W DOC AIRBUS | AMM A320F

Adjustment of the Inhibit Cable [PW11]

TASK 78-31-06-820-801-A
Adjustment of the Inhibit Cable

WARNING: BE CAREFUL WHEN YOU DO WORK ON THE ENGINE AFTER SHUTDOWN. THE ENGINE CAN STAY HOT FOR A LONG TIME. IF YOU DO NOT OBEY THIS INSTRUCTION, INJURY CAN OCCUR.
WARNING: WEAR APPLICABLE PERSONAL PROTECTIVE EQUIPMENT (PPE) WHEN YOU DO THIS TASK. BEFORE YOU USE PPE, READ, UNDERSTAND AND OBEY ALL INSTRUCTIONS FOR ITS USE. THESE INSTRUCTIONS INCLUDE INSTRUCTIONS FROM THE MANUFACTURER, YOUR EMPLOYER AND GOVERNMENT REGULATIONS. YOU CAN GET INJURED IF YOU DO NOT USE PPE. GET INSTRUCTIONS FROM YOUR EMPLOYER ON WHICH PPE IS NECESSARY.
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
1
ACCESS PLATFORM 2M (6 FT) - ADJUSTABLE
No specific
Torque wrench: range to between 27 and 22 lbf.in (0.31 and 0.25 m.daN ) T
No specific
Torque wrench: range to between 35 and 30 lbf.in (0.40 and 0.34 m.daN ) T
 B. Work Zones and Access Panels
ZONE/ACCESS
ZONE DESCRIPTION
400
POWER PLANT, NACELLES AND PYLONS
FOR [4020KM1] (POWER PLANT-DEMOUNTABLE, ENG 1)
413AT, 437AL, 438AR
FOR [4020KM2] (POWER PLANT-DEMOUNTABLE, ENG 2)
423AT, 447AL, 448AR
 C. Referenced Information
REFERENCE
DESIGNATION
TASK 71-00-00-860-833-A
Procedure to Prevent Engine Motoring
TASK 71-13-00-010-802-A
Opening of the Fan Cowl Doors
TASK 71-13-00-410-802-A
Closing of the Fan Cowl Doors
TASK 78-30-00-040-805-A
Deactivation of the Thrust Reverser System for Ground Maintenance
TASK 78-31-00-710-805-A
Operational Test of Thrust Reverser with MCDU
TASK 78-31-00-710-805-A-01
Thrust Reverser Cycling Test (Engine Running)
TASK 78-31-06-400-801-A
Installation of the Lower Inhibit Lever Cable
TASK 78-31-06-400-802-A
Installation of the Upper Inhibit Lever Cable
F Adjustment of the Inhibit Cable
F Clearance of the HCU Mechanism
3. Job Set-up
Subtask 78-31-06-941-052-A ** ON A/C NOT FOR ALL
A. Safety Precautions
   (1) Do the procedure to prevent engine motoring
(Ref. AMM TASK 71-00-00-860-833).
Subtask 78-31-06-010-052-A ** ON A/C NOT FOR ALL
B. Get Access
   (1) Make sure that the fan cowl doors are open (Ref. AMM TASK 71-13-00-010-802):
     (a) FOR [4020KM1] (POWER PLANT-DEMOUNTABLE, ENG 1)
437AL 438AR
     (b) FOR [4020KM2] (POWER PLANT-DEMOUNTABLE, ENG 2)
447AL 448AR
   (2) Make sure that the ACCESS PLATFORM 2M (6 FT) - ADJUSTABLE is in position.
Subtask 78-31-06-040-050-A ** ON A/C NOT FOR ALL
C. Deactivation of the Thrust Reverser 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) Make sure that you did the deactivation of the thrust reverser system for maintenance (Ref. AMM TASK 78-30-00-040-805).
4. Procedure
Subtask 78-31-06-820-050-A ** ON A/C NOT FOR ALL
A. Adjust the lower inhibit cable.
   (1) Make sure that the upper inhibit cable is installed correctly (Ref. AMM TASK 78-31-06-400-802).
   (2) Make sure that the lower inhibit cable is installed correctly on the engine fan case (Ref. AMM TASK 78-31-06-400-801).
   (3) Make sure that the lower inhibit cable is connected to the upper inhibit cable (Ref. AMM TASK 78-31-06-400-801).
   (4) If you cannot correctly connect the lower inhibit cable and upper inhibit cable, go to the step 4.A.(5).
   (5) Adjust the lower inhibit cable as follows:
CAUTION: MAKE SURE THE LOWER INHIBIT CABLE HANDLE ASSEMBLY AND THE UPPER INHIBIT CABLE ENGAGE CORRECTLY. IF THE LOWER INHIBIT CABLE HANDLE ASSEMBLY AND THE UPPER INHIBIT CABLE ARE NOT ENGAGED CORRECTLY, THE SYSTEM CAN OPERATE INCORRECTLY.
CAUTION: MAKE SURE THAT THE LOCKING PIN IS CORRECTLY ENGAGED. IF THE LOCKING PIN IS NOT CORRECTLY ENGAGED, INCORRECT INSTALLATION AND OPERATION CAN OCCUR.
     (a) Make sure that the lower inhibit cable is in the INHIBITED position.
     (b) Loosen the bolt on the hinged adjustment bracket to disengage the anti-rotational feature from the adjuster wheel.
     (c) Turn the adjuster wheel as necessary.
     (d) Tighten the bolt on the hinged adjustment bracket with your hand. Make sure the anti-rotation feature on the hinged adjustment bracket correctly engages the adjuster wheel. Do not torque the bolt at this time. See the view C of the figure:
F Adjustment of the Inhibit Cable ** ON A/C NOT FOR ALL
     (e) Make sure that the clamps are aligned with the center of the conduit installation references.
       1 If necessary, loosen the bolts on the clamps that attach the lower inhibit cable assembly to the brackets and adjust the conduit installation references.
       2 TORQUE the bolts to between 35 and 30 lbf.in (0.40 and 0.34 m.daN ) T (Ref. AMM TASK 78-31-06-400-801).
   (6) Do a clearance check of the Hydraulic Control Unit (HCU) inhibit mechanism as follows:
     (a) Remove the applicable access panel on the pylon to get access to the HCU:
       1 FOR [4020KM1] (POWER PLANT-DEMOUNTABLE, ENG 1)
413AT
       2 FOR [4020KM2] (POWER PLANT-DEMOUNTABLE, ENG 2)
423AT
     (b) Make sure that the inhibit cable is in the ACTIVE position.
     (c) Measure the clearance of the inhibit mechanism.
F Clearance of the HCU Mechanism ** ON A/C NOT FOR ALL
     (d) Make sure that the clearance is between 0.000 in. (0.00 mm) and 0.033 in. (0.84 mm). If the clearance is larger than 0.033 in. (0.84 mm), go to the step 4.A.(5).
   (7) Do a functional test of the inhibit cables, lower inhibit cable-lever and lockout pin as follows:
     (a) Put the lower inhibit cable in the ACTIVE position.
       1 Remove the lockout pin from the INHIBITED position.
NOTE: If necessary, move the lever a small distance in the direction of the inhibited position to remove the load against the lockout pin.
       2 If you cannot remove lockout pin or cannot remove it easily from the INHIBITED position, go to the step 4.A.(5).
       3 Move the lower inhibit cable-lever to the ACTIVE position and install the lockout pin.
NOTE: Do not move the lower inhibit cable-lever or put load on the lower inhibit cable-lever while you install the lockout pin.
       4 If you cannot move the lower inhibit cable-lever to the ACTIVE position easily, adjust the lower inhibit cable so that there is no load on the cable (Ref. AMM TASK 78-31-06-400-801).
       5 If you cannot install the lockout pin or cannot install it easily in the ACTIVE position, go to the step 4.A.(5).
     (b) Put the lower inhibit cable in the INHIBITED position.
       1 Remove the lockout pin from the ACTIVE position.
       2 Move the lower inhibit cable-lever to the INHIBITED position and install the lockout pin.
       3 If you cannot move the lower inhibit cable-lever to the INHIBITED position easily, adjust the lower inhibit cable so that there is no load on the cable (Ref. AMM TASK 78-31-06-400-801).
       4 If you cannot install the lockout pin or cannot easily install it in the INHIBITED position, go to the step 4.A.(5).
     (c) Put the lower inhibit cable in the ACTIVE position.
       1 Remove the lockout pin from the INHIBITED position.
       2 Move the lower inhibit cable-lever to the ACTIVE position and install the lockout pin.
NOTE: Do not move the lower inhibit cable-lever or put load on the lower inhibit cable-lever while you install the lockout pin.
       3 If you cannot move the lower inhibit cable-lever to the ACTIVE position easily, adjust the lower inhibit cable so that there is no load on the cable (Ref. AMM TASK 78-31-06-400-801).
       4 If you cannot install the lockout pin or cannot install it easily in the ACTIVE position, go to the step 4.A.(5).
     (d) Do steps 4.A.(7)(b) thru 4.A.(7)(c) two more times. Make sure that the lockout pin can be installed in the active and inhibited positions.
   (8) TORQUE the bolt on the hinged adjustment bracket to between 27 and 22 lbf.in (0.31 and 0.25 m.daN ) T.
   (9) Do an operational test of the thrust reverser with the MCDU. Make sure the system operates correctly and the indication in the cockpit is correct (Ref. AMM TASK 78-31-00-710-805).
5. Close-up
Subtask 78-31-06-410-051-A ** ON A/C NOT FOR ALL
A. Close Access
   (1) Install the applicable access panel for the HCU on the pylon:
     (a) FOR [4020KM1] (POWER PLANT-DEMOUNTABLE, ENG 1)
413AT
     (b) FOR [4020KM2] (POWER PLANT-DEMOUNTABLE, ENG 2)
423AT
   (2) Close the fan cowl doors (Ref. AMM TASK 71-13-00-410-802):
     (a) FOR [4020KM1] (POWER PLANT-DEMOUNTABLE, ENG 1)
437AL 438AR
     (b) FOR [4020KM2] (POWER PLANT-DEMOUNTABLE, ENG 2)
447AL 448AR
   (3) Remove the access platform(s).
   (4) Remove the WARNING NOTICE(S).
[Rev.10 from 2021] 2026.04.01 03:31:19 UTC
"Aviabrain" 2025