Adjustment of the Nacelle Anti-Icing Support Link

TASK 30-21-49-820-012-A
Adjustment of the Nacelle Anti-Icing 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: YOU MUST FIND AND OBEY THE MANUFACTURER'S HEALTH AND SAFETY DATA FOR THE MATERIAL (MSDS). YOU MUST ALSO REFER TO LOCAL REGULATIONS TO MAKE SURE THAT YOU DO THE PROCEDURES SAFELY. IF YOU DO NOT DO THIS, INJURY TO PERSONS OR ENVIRONMENTAL DAMAGE CAN OCCUR.

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	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 0.8 mm (0.031 in.) 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 AS3510-0218K

C. Work Zones and Access Panels

ZONE/ACCESS	ZONE DESCRIPTION
FOR [4020KM1] (POWER PLANT-DEMOUNTABLE, ENGINE 1)
437AL, 438AR, 451AL, 452AR
FOR [4020KM2] (POWER PLANT-DEMOUNTABLE, ENGINE 2)
447AL, 448AR, 461AL, 462AR

D. Referenced Information

REFERENCE	DESIGNATION
TASK 30-21-49-000-808-A	Removal of the Anti-Ice Ducts and Insulation Blankets
TASK 30-21-49-400-808-A	Installation of the Anti-Ice Ducts and Insulation Blankets
TASK 30-21-51-400-805-A	Installation of the FWD Air-Intake Anti-Ice Valve (PRSOV2)
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 78-30-00-040-807-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)
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
Support Link

3. Job Set-up
Subtask 30-21-49-941-124-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 for not less than five minutes before you do this procedure.
(c) Make sure that the WARNING NOTICE(S) is(are) in position to tell persons not to operate:

The ENG/MODE selector switch, and
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) Make sure that the WARNING NOTICE(S) is(are) in position to tell persons not to energize the FADEC 1(2).

Subtask 30-21-49-865-136-A

B. Make sure that this(these) circuit breaker(s) is(are) open, safetied and tagged:

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 30-21-49-010-181-A

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

Subtask 30-21-49-040-105-A

D. Deactivation of the Thrust Reverser System for 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) Make sure that you do the deactivation of the thrust reverser system for nacelle maintenance (Ref. AMM TASK 78-30-00-040-807).

Subtask 30-21-49-010-182-A

E. Get Access
(1) Make sure that the thrust reverser cowl-doors are open (Ref. AMM TASK 78-36-00-010-806):
(a) FOR [4020KM1] (POWER PLANT-DEMOUNTABLE, ENGINE 1)
451AL and 452AR.
(b) FOR [4020KM2] (POWER PLANT-DEMOUNTABLE, ENGINE 2)
461AL and 462AR.
(2) Make sure that the ACCESS PLATFORM 1M(3 FT) is in position.
(3) Installation of the protection covers:

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

(a) Make sure that the COVER - PROTECTION are in position to prevent damage to the engine.

4. Procedure
Subtask 30-21-49-820-062-A

A. Adjustment of the Anti-Ice Duct Support Link

Support Link

NOTE: This procedure is applicable for the support links where the adjustment is necessary in (Ref. AMM TASK 30-21-49-400-808) or (Ref. AMM TASK 30-21-51-400-805).

(1) Remove the support link that is necessary for adjustment (Ref. AMM TASK 30-21-49-000-808).
(2) Remove the safety cable (1) and discard it.
(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. Make sure that:
(a) The length of the support link is not more than the maximum limit.
(b) You can see two to five threads after the locknut.
(c) You can see the 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 AS3510-0218K (Material No.CPNCL02774) or CPNCL02145Wire - LOCKWIRE STAINLSS STL ANNEALED 0.8 mm (0.031 in.) DIA.
(7) Install the support link (Ref. AMM TASK 30-21-49-400-808).

5. Close-up
Subtask 30-21-49-410-151-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 thrust reverser cowl-doors (Ref. AMM TASK 78-36-00-410-806):
(a) FOR [4020KM1] (POWER PLANT-DEMOUNTABLE, ENGINE 1)
451AL and 452AR.
(b) FOR [4020KM2] (POWER PLANT-DEMOUNTABLE, ENGINE 2)
461AL and 462AR.

Subtask 30-21-49-440-086-A

B. Reactivation of the Thrust Reverser System after Ground Maintenance
(1) Do the reactivation of the thrust reverser system after ground maintenance (Ref. AMM TASK 78-30-00-440-807).

Subtask 30-21-49-410-152-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 and 438AR.
(b) FOR [4020KM2] (POWER PLANT-DEMOUNTABLE, ENGINE 2)
447AL and 448AR.
(2) Remove the WARNING NOTICE(S).

Subtask 30-21-49-865-137-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 00:29:59 UTC