DOC AIRBUS | AMM A320FManual Operation of the Left Modulated Turbine Cooling Valve [CFML]
TASK 75-23-10-910-801-A
Manual Operation of the Left Modulated Turbine Cooling Valve
Self explanatory
2. Job Set-up Information
A. Fixtures, Tools, Test and Support Equipment
B. Consumable Materials
C. Work Zones and Access Panels
D. Referenced Information
3. Job Set-up
Subtask 75-23-10-941-060-A
Subtask 75-23-10-980-050-A
Subtask 75-23-10-410-066-A
[Rev.10 from 2021]
2026.04.01 03:14:32 UTC
Manual Operation of the Left Modulated Turbine Cooling 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 JobSelf 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 30 and 25 lbf.in (0.34 and 0.28 m.daN )  |
| REFERENCE | DESIGNATION |
|---|---|
| (Material No.CP2619) | Nickel never-seez |
| (Material No.CP8005) | Safetywire 0.024 in. (0.6 mm) |
| (Material No.CP8006) | Safety cable 0.032 in. (0.8 mm) |
| ZONE/ACCESS | ZONE DESCRIPTION |
|---|---|
| 210 | CKPT,FWD COMPT BHD TO FLT COMPT BULKHEAD |
| 400 | POWER PLANT, NACELLES AND PYLONS |
| FOR [4020KM1] (POWER PLANT-DEMOUNTABLE, ENGINE 1) | |
| 437AL, 438AR, 451AL, 452AR | |
| FOR [4020KM2] (POWER PLANT-DEMOUNTABLE, ENGINE 2) | |
| 447AL, 448AR, 461AL, 462AR | |
| 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 75-23-00-040-801-A | Deactivation of the Left Modulated Turbine Cooling (MTC) Valve |
| TASK 75-23-10-000-802-A | Removal of the Left Modulated Turbine Cooling Valve |
| TASK 75-23-10-400-802-A | Installation of the Left Modulated Turbine Cooling Valve |
| 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 |
Left Modulated Turbine Cooling ValveSubtask 75-23-10-941-060-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 a WARNING NOTICE(S) in position to tell persons not to operate:
(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 75-23-10-010-073-A (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 a WARNING NOTICE(S) in position to tell persons not to operate:
- The ENG/MODE selector switch
- The ENG/MASTER 1(2) control switch.
(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).
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
Subtask 75-23-10-040-063-A (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
C. Deactivation of the Thrust Reverser System for Maintenance
Subtask 75-23-10-010-074-A 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). D. Get Access
(1) Open the thrust reverser cowl-doors (Ref. AMM TASK 78-36-00-010-806):
(a) FOR [4020KM1] (POWER PLANT-DEMOUNTABLE, ENGINE 1)
451AL 452AR
(b) FOR [4020KM2] (POWER PLANT-DEMOUNTABLE, ENGINE 2)
461AL 462AR
4. Procedure(1) Open the thrust reverser cowl-doors (Ref. AMM TASK 78-36-00-010-806):
(a) FOR [4020KM1] (POWER PLANT-DEMOUNTABLE, ENGINE 1)
451AL 452AR
(b) FOR [4020KM2] (POWER PLANT-DEMOUNTABLE, ENGINE 2)
461AL 462AR
Subtask 75-23-10-980-050-A
A. Manual Operation of the Left Modulated Turbine Cooling Valve
CP8005 Safetywire 0.024 in. (0.6 mm) CP8006 Safety cable 0.032 in. (0.8 mm)
2 Move the left modulated turbine cooling valve (67) actuating arm to align the modulated turbine cooling valve link with the holes in the modulated turbine cooling valve pushrod connector.
3 Apply Nickel never-seez (Material No.CP2619) on the threads of the bolt (68) and the threads of the modulated turbine cooling actuator clevis thread insert.
4 Install the bolt (68) in the bolt normal position threaded insert on the left modulated turbine cooling valve (67).
5 TORQUE the bolt (68) to between 30 and 25 lbf.in (0.34 and 0.28 m.daN ).
6 InstallCP8005 Safetywire 0.024 in. (0.6 mm) CP8006 Safety cable 0.032 in. (0.8 mm)
(b) Remove the bolt and the nut that attach the left modulated turbine cooling valve (67) and clevis to the left modulated turbine cooling actuator (Ref. AMM TASK 75-23-10-000-802).
(c) Manually operate the left modulated turbine cooling valve (67) through its full range by moving the operating lever by hand.
1 If the left modulated turbine cooling valve (67) fails the manual actuation check:
a Either lock it out (Ref. AMM TASK 75-23-00-040-801) or
b Replace it (Ref. AMM TASK 75-23-10-000-802) and (Ref. AMM TASK 75-23-10-400-802).
(d) Install and torque the bolt and the nut that attach the left modulated turbine cooling valve (67) and clevis to the left modulated turbine cooling actuator rod end (Ref. AMM TASK 75-23-10-400-802).
5. Close-upNOTE: The manual operation of the left modulated turbine cooling valve (67) will determine if the left modulated turbine cooling valve (67) is serviceable.
(1) Manually actuate the left modulated turbine cooling valve (67) as follows: WARNING:
USE PROTECTIVE GOGGLES AND GLOVES WHEN YOU REMOVE OR INSTALL SAFETYWIRE. EACH TIME YOU CUT SAFETYWIRE, REMOVE AND DISCARD IT IMMEDIATELY. LOOSE SAFETYWIRE CAN CUT YOU OR MAKE YOU BLIND, AND/OR CAN CAUSE DAMAGE.
WARNING:
USE GOGGLES WHEN YOU REMOVE OR INSTALL SAFETY CABLE. EACH TIME YOU CUT SAFETY CABLE, REMOVE AND DISCARD IT IMMEDIATELY. LOOSE SAFETY CABLE CAN CUT YOU OR MAKE YOU BLIND, AND/OR CAN CAUSE DAMAGE TO THE EQUIPMENT.
(a) Do a check of the bolt (68) of the left modulated turbine cooling valve (67): - If the bolt (68) is installed in the bolt normal position, go to Para. 4.A.(1)(b).
- If the bolt (68) is installed in the lockout position, do the steps that follow:
2 Move the left modulated turbine cooling valve (67) actuating arm to align the modulated turbine cooling valve link with the holes in the modulated turbine cooling valve pushrod connector.
3 Apply Nickel never-seez (Material No.CP2619) on the threads of the bolt (68) and the threads of the modulated turbine cooling actuator clevis thread insert.
4 Install the bolt (68) in the bolt normal position threaded insert on the left modulated turbine cooling valve (67).
5 TORQUE the bolt (68) to between 30 and 25 lbf.in (0.34 and 0.28 m.daN )
. 6 Install
(b) Remove the bolt and the nut that attach the left modulated turbine cooling valve (67) and clevis to the left modulated turbine cooling actuator (Ref. AMM TASK 75-23-10-000-802).
(c) Manually operate the left modulated turbine cooling valve (67) through its full range by moving the operating lever by hand.
1 If the left modulated turbine cooling valve (67) fails the manual actuation check:
a Either lock it out (Ref. AMM TASK 75-23-00-040-801) or
b Replace it (Ref. AMM TASK 75-23-10-000-802) and (Ref. AMM TASK 75-23-10-400-802).
(d) Install and torque the bolt and the nut that attach the left modulated turbine cooling valve (67) and clevis to the left modulated turbine cooling actuator rod end (Ref. AMM TASK 75-23-10-400-802).
Subtask 75-23-10-410-066-A
A. Close Access
(1) Make sure that the work area is clean and clear of tools and other items.
(2) Close the thrust reverser cowl-doors (Ref. AMM TASK 78-36-00-410-806):
(a) FOR [4020KM1] (POWER PLANT-DEMOUNTABLE, ENGINE 1)
451AL 452AR
(b) FOR [4020KM2] (POWER PLANT-DEMOUNTABLE, ENGINE 2)
461AL 462AR
Subtask 75-23-10-440-058-A (1) Make sure that the work area is clean and clear of tools and other items.
(2) Close the thrust reverser cowl-doors (Ref. AMM TASK 78-36-00-410-806):
(a) FOR [4020KM1] (POWER PLANT-DEMOUNTABLE, ENGINE 1)
451AL 452AR
(b) FOR [4020KM2] (POWER PLANT-DEMOUNTABLE, ENGINE 2)
461AL 462AR
B. Do the reactivation of the thrust reverser system after ground maintenance (Ref. AMM TASK 78-30-00-440-809).
Subtask 75-23-10-410-067-A