Adjustment of the Environmental Control System (ECS) Support Link

TASK 36-11-49-820-802-A
Adjustment of the Environmental Control System (ECS) Support Link

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.

ZONE: 450
ZONE: 460

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	COVER - PROTECTION
No specific	AR	SAFETY CLIP - CIRCUIT BREAKER
No specific	AR	WARNING NOTICE(S)
No specific	Torque wrench: range to between 126 and 114 lbf.in (1.42 and 1.29 m.daN )

B. Consumable Materials

REFERENCE	DESIGNATION
(Material No.CPNCL02145)	Wire - LOCKWIRE STAINLSS STL ANNEALED 0.8MM DIA
(Material No.CPNCL02150)	Lockwire A (AIA/NAS NASM20995C32)
(Material No.CPNCL02691)	LOCKWIRE (M50 TF 9 CI-A-DIA 0.8 mm (0.031 in.))
(Material No.CPNCL02774)	SAFETY CABLE KIT

C. Work Zones and Access Panels

ZONE/ACCESS	ZONE DESCRIPTION
450	ENG 1 THRUST REVERSER & EXHAUST SECTION
460	ENG 2 THRUST REVERSER & EXHAUST SECTION

D. Referenced Information

REFERENCE	DESIGNATION
TASK 36-11-49-000-827-A	Removal of the Environmental Control System (ECS) Ducts from the Engine Case Ports to the Pylon Connections
TASK 36-11-49-400-827-A	Installation of the Environmental Control System (ECS) Ducts from the Engine Case Ports to the Pylon Connections
TASK 78-30-00-040-807-A	Deactivation of the Thrust Reverser System for Nacelle Maintenance (ICU)
TASK 78-30-00-440-807-A	Reactivation of the Thrust Reverser System after Nacelle Maintenance (ICU)
Support Link
FOR [4020KM1] (POWER PLANT-DEMOUNTABLE, ENGINE 1)
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 78-36-00-010-806-A	Opening of the Thrust Reverser Cowl Doors
TASK 78-36-00-410-806-A	Closing of the Thrust Reverser Cowl Doors
FOR [4020KM2] (POWER PLANT-DEMOUNTABLE, ENGINE 2)
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 78-36-00-010-806-A	Opening of the Thrust Reverser Cowl Doors
TASK 78-36-00-410-806-A	Closing of the Thrust Reverser Cowl Doors

3. Job Set-up
Subtask 36-11-49-941-168-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 is in the OFF position for a minimum of five minutes before you do this procedure.
(c) Put the 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 the WARNING NOTICE(S) in position to tell persons not to energize the FADEC 1(2).

Subtask 36-11-49-865-267-A

B. Open, safety and tag this(these) circuit breaker(s):

PANEL	DESIGNATION	FIN	LOCATION
** ON A/C ALL
FOR FIN: 4020KM1 (POWER PLANTDEMOUNTABLE, ENGINE 1)
122VU	ANTI ICE/ENG/1	1DN1	X10
FOR FIN: 4020KM2 (POWER PLANTDEMOUNTABLE, ENGINE 2)
122VU	ANTI ICE/ENG/2	1DN2	W10

Subtask 36-11-49-010-335-A

C. Get Access
(1) Open the fan cowl doors:
(a) FOR [4020KM1] (POWER PLANT-DEMOUNTABLE, ENGINE 1)
437AL and 438AR (Ref. AMM TASK 71-13-00-010-803).
(b) FOR [4020KM2] (POWER PLANT-DEMOUNTABLE, ENGINE 2)
447AL and 448AR (Ref. AMM TASK 71-13-00-010-803).

Subtask 36-11-49-040-203-A

D. Deactivation of the Thrust Reverser (T/R) System for the Nacelle 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 T/R system for the nacelle maintenance (Ref. AMM TASK 78-30-00-040-807)

Subtask 36-11-49-010-336-A

E. Get Access
(1) Open the T/R cowl doors:
(a) FOR [4020KM1] (POWER PLANT-DEMOUNTABLE, ENGINE 1)
451AL and 452AR (Ref. AMM TASK 78-36-00-010-806).
(b) FOR [4020KM2] (POWER PLANT-DEMOUNTABLE, ENGINE 2)
461AL and 462AR (Ref. AMM TASK 78-36-00-010-806).
(2) Put an ACCESS PLATFORM 1M(3 FT) in position.
(3) Install the protection covers:

CAUTION: INSTALL PROTECTION COVERS ON ALL THE OPENINGS IMMEDIATELY TO PREVENT DAMAGE TO THE ENGINE.

(a) Install the COVER - PROTECTION in the correct position to prevent damage to the engine.

4. Procedure
Subtask 36-11-49-820-060-A

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. Adjustment of the ECS Support Link.

Support Link

NOTE: This procedure is applicable for the support links for which the adjustment is recommended, (Ref. AMM TASK 36-11-49-400-827).

(1) Remove the support link (Ref. AMM TASK 36-11-49-000-827).
(2) Remove and discard the safety cable (1).
(3) Loosen the support link locknut (2).
(4) Turn the support-link end shank (3) in increments of 180 deg (180 deg) to the necessary length:
(a) Turn the support-link end shank (3) not more than the maximum support link length. You can see two to five threads aft of the locknut and threads in the witness hole.
(5) TORQUE the locknut (2) to between 126 and 114 lbf.in (1.42 and 1.29 m.daN )

.
(6) Install the CPNCL02691LOCKWIRE (M50 TF 9 CI-A-DIA 0.8 mm (0.031 in.)) or CPNCL02150Lockwire A (AIA/NAS NASM20995C32) or SAFETY CABLE KIT (Material No.CPNCL02774) or Wire - LOCKWIRE STAINLSS STL ANNEALED 0.8MM DIA (Material No.CPNCL02145) in the locknut (2).
(7) Install the support link (Ref. AMM TASK 36-11-49-400-827).

5. Close-up
Subtask 36-11-49-410-247-A

A. Close Access
(1) Make sure that the work area is clean and clear of tools and other items.
(2) Remove the access platform(s).
(3) Close the T/R cowl doors:
(a) FOR [4020KM1] (POWER PLANT-DEMOUNTABLE, ENGINE 1)
451AL and 452AR (Ref. AMM TASK 78-36-00-410-806).
(b) FOR [4020KM2] (POWER PLANT-DEMOUNTABLE, ENGINE 2)
461AL and 462AR (Ref. AMM TASK 78-36-00-410-806).

Subtask 36-11-49-440-143-A

B. Reactivation of the T/R System after the Nacelle Maintenance
(1) Do the reactivation of the T/R system after the nacelle maintenance (Ref. AMM TASK 78-30-00-440-807).

Subtask 36-11-49-410-248-A

C. Close Access
(1) Close the fan cowl doors:
(a) FOR [4020KM1] (POWER PLANT-DEMOUNTABLE, ENGINE 1)
437AL and 438AR (Ref. AMM TASK 71-13-00-410-803).
(b) FOR [4020KM2] (POWER PLANT-DEMOUNTABLE, ENGINE 2)
447AL and 448AR (Ref. AMM TASK 71-13-00-410-803).
(2) Remove the WARNING NOTICE(S).

Subtask 36-11-49-865-268-A

D. Remove the safety clip(s) and the tag(s) and close this(these) circuit breaker(s):

PANEL	DESIGNATION	FIN	LOCATION
** ON A/C ALL
FOR FIN: 4020KM1 (POWER PLANTDEMOUNTABLE, ENGINE 1)
122VU	ANTI ICE/ENG/1	1DN1	X10
FOR FIN: 4020KM2 (POWER PLANTDEMOUNTABLE, ENGINE 2)
122VU	ANTI ICE/ENG/2	1DN2	W10

[Rev.10 from 2021] 2026.04.01 12:38:43 UTC