-39
F Blocker Door Switch, Actuation Levers and Beam Electrical Harness POST SB RA32078-39
F Blocker Door Switch, Actuation Levers and Beam Electrical Harness
3. Job Set-up
Subtask 78-31-17-941-062-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 78-31-17-010-065-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 the ACCESS PLATFORM 1M(3 FT) in position on the right side of the engine.
Subtask 78-31-17-040-059-A ** ON A/C NOT FOR ALL
C. Make the thrust reverser unserviceable (Ref. AMM TASK 78-30-00-481-041).
Subtask 78-31-17-010-066-A ** ON A/C NOT FOR ALL
D. Remove the blocker door deploy switch (Ref. AMM TASK 78-31-17-000-040).
4. Procedure
Subtask 78-31-17-020-057-A ** ON A/C NOT FOR ALL
A. Removal of the Blocker Doors Actuation Levers

PRE SB RA32078-39

   (1) Remove the bolts which attach the trigger.
F Blocker Door Switch, Actuation Levers and Beam Electrical Harness PRE SB RA32078-39 ** ON A/C NOT FOR ALL

POST SB RA32078-39

   (2) Remove the screw and the nut which attach the trigger.
F Blocker Door Switch, Actuation Levers and Beam Electrical Harness POST SB RA32078-39 ** ON A/C NOT FOR ALL

END OF SB RA32078-39

   (3) Remove the trigger.
   (4) Remove the lower or upper blocker door (Ref. AMM TASK 78-32-41-000-040) or (Ref. AMM TASK 78-32-41-000-041).
   (5) Remove the bolt and the lock washer which attach the lever on the beam.
F Blocker Door Switch, Actuation Levers and Beam Electrical Harness PRE SB RA32078-39 ** ON A/C NOT FOR ALL
F Blocker Door Switch, Actuation Levers and Beam Electrical Harness POST SB RA32078-39 ** ON A/C NOT FOR ALL
F Blocker Door Switch, Actuation Levers and Beam Electrical Harness ** ON A/C NOT FOR ALL
   (6) Remove the inner and outer levers.
[Rev.10 from 2021] 2026.04.01 03:20:37 UTC
"Aviabrain" 2025