W DOC AIRBUS | AMM A320F

Reactivation of the Left Modulated Turbine Cooling (MTC) Valve [CFML]

TASK 75-23-00-440-801-A
Reactivation of the Left Modulated Turbine Cooling (MTC) Valve

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.
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 1M(3 FT)
No specific
AR
WARNING NOTICE(S)
No specific
Torque wrench: range to between 30 and 25 lbf.in (0.34 and 0.28 m.daN ) T
 B. Consumable Materials
REFERENCE
DESIGNATION
(Material No.CP2619)
Never Seez-Pure Nickel, Special
(Material No.CP8005)
lockwire 0.6 mm (0.0236 in.) dia
(Material No.CP8006)
safety cable 0.032 in. (0.8 mm) dia.
 C. Work Zones and Access Panels
ZONE/ACCESS
ZONE DESCRIPTION
FOR [4020KM1] (POWER PLANT-DEMOUNTABLE, ENGINE 1)
437AL, 438AR, 451AL
FOR [4020KM2] (POWER PLANT-DEMOUNTABLE, ENGINE 2)
447AL, 448AR, 461AL
 D. 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 78-30-00-040-809-A
Deactivation of the Thrust Reverser System for Ground Maintenance
TASK 78-30-00-440-809-A
Reactivation of the Thrust Reverser System after Ground Maintenance
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
F Left Modulated Turbine Cooling (MTC) Valve
3. Job Set-up
Subtask 75-23-00-941-053-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) Put WARNING NOTICE(S) 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) Put a WARNING NOTICE(S) in position to tell persons not to energize FADEC 1(2).
Subtask 75-23-00-010-056-A
B. Get Access
   (1) Open the fan cowl doors (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
   (2) Put an ACCESS PLATFORM 1M(3 FT) in position.
Subtask 75-23-00-040-053-A
C. Deactivation of the Thrust Reverser System 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) Do the deactivation of the thrust reverser system for ground maintenance (Ref. AMM TASK 78-30-00-040-809).
Subtask 75-23-00-010-057-A
D. Get Access
   (1) Open the left thrust-reverser cowl-door (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 75-23-00-020-051-A
A. Reactivation of the Left Modulated Turbine Cooling (MTC) Valve
F Left Modulated Turbine Cooling (MTC) Valve
   (1) Activate the left MTC valve (67) as follows: see the view D of the figure.
WARNING: USE PROTECTIVE GOGGLES AND GLOVES WHEN YOU REMOVE OR INSTALL LOCKWIRE. EACH TIME YOU CUT LOCKWIRE, REMOVE AND DISCARD IT IMMEDIATELY. LOOSE LOCKWIRE CAN CUT YOU OR MAKE YOU BLIND, AND/OR CAN CAUSE DAMAGE.
     (a) Cut and remove the safety cable from the bolt (68).
     (b) Remove the bolt (68) from the lock out position, see the view E of the figure.
     (c) Lubricate the threads of the bolt (68) and the threaded insert in the actuator clevis using CP2619Never Seez-Pure Nickel, Special.
     (d) Put the MTC valve link in position between the halves of the pushrod connector and align the bolts, see the view F of the figure.
     (e) Install the bolt (68) in the lockout bolt normal position, securing the pushrod connector to the MTC valve link, see the view G of the figure.
     (f) TORQUE the bolt (68) to between 30 and 25 lbf.in (0.34 and 0.28 m.daN ) T, see the view G of the figure.
     (g) Install CP8005lockwire 0.6 mm (0.0236 in.) dia or CP8006safety cable 0.032 in. (0.8 mm) dia. to the bolt (68) head and the hole located on the pushrod clevis.
5. Close-up
Subtask 75-23-00-410-056-A
A. Close Access
   (1) Make sure that the work area is clean and clear of tools and other items.
   (2) 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 75-23-00-440-053-A
B. Do the reactivation of the thrust reverser system after ground maintenance (Ref. AMM TASK 78-30-00-440-809).
Subtask 75-23-00-410-057-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 access platform(s).
   (3) Remove the WARNING NOTICE(S).
[Rev.10 from 2021] 2026.04.01 03:14:27 UTC
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