Installation of the IGGS Pallet

TASK 47-11-41-400-001-A
Installation of the IGGS Pallet

WARNING: PUT THE SAFETY DEVICES AND THE WARNING NOTICES IN POSITION BEFORE YOU START A TASK ON OR NEAR:

THE FLIGHT CONTROLS
THE FLIGHT CONTROL SURFACES
THE LANDING GEAR AND THE RELATED DOORS
COMPONENTS THAT MOVE.

MOVEMENT OF COMPONENTS CAN KILL OR CAUSE INJURY TO PERSONS AND/OR CAN CAUSE DAMAGE TO THE EQUIPMENT.

WARNING: BE CAREFUL WHEN YOU REMOVE OR INSTALL THIS EQUIPMENT. THIS EQUIPMENT IS HEAVY (MORE THAN 12 KG (26.5 lb)) AND CAN CAUSE INJURY AND/OR DAMAGE.

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

FIN: 8YA ** 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	Torque wrench: range to between 0.308 and 0.252 m.daN (27.26 and 22.30 lbf.in )
No specific	Torque wrench: range to between 0.36 and 0.27 m.daN (31.86 and 23.89 lbf.in )
No specific	Torque wrench: range to between 0.84 and 0.65 m.daN (74.34 and 57.52 lbf.in )
No specific	Torque wrench: range to between 5.3 and 5.2 m.daN (39.09 and 38.35 lbf.ft )
No specific	Torque wrench: range to between 9.5 and 7.9 m.daN (70.06 and 58.26 lbf.ft )
No specific	Torque wrench: range to between 15.5 and 12.9 m.daN (114.31 and 95.13 lbf.ft )
98D47103500000	1	PALLET INERTING RI

B. Consumable Materials

REFERENCE	DESIGNATION
(Material No.04TMB2)	Varnish-- Electrical Bonding Structure
(Material No.06AAA1)	Polysulfide Sealant_General Purpose Brushable -
(Material No.06AEA1)	Polysulfide Sealant-Low Adhesion Brushable -

C. Work Zones and Access Panels

ZONE/ACCESS	ZONE DESCRIPTION
191AB, 191BB

D. Referenced Information

REFERENCE	DESIGNATION
TASK 20-28-00-912-802-A	Electrical Bonding - General Maintenance Procedure
TASK 21-61-51-400-002-A	Installation of the Air Inlet
TASK 24-41-00-861-002-A	Energize the Aircraft Electrical Circuits from the External Power
TASK 24-41-00-861-002-A-01	Energize the Aircraft Electrical Circuits from the APU
TASK 24-41-00-861-002-A-02	Energize the Aircraft Electrical Circuits from Engine 1(2)
TASK 24-41-00-862-002-A	De-energize the Aircraft Electrical Circuits Supplied from the External Power
TASK 24-41-00-862-002-A-01	De-energize the Aircraft Electrical Circuits Supplied from the APU
TASK 24-41-00-862-002-A-02	De-energize the Aircraft Electrical Circuits Supplied from the Engine 1(2)
TASK 47-31-34-740-001-A	BITE Test of the IGGS with Bleed Air
TASK 47-31-34-740-001-A-01	BITE Test of the IGGS without Bleed Air
TASK 53-25-11-000-001-A	Removal of the Forward Belly Fairing Panels (191AT, 192AT, 191AB, 192AB)
TASK 53-25-11-400-001-A	Installation of Forward Belly Fairing Panels (191AT, 191AB, 192AT, 192AB)
TASK 53-35-13-000-002-A	Removal of the Quick-Release Access Panels from the Belly Fairing Structure
TASK 53-35-13-400-002-A	Installation of the Quick-Release Access Panels on the Belly Fairing Structure
Access Panel Location
Tie Rod and Bonding Connections
IGGS Pallet - Measurement and Adjustment Points
GSE-TOOL, Pallet Inerting
Air Duct Connections
Electrical Connectors

3. Job Set-up
Subtask 47-11-41-860-050-A ** ON A/C NOT FOR ALL

A. Aircraft Maintenance Configuration

Access Panel Location ** ON A/C NOT FOR ALL

(1) Make sure that the aircraft electrical circuits are energized (Ref. AMM TASK 24-41-00-861-002).
(2) Make sure that forward belly-fairing panel 191AB is removed (Ref. AMM TASK 53-25-11-000-001).
(3) Make sure that quick-release access panel 191BB is removed (Ref. AMM TASK 53-35-13-000-002).
(4) On the panel 30VU make sure that:
(a) The APU BLEED pushbutton switch is in the off position (the ON legend is off).
(b) The ENG 1 BLEED and the ENG 2 BLEED pushbutton switches are in the off position (the OFF legends are on).
(c) The warning notice to tell persons not to operate these pushbutton switches is in position.
(5) Make sure that the warning notice to tell persons not to supply the ground air is in position on the HP ground connector.

Subtask 47-11-41-865-051-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
49VU	AIR BLEED/X FEED/VALVE/BAT	2HV	D13
49VU	AIR COND/TEMP CTL/SYS 1 CHAN B/28VDC	52HH	D08
** ON A/C NOT FOR ALL
49VU	AIR BLEED/ENG 1/CTL	3HA1	D12
49VU	AIR BLEED/ENG 1/MONG	2HA1	D11
** ON A/C NOT FOR ALL
49VU	AIR BLEED/ENG 2/MONG	3HA2	D12
49VU	AIR BLEED/ENG 1/CTL	2HA1	D11
** ON A/C NOT FOR ALL
121VU	IGGS/CTRL	7YA	N28
** ON A/C NOT FOR ALL
121VU	IGGS/CTRL	7YA	P28
** ON A/C NOT FOR ALL
122VU	CSAS / CTRL	1HW	U17
122VU	AIR COND/TEMP CTL SYS 1/CHAN A/115VAC	49HH	X22
122VU	AIR COND/TEMP CTL SYS 1/CHAN A/28VDC	51HH	X21
122VU	AIR COND/TEMP CTL SYS 1/CHAN B/115VAC	50HH	Y18
122VU	AIR BLEED/X FEED VALVE/NORM	1HV	Z20
** ON A/C NOT FOR ALL
122VU	AIR BLEED/ENG 2/CTL	3HA2	Z23
122VU	AIR BLEED/ENG 2/MONG	2HA2	Z22
** ON A/C NOT FOR ALL
122VU	AIR BLEED/ENG 1/MONG	3HA1	Z23
122VU	AIR BLEED/ENG 2/CTL	2HA2	Z22

4. Procedure
Subtask 47-11-41-420-050-A ** ON A/C NOT FOR ALL

A. Installation of the IGGS Pallet

WARNING: SUPPORT THE UNIT/ASSEMBLY. THE UNIT/ASSEMBLY IS HEAVY. IF YOU DO NOT SUPPORT IT, IT WILL FALL. THIS CAN CAUSE INJURY TO PERSONS, AND/OR DAMAGE TO EQUIPMENT.

CAUTION: BE CAREFUL WHEN YOU TOUCH THIS ASSEMBLY. IT HAS PRECISION- TOLERANCE COMPONENTS WITH VERY POLISHED SURFACES. IF YOU ARE NOT CAREFUL, IT IS VERY EASY TO CAUSE DAMAGE TO THESE COMPONENTS (INTERNAL CONTAMINATION, EXTERNAL IMPACT DAMAGE).

(1) Do a check and adjust the tie rods (22), (21), (23), (20) and (19) to the correct length:

tie rod (22) length 141.5 -1 mm or +1 mm (5.5709 -0.0394 in. or +0.0394 in.)
tie rod (21) length 234.1 -1 mm or +1 mm (9.2165 -0.0394 in. or +0.0394 in.)
tie rod (23) length 258.7 -1 mm or +1 mm (10.1850 -0.0394 in. or +0.0394 in.)
tie rod (20) length 523.2 -1 mm or +1 mm (20.5984 -0.0394 in. or +0.0394 in.)
tie rod (19) length 554.5 -1 mm or +1 mm (21.8307 -0.0394 in. or +0.0394 in.)

(2) Prepare for electrical bonding the screw (43), the washer (42) and the bonding strap (39) (Ref. AMM TASK 20-28-00-912-802).
(3) Put the bonding strap (39) and the washer (42) in position, install and torque the screw (43) to between 0.36 and 0.27 m.daN (31.86 and 23.89 lbf.in )

.
(4) Prepare for electrical bonding the screw (47), the washer (48) and the bonding strap (44) (Ref. AMM TASK 20-28-00-912-802).
(5) Put the bonding strap (44) and the washer (48) in position, install and torque the screw (47) to between 0.84 and 0.65 m.daN (74.34 and 57.52 lbf.in )

.
(6) Put the tie rods (21) and (23) in position on the aircraft structure and install the clips (31).
(7) Put the tie rod (22) in position on the aircraft structure and install the bolt (30), the washers (29) and the nut (28).
(8) Get the half-shell 98D47103500044 (50) of the GSE-toolset and install it on the FR 34/35.7 for protection and support of the IGGS pallet.

WARNING: HEAVY WEIGHT. MINIMUM 2 PERSONS OR ASSISTED HANDLING REQUIRED.

(a) Safety the half-shell (50) with the attachment screw (51).

NOTE: The IGGS pallet weighs approx. 20.9 kg (46.0766 lb).

(9) Get another person and carefully move the IGGS pallet (25) to its installation position in the aircraft structure.
(a) Align and support the IGGS pallet (25) correctly on the half-shell (50) until the other person has installed the tie rods (21) and (23) to the IGGS pallet.
(10) Put the tie rods (21) and (23) in position on the IGGS pallet (25) and install the clips (31).
(11) Put the tie rods (15), (18), (17) and (26) in position on the aircraft structure and install the bolts (32),
if fitted the washers (33), if fitted the bushings (34),
the washers (35) and the nuts (36).
(12) Install the air inlet (27) (Ref. AMM TASK 21-61-51-400-002).
(13) Install the bracket (16) at the attachment points at the lower end of tie rod (17), (18) and the air inlet (27).
(a) Apply Polysulfide Sealant-Low Adhesion Brushable - (Material No.06AEA1) between the contact surfaces of the bracket and the pallet.
(b) Get another person and support the IGGS pallet carefully to align the screw holes of the pallet to the bracket (16). Install the 4 screws (37) and the 4 washers (38).
(c) TORQUE the screws (37) to between 0.36 and 0.27 m.daN (31.86 and 23.89 lbf.in )

.
(14) Remove the half-shell (50) from FR 34/35.7.

(15) Do a check of the clearance between the IGGS pallet and the aircraft structure.

IGGS Pallet - Measurement and Adjustment Points ** ON A/C NOT FOR ALL

(a) Adjust the tie rod (23) and make sure that there is a distance S3 of 31 +2 mm or -2 mm (1.2205 +0.0787 in. or -0.0787 in.) between the IGGS pallet and the belly fairing structure at FR 34/35.7.
(b) Adjust the tie rod (21) and make sure that:
1 There is a minimum distance S4 of 25 mm (0.9843 in.) between the IGGS pallet and frame C30/C33/C35.6.
2 There is a minimum distance S6 of 25 mm (0.9843 in.) between the equipment 6YA of the IGGS pallet and the inner side of the belly fairing panel.

Subtask 47-11-41-480-050-A ** ON A/C NOT FOR ALL

B. Installation of the GSE-tool 98D47103500000 PALLET INERTING RI and final adjustment.

GSE-TOOL, Pallet Inerting ** ON A/C NOT FOR ALL

(1) Install the cross beam assembly 98D47103500042 (52) on the attachment points of the access panel 191AB between FR 30/33/35.6 and FR 34/35.7.
(2) Install the actuator assembly 98D47103500040 (53) on the cross beam assembly.

NOTE: The stop of the actuator points vertical up to the rod end bearing (24).

(3) Do the final alignment of the IGGS pallet with the actuator assembly (53).
(a) Extend the shaft of the actuator until the stop touches the rod end bearing (24). Refer to detail B.
(b) Apply smoothly a force of 6.1 +0.5 daN or -0.5 daN (13.7133 +1.1240 lbf or -1.1240 lbf) to the rod end bearing (24).

NOTE: The actuator must be engaged until the installation of the final tie rod (22) is completed.

(4) Adjust the length of the tie rod (22) and attach the rod without stress in position on the pallet. Install the clip (31). Refer to view C.

(5) Release the tension from the actuator and remove the actuator assembly (53).
(6) Remove the cross beam assembly (52).
(7) Make sure that there is a distance S5 of 16 +2 mm or -2 mm (0.6299 +0.0787 in. or -0.0787 in.) between the bracket (16) and the tie rods (17) and (18).
(8) Put the tie rods (19) and (20) without stress in position on the aircraft structure and the IGGS pallet and install the clips (31).
(9) Make sure that there is a minimum distance S1 and S2 of 25 mm (0.9843 in.) between the bracket (16) and the tie rods (17) and (18).

Subtask 47-11-41-420-051-A ** ON A/C NOT FOR ALL

C. Installation of the Air Duct Connections and electrical Bonding
(1) Install the air duct connections.

Air Duct Connections ** ON A/C NOT FOR ALL

(a) Install the bellow (7) and the clamps (6) and (8).
(b) TORQUE the clamps (6) and (8) to between 0.308 and 0.252 m.daN (27.26 and 22.30 lbf.in )

.
(c) Install the flexible hose (10).
(d) TORQUE the connectors (9) and (11) to between 5.3 and 5.2 m.daN (39.09 and 38.35 lbf.ft )

.
(e) Install the flexible hose (13).
(f) TORQUE the connector (12) to between 15.5 and 12.9 m.daN (114.31 and 95.13 lbf.ft )

.
(g) TORQUE the connector (14) to between 9.5 and 7.9 m.daN (70.06 and 58.26 lbf.ft )

.
(2) Make sure that there is a minimum distance of 25 mm (0.9843 in.) between all components and equipments of the IGGS pallet and the inner side of the belly fairing panels.
(3) Prepare the screw (41), the washer (40) and the bonding strap (39) for electrical bonding (Ref. AMM TASK 20-28-00-912-802).
(4) Put the bonding strap (39) in position and install the screw (41) and the washer (40).
(5) Prepare the screw (46), the washer (45) and the bonding strap (44) for electrical bonding (Ref. AMM TASK 20-28-00-912-802).
(6) Put the bonding strap (44) in position and install the screw (46) and the washer (45).
(7) Apply Polysulfide Sealant_General Purpose Brushable - (Material No.06AAA1) to the screw heads (41), (43), (46), (47) and the washers (40), (42), (45), (48), and let it dry.
(8) Apply Varnish-- Electrical Bonding Structure (Material No.04TMB2) to the screw heads (41), (43), (46), (47) , and let it dry.
(9) Do a check of the maximum bonding value

between the IGGS pallet (25) and the primary metal structure of the fuselage.
Make sure that the maximum bonding value is not more than 20 milliohms.

CAUTION: MAKE SURE THAT THE BONDING STRAP(S) IS(ARE) CONNECTED BEFORE YOU CONNECT THE ELECTRICAL CONNECTOR(S).

(10) Install the electrical connectors.

Electrical Connectors ** ON A/C NOT FOR ALL

(a) Remove the CAP-BLANKING from each electrical connector and receptacle.
(b) Make sure that all the electrical connections are clean and in the correct condition.
(c) Connect the electrical connectors (1), (2), (3), (4) and (5).

Subtask 47-11-41-865-052-A ** ON A/C NOT FOR ALL

D. 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
49VU	AIR BLEED/X FEED/VALVE/BAT	2HV	D13
49VU	AIR COND/TEMP CTL/SYS 1 CHAN B/28VDC	52HH	D08
** ON A/C NOT FOR ALL
49VU	AIR BLEED/ENG 1/CTL	3HA1	D12
49VU	AIR BLEED/ENG 1/MONG	2HA1	D11
** ON A/C NOT FOR ALL
49VU	AIR BLEED/ENG 2/MONG	3HA2	D12
49VU	AIR BLEED/ENG 1/CTL	2HA1	D11
** ON A/C NOT FOR ALL
121VU	IGGS/CTRL	7YA	N28
** ON A/C NOT FOR ALL
121VU	IGGS/CTRL	7YA	P28
** ON A/C NOT FOR ALL
122VU	CSAS / CTRL	1HW	U17
122VU	AIR COND/TEMP CTL SYS 1/CHAN A/115VAC	49HH	X22
122VU	AIR COND/TEMP CTL SYS 1/CHAN A/28VDC	51HH	X21
122VU	AIR COND/TEMP CTL SYS 1/CHAN B/115VAC	50HH	Y18
122VU	AIR BLEED/X FEED VALVE/NORM	1HV	Z20
** ON A/C NOT FOR ALL
122VU	AIR BLEED/ENG 2/CTL	3HA2	Z23
122VU	AIR BLEED/ENG 2/MONG	2HA2	Z22
** ON A/C NOT FOR ALL
122VU	AIR BLEED/ENG 1/MONG	3HA1	Z23
122VU	AIR BLEED/ENG 2/CTL	2HA2	Z22

Subtask 47-11-41-710-050-A ** ON A/C NOT FOR ALL

E. Leak Test

WARNING: YOU MUST WEAR SAFETY BREATHING EQUIPMENT WHEN YOU DO WORK IN THIS AREA. THIS AREA CAN CONTAIN AIR FROM THE TANK INERTING SYSTEM. AIR FROM THIS SYSTEM HAS A LOW-OXYGEN CONTENT AND CAN CAUSE INJURY AND DEATH.

(1) Do the two subsequent steps at the same time.

NOTE: Two persons are necessary to do these steps.

(a) Do the BITE Test of the IGGS with Bleed Air (Ref. AMM TASK 47-31-34-740-001).
(b) Examine the joints of the bellow (7), the flexible hose (10) and the flexible hose (13) for signs of air leakage.
(2) If necessary, repair the leaks.

5. Close-up
Subtask 47-11-41-410-050-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) Install forward belly-fairing panel 191AB (Ref. AMM TASK 53-25-11-400-001).
(3) Install quick-release access panel 191BB (Ref. AMM TASK 53-35-13-400-002).

Subtask 47-11-41-862-050-A ** ON A/C NOT FOR ALL

B. De-energize the aircraft electrical circuits (Ref. AMM TASK 24-41-00-862-002).

[Rev.10 from 2021] 2026.04.02 06:26:18 UTC