Installation of the FWD LH Tie -Rods and Vibration Isolator (131-9(A))

TASK 49-12-51-400-003-A
Installation of the FWD LH Tie -Rods and Vibration Isolator (131-9(A))

WARNING: BE CAREFUL WHEN YOU USE CONSUMABLE MATERIALS. OBEY THE MATERIAL MANUFACTURER'S INSTRUCTIONS AND YOUR LOCAL REGULATIONS.

FIN: 4035KM ** ON A/C NOT FOR ALL

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 4M (13 FT)-ADJUSTABLE
No specific	AR	BRUSH - BRISTLED, FIBER, MEDIUM
No specific	Torque wrench: range to between 0.26 and 0.22 m.daN (23.01 and 19.47 lbf.in )
No specific	Torque wrench: range to between 0.35 and 0.3 m.daN (30.97 and 26.55 lbf.in )
No specific	Torque wrench: range to between 0.75 and 0.55 m.daN (66.37 and 48.67 lbf.in )
No specific	Torque wrench: range to between 3.1 and 2.5 m.daN (22.86 and 18.44 lbf.ft )
98A49107504001	1	PROTECTOR-THREADS,APU MOUNTING BOLTS

B. Consumable Materials

REFERENCE	DESIGNATION
(Material No.06LCG9)	Non Hardening Jointing Putty-Medium Temp. Area - -
(Material No.06LDG2)	Non Hardening Jointing Putty-High Temp. Area - Structure
(Material No.08ABC1)	Aqueous Cleaner-Aircraft Exterior Pressure Spraying -
(Material No.12ABE2)	Corrosion Preventive Compound-Water Displacing Oily Film System

C. Work Zones and Access Panels

ZONE/ACCESS	ZONE DESCRIPTION
315AL, 316AR

D. Expendable Parts

FIG.ITEM	DESIGNATION	IPC-CSN
1	COTTER PINS	AIPC 49-12-04-02-110
18	COTTER PIN	AIPC 49-12-04-02-110
7	COTTER PINS	AIPC 49-12-04-02-120
1	COTTER PIN	AIPC 49-12-84-41-070
18	COTTER PIN	AIPC 49-12-84-41-070
7	COTTER PINS	AIPC 49-12-84-41-080

E. Referenced Information

REFERENCE	DESIGNATION
TASK 20-28-00-912-802-A	Electrical Bonding - General Maintenance Procedure
TASK 24-42-00-861-001-A	Energize the Ground Service Network from the External Power
TASK 24-42-00-862-001-A	De-energize the Ground Service Network Supplied from the External Power
TASK 29-00-00-864-001-A	Put the Related Hydraulic System in the Depressurized Configuration before Maintenance Action
TASK 49-00-00-080-003-A	Removal of the APU Hoist Tool
TASK 52-41-00-010-001-A	Open the APU Doors for Access
TASK 52-41-00-410-001-A	Close the APU Doors after Access
TASK 52-41-21-000-001-A	Removal of APU Access Door 315AL
TASK 52-41-22-000-001-A	Removal of the APU Access Door and the related Door Mechanism
FWD LH Tie-Rods and Vibration Isolator ** ON A/C NOT FOR ALL
FWD LH Tie-Rods and Vibration Isolator ** ON A/C NOT FOR ALL

3. Job Set-up
Subtask 49-12-51-860-058-A ** ON A/C NOT FOR ALL

A. Aircraft Maintenance Configuration
(1) Energize the ground service network
(Ref. AMM TASK 24-42-00-861-001).
(2) On the panel 25VU make sure that the APU MASTER SW p/bsw is OFF.
(3) Make sure that the warning notices is on panel 25VU to tell persons not to start the APU.
(4) Make sure that the hydraulic systems are depressurized
(Ref. AMM TASK 29-00-00-864-001).
(5) Make sure that the ACCESS PLATFORM 4M (13 FT)-ADJUSTABLE is in position below the access doors 315AL and 316AR.
(6) Make sure that the APU access doors 315AL, 316AR are open (Ref. AMM TASK 52-41-00-010-001) or removed (Ref. AMM TASK 52-41-21-000-001) and (Ref. AMM TASK 52-41-22-000-001).
(7) Make sure that the LIGHT SW 11LJ is set to the ON position.

Subtask 49-12-51-865-057-A ** ON A/C NOT FOR ALL

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

PANEL	DESIGNATION	FIN	LOCATION
** ON A/C NOT FOR ALL
121VU	APU/APU/CTL	2KD	L42
121VU	APU/ECB/SPLY	1KD	L41

4. Procedure
Subtask 49-12-51-210-055-A ** ON A/C NOT FOR ALL

A. Preparation for Installation
(1) Clean the tie-rods (5), (10) and (11) and the vibration isolator (12) with solvent Aqueous Cleaner-Aircraft Exterior Pressure Spraying - (Material No.08ABC1) and a BRUSH - BRISTLED, FIBER, MEDIUM.
(2) Do a check and make sure that the tie-rods (5), (10) and (11) are in correct condition.
(3) If the tie-rods and/or the vibration isolator are damaged, replace them if necessary.
(4) Clean and examine the attachment brackets, the APU mount-bracket (14) and the structure for damage and replace if necessary.

Subtask 49-12-51-420-056-A ** ON A/C NOT FOR ALL

B. Installation of the Vibration Isolator

CAUTION: WHEN YOU REMOVE (INSTALL) THE APU, DISENGAGE (ENGAGE) ALL THE VIBRATION ISOLATORS AT THE SAME TIME FROM THE APU MOUNT BRACKETS. IF YOU DISENGAGE (ENGAGE) THEM ONE AFTER THE OTHER, THE LOADS WILL NOT BE EQUAL. THIS WILL CAUSE DAMAGE TO THE TIE RODS.

(1) Apply Non Hardening Jointing Putty-Medium Temp. Area - - (Material No.06LCG9) or Non Hardening Jointing Putty-High Temp. Area - Structure (Material No.06LDG2) to all mating surfaces. Do not apply it to the bonding straps.
(2) If removed, install the tie-rods (5), (10) and (11).
(a) Install the bolts (15), the washers (16) and the castle nuts (17).
(b) TORQUE the castle nuts (17) to between 0.75 and 0.55 m.daN (66.37 and 48.67 lbf.in )

and safety them with the new AIPC 49-12-04-02-110 COTTER PIN (18).
(c) Connect the bonding strap at the bonding bracket (Ref. AMM TASK 20-28-00-912-802).
(d) Install the screws (22), the washers (21) and the nuts (19).
(e) TORQUE the nuts (19) to between 0.26 and 0.22 m.daN (23.01 and 19.47 lbf.in )

.
(3) Install the vibration isolator (12) on the APU mount-bracket (14).
(4) Install the tie-rods (5), (10) and (11) at the vibration isolator (12).
(5) Install the bolts (4) and (9), the washers (3) and (8) and the castle nuts (2) and (6).
(6) TORQUE the castle nuts (6) to between 0.35 and 0.3 m.daN (30.97 and 26.55 lbf.in )

and safety them with the new AIPC 49-12-04-02-120 COTTER PINS (7).
(7) TORQUE the castle nut (2) to between 0.75 and 0.55 m.daN (66.37 and 48.67 lbf.in )

and safety them with the new AIPC 49-12-04-02-110 COTTER PINS (1).
(8) Remove the 98A49107504001 PROTECTOR-THREADS,APU MOUNTING BOLTS and install the nut (13).
(9) TORQUE the nut (13) to between 3.1 and 2.5 m.daN (22.86 and 18.44 lbf.ft )

(10) Put a mark on the nut (13) with red locking varnish to identify the torqued position.

Subtask 49-12-51-420-056-B ** ON A/C NOT FOR ALL

B. Installation of the Vibration Isolator

(1) Protective Treatment
(a) Apply Non Hardening Jointing Putty-Medium Temp. Area - - (Material No.06LCG9) or Non Hardening Jointing Putty-High Temp. Area - Structure (Material No.06LDG2) to all mating surfaces. Do not apply it to the bonding straps.
(2) If removed, install the tie-rods (5), (10) and (11).
(a) Install the tie-rods (5), (10) and (11) at the brackets.
(b) Install the bolts (15), the washers (16) and the castle nuts (17).
(c) Tighten and TORQUE the castle nuts (17) to between to between 0.75 and 0.55 m.daN (66.37 and 48.67 lbf.in )

and safety them with the new AIPC 49-12-04-02-110 COTTER PIN (18) or AIPC 49-12-84-41-070 COTTER PIN (18).
(d) Connect the bonding strap (20) at bonding bracket (Ref. AMM TASK 20-28-00-912-802).
(e) Install the clamps (27) and (28) at the tie-rod (11) with the screws (26), the washers (25) and the nuts (23).
(f) Install the screws (22), the washers (21) and the nuts (19).
(g) Tighten and TORQUE the nuts (19) to between to between 0.26 and 0.22 m.daN (23.01 and 19.47 lbf.in )

.
(3) Install the vibration isolator 4035KM (12) on the APU mount-bracket (14).
(4) Install the tie-rods (5), (10) and (11) at the vibration isolator (12).
(5) Install the bolts (4), and (9), the washers (3) and (8) and the castle nuts (2), and (6).
(6) Tighten and TORQUE the castle nuts (6) to between 0.35 and 0.3 m.daN (30.97 and 26.55 lbf.in )

and safety them with the new AIPC 49-12-04-02-120 COTTER PINS (7) or AIPC 49-12-84-41-080 COTTER PINS (7).
(7) Tighten and TORQUE the castle nut (2) to between 0.75 and 0.55 m.daN (66.37 and 48.67 lbf.in )

and safety them with the new AIPC 49-12-04-02-110 COTTER PINS (1). or AIPC 49-12-84-41-070 COTTER PIN (1).
(8) Remove the 98A49107504001 PROTECTOR-THREADS,APU MOUNTING BOLTS and install the nut (13).
(9) Tighten and TORQUE the nut (13) to between 3.1 and 2.5 m.daN (22.86 and 18.44 lbf.ft )

(10) Put a mark on the nut (13) with red locking varnish to identify the torqued position.

Subtask 49-12-51-420-056-C ** ON A/C NOT FOR ALL

B. Installation of the Vibration Isolator

(1) Protective Treatment
(a) Apply Non Hardening Jointing Putty-High Temp. Area - Structure (Material No.06LDG2) to all mating surfaces. Do not apply it to the bonding straps.
(2) If removed, install the tie-rods (5), (10) and (11).
(a) Install the tie-rods (5), (10) and (11) at the brackets.
(b) Install the bolts (15), the washers (16) and the castle nuts (17).
(c) Tighten and TORQUE the castle nuts (17) to between to between 0.75 and 0.55 m.daN (66.37 and 48.67 lbf.in )

and safety them with the new AIPC 49-12-04-02-110 COTTER PINS (1) or AIPC 49-12-84-41-070 COTTER PIN (1).
(8) Remove the 98A49107504001 PROTECTOR-THREADS,APU MOUNTING BOLTS and install the nut (13).
(9) Tighten and TORQUE the nut (13) to between 3.1 and 2.5 m.daN (22.86 and 18.44 lbf.ft )

(10) Put a mark on the nut (13) with red locking varnish to identify the torqued position.

Subtask 49-12-51-080-052-A ** ON A/C NOT FOR ALL

C. Remove the APU hoist (Ref. AMM TASK 49-00-00-080-003).

Subtask 49-12-51-420-057-A ** ON A/C NOT FOR ALL

D. Apply a thin layer of Corrosion Preventive Compound-Water Displacing Oily Film System (Material No.12ABE2) to the vibration isolator (12), the tie-rod, the suspension structural brackets and the APU mount-bracket.

5. Close-up
Subtask 49-12-51-410-052-A ** ON A/C NOT FOR ALL

A. Close Access
(1) Make sure that the work area is clean and clear of tools and other items.
(2) Set the LIGHT SW 11LJ to the OFF position.
(3) Close the APU access doors 316AR 315AL (Ref. AMM TASK 52-41-00-410-001) .
(4) Remove the access platform(s).

Subtask 49-12-51-865-058-A ** ON A/C NOT FOR ALL

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

PANEL	DESIGNATION	FIN	LOCATION
** ON A/C NOT FOR ALL
121VU	APU/APU/CTL	2KD	L42
121VU	APU/ECB/SPLY	1KD	L41

Subtask 49-12-51-860-059-A ** ON A/C NOT FOR ALL

C. Aircraft Maintenance Configuration.
(1) Put the related hydraulic system in the pressurized configuration (Ref. AMM TASK 29-00-00-864-001).
(2) De-energize the ground service network
(Ref. AMM TASK 24-42-00-862-001).
(3) Remove the ground support and maintenance equipment, the special and standard tools and all other items.
(4) Remove the WARNING NOTICE(S).

[Rev.10 from 2021] 2026.04.01 01:27:05 UTC