Installation of the Fuel Pump Fairings

TASK 28-21-49-400-001-A
Installation of the Fuel Pump Fairings

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: MAKE SURE THAT THE GROUND SAFETY-LOCKS ARE IN POSITION ON THE LANDING GEAR. THIS WILL PREVENT UNWANTED MOVEMENT OF THE LANDING GEAR, AND THUS POSSIBLE INJURY TO PERSONS AND DAMAGE TO THE AIRCRAFT AND/OR EQUIPMENT.

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

ZONE: 540
ZONE: 640

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 3M (10 FT)- ADJUSTABLE
No specific	AR	PENCIL - WAX
No specific	AR	SAFETY BARRIER(S)
No specific	AR	WARNING NOTICE(S)
No specific	Torque wrench: range to between 110 and 90 lbf.in (1.24 and 1.02 m.daN )
No specific	Torque wrench: range to between 0.10 and 0.08 m.daN (8.85 and 7.08 lbf.in )
No specific	Torque wrench: range to between 0.16 and 0.14 m.daN (14.16 and 12.39 lbf.in )
No specific	Torque wrench: range to between 1.06 and 0.82 m.daN (93.81 and 72.57 lbf.in )

B. Consumable Materials

REFERENCE	DESIGNATION
(Material No.06AAB1)	Polysulfide Sealant-General Purpose Fillet -
(Material No.06AEA1)	Polysulfide Sealant-Low Adhesion Brushable -
(Material No.06LCG9)	Non Hardening Jointing Putty-Medium Temp. Area - -
(Material No.08BAA9)	Non Aqueous Cleaner-General - -
(Material No.14DAB1)	Release Agent-- Water Base -
(Material No.14SBA1)	Textile-Lint free Cotton -

C. Work Zones and Access Panels

ZONE/ACCESS	ZONE DESCRIPTION
540	FUEL TANK
640	FUEL TANK

D. Referenced Information

REFERENCE	DESIGNATION
TASK 32-00-00-481-001-A	Installation of the Safety Devices on the Landing Gears
TASK 32-12-00-010-001-A	Open the Main Gear Doors for Access
TASK 32-12-00-410-001-A	Close the Main Gear Doors after Access
Fuel Pump Fairing - Location and Detail ** ON A/C NOT FOR ALL
Harness Bracket - Adjustment Details ** ON A/C NOT FOR ALL
Fuel Pump Fairing - Location and Detail ** ON A/C NOT FOR ALL
Harness Bracket - Adjustment Details ** ON A/C NOT FOR ALL

3. Job Set-up
Subtask 28-21-49-941-051-A

A. Safety Precautions
(1) Make sure the SAFETY BARRIER(S) are in position.
(2) Make sure that the ground safety locks are installed on the Main Landing Gear (MLG) (Ref. AMM TASK 32-00-00-481-001).
(3) In the cockpit, on center instrument-panel 400VU:

Make sure that the [6GA] is in the DOWN position
Make sure that the WARNING NOTICE(S) is in position to tell persons not to operate the MLG.

Subtask 28-21-49-010-051-A

B. Get Access
(1) Make sure the applicable MLG door is open (Ref. AMM TASK 32-12-00-010-001).
(2) Make sure that the ACCESS PLATFORM 3M (10 FT)- ADJUSTABLE is below the applicable fuel pump fairing at zone 540 (640).

4. Procedure
Subtask 28-21-49-420-052-A ** ON A/C NOT FOR ALL

A. Preparation for the Installation

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

(1) There can be a sealant between the fairings and the lower wing skin. If applicable, use a clean Textile-Lint free Cotton - (Material No.14SBA1) made moist with Non Aqueous Cleaner-General - - (Material No.08BAA9) to clean all the used sealant from:

The cover plate (11) or (24)
The front fairing (12) or (26)
The intermediate fairing (5) or (18)
The rear fairing (4) or (17)
The lower wing skin in the related area.

Subtask 28-21-49-420-052-B ** ON A/C NOT FOR ALL

A. Preparation for the Installation

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

The cover plate (12) or (26)
The front fairing (13) or (28)
The intermediate fairing (5) or (19)
The rear fairing (4) or (18)
The lower wing skin in the related area.

Subtask 28-21-49-420-050-B ** ON A/C NOT FOR ALL

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

B. Installation of the Inboard Fuel-Pump Fairing
Install the inboard fuel pump fairing in this sequence:

The intermediate fairing (5)
The rear fairing (4)
The front fairing (13) and the cover plate (12) assembly.

NOTE: Sealant is not used between the fairings (4), (5) and (13) and the lower wing skin.

(1) Before you install the fairings, make sure that the length of the harness (27) is correct:
(a) Measure the distance between the front face of the connector (36) and the forward edge of the guide (30).
(b) The correct length of the inboard harness must be 1320 mm (51.97 in.).
(2) If necessary, adjust the length of the harness (27) as follows:
(a) Loosen the nuts (32), the bolts (33) and the clamp (34) on the bracket (31) and the guide (30).
(b) Carefully move the harness (27) through the guide (30), the clamp (34) and the conduit (35) to get the correct length.
(3) Install the intermediate fairing (5) as follows:
(a) Hold the intermediate fairing (5) in position near the lower wing skin.
(b) Carefully push the harness (27) into the retention channel in the intermediate fairing (5).
(c) Make sure that the harness (27) is held correctly below the lips of the retention channel in the intermediate fairing (5):
1 Make sure that the harness (27) is not in tension.
(d) Engage the key-hole slots in the intermediate fairing (5) with the wing skin bolts (6).
(e) Move the intermediate fairing (5) forward to fully engage the wing skin bolts (6).
(f) Make sure that the harness (27) is not caught between:

The key-hole slot positions on the intermediate fairing (5) and the wing skin
The edge of the intermediate fairing (5) and the wing skin.

(4) Install the rear fairing (4) as follows:
(a) Make sure that the intermediate fairing (5) is correctly installed and pushed tightly against its stop.
(b) Hold the rear fairing (4) in position near the lower wing skin.
(c) Carefully push the harness (27) into the retention channel in the rear fairing (4).
(d) Make sure that the harness (27) is held correctly below the lips of the retention channel in the rear fairing (4):
1 Make sure that the harness (27) is not in tension.
(e) Pull the harness (27) lightly in a rearward direction.
(f) If necessary, push unwanted harness up through the guide (30) and the clamp (34) into the conduit (35).
(g) Engage the key-hole slots in the rear fairing (4) with the wing skin bolt (6).
(h) Move the rear fairing (4) forward to fully engage the wing skin bolt (6).
(i) Make sure that the:

Forward end of the rear fairing (4) goes into the intermediate fairing (5) (out of wind).
Harness (27) is not caught between the key-hole slot positions on the rear fairing (4) and the wing skin.
Harness (27) is not caught between the edge of the rear fairing (4) and the wing skin.

(j) Make sure that there is a clearance of 3.0 mm (0.12 in.) to 4.0 mm (0.16 in.) between the rear fairing (4) and the intermediate fairing (5):
1 If necessary, cut and de-burr the overlap at the rear of the intermediate fairing (5) to get the correct dimension.
(k) Install the bush (2), the bolt (3) and the nut (1).
(l) TORQUE the nut (1) to between 1.06 and 0.82 m.daN (93.81 and 72.57 lbf.in )

.
(m) Fill the clearance between the rear fairing (4) and the intermediate fairing (5) with Polysulfide Sealant-General Purpose Fillet - (Material No.06AAB1) .
(5) Install the front fairing (13) and the cover plate (12) assembly as follows:
(a) Make sure that the intermediate fairing (5) and rear fairing (4) are correctly installed.
(b) If the front fairing (13) and the cover plate (12) have been disassembled, continue as follows:
1 Install the front fairing (13) to the cover plate (12) with the washer (10), the bolt (11) and the bush (14). Do not tighten the bolt (11).
2 Install the front fairing (13) and the cover plate (12) assembly with the washers (9) and the bolts (8). Do not tighten the bolts (8).
3 Make sure that the front fairing (13) aligns with the intermediate fairing (5).
4 Use a PENCIL - WAX to make match marks on the cover plate (12) around the edge of the front fairing (13).
5 Remove the bolts (8), the washers (9) and the cover plate (12) with the front fairing (13).
6 Remove the bolt (11), the washer (10) and the bush (14).
7 Remove the front fairing (13) from the cover plate (12).
8 Apply Release Agent-- Water Base - (Material No.14DAB1) on the mating surface of the front fairing (13):
a Do not apply the special material on the surface of the front fairing that will touch the wing skin.
9 Apply a small quantity of Polysulfide Sealant-Low Adhesion Brushable - (Material No.06AEA1) on the mating surfaces of the front fairing (13) and the cover plate (12):
a Do not apply the sealant on the surface of the front fairing that will touch the wing skin.
10 Install the front fairing (13) onto the cover plate (12) with the washer (10), the bolt (11) and the bush (14).
11 Make sure that the front fairing (13) aligns with the match marks you made on the cover plate (12).

NOTE: You can refer to the match marks made on the cover plate (12) to install the front fairing (13).

12 TORQUE the bolt (11) to between 0.10 and 0.08 m.daN (8.85 and 7.08 lbf.in )

.
13 Do the step that follows before the sealant has cured:
a Use the sealant pushed out from between the front fairing (13) and the cover plate (12) to make a fillet seal:

Clean the unwanted sealant from the front fairing and the cover plate (12) assembly to make a smooth surface.
Make sure that the sealant does not cause a blockage in the drain hole (7).

(c) Hold the front fairing (13) and the cover plate (12) assembly in position on the wing skin:
1 Make sure that the harness (27) does not rub against the edges of the cover plate (12).
(d) Make sure that there is a clearance of 0.5 mm (0.02 in.) and 3.0 mm (0.12 in.) between the intermediate fairing (5) and the front fairing (13):
1 If necessary, cut and de-burr the overlap at the rear of the front fairing (13) to get the correct dimension.
(e) Apply Non Hardening Jointing Putty-Medium Temp. Area - - (Material No.06LCG9) to the washers (9) and the threads of the bolts (8).
(f) Install the cover plate (12) assembly with the washers (9) and the bolts (8).
(g) TORQUE the bolts (8) to between 110 and 90 lbf.in (1.24 and 1.02 m.daN )

.
(6) Make sure that the guide (30), the bracket (31) and the clamp (34) are in correct position.
(7) TORQUE the nuts (32) to between 0.16 and 0.14 m.daN (14.16 and 12.39 lbf.in )

Subtask 28-21-49-420-051-B ** ON A/C NOT FOR ALL

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

C. Installation of the Outboard Fuel-Pump Fairing
Install the outboard fuel-pump fairing in this sequence:

The intermediate fairing (19)
The rear fairing (18)
The front fairing (28) and the cover plate (26) assembly.

NOTE: Sealant is not used between the fairings (18), (19) and (28) and the lower wing skin.

(1) Before you install the fairings, make sure that the length of the harness (27) is correct:
(a) Measure the distance between the front face of the connector (36) and the forward edge of the guide (30).
(b) The correct length of the outboard harness must be 1345 mm (52.95 in.).
(2) If necessary, adjust the length of the harness (27) as follows:
(a) Loosen the nuts (32), the bolts (33) and the clamp (34) on the bracket (31) and the guide (30).
(b) Carefully move the harness (27) through the guide (30), the clamp (34) and the conduit (35) to get the correct length.
(3) Install the intermediate fairing (19) as follows:
(a) Hold the intermediate fairing (19) in position near the lower wing skin.
(b) Carefully push the harness (27) into the retention channel in the intermediate fairing (19).
(c) Make sure that the harness (27) is held correctly below the lips of the retention channel in the intermediate fairing (19).
1 Make sure that the harness (27) is not in tension.
(d) Engage the key-hole slots in the intermediate fairing (19) with the wing skin bolts (20).
(e) Move the intermediate fairing (19) forward to fully engage the wing skin bolts (20).
(f) Make sure that the harness (27) is not caught between:

The key-hole slot positions on the intermediate fairing (19) and the wing skin
The edge of the intermediate fairing (19) and the wing skin.

(4) Install the rear fairing (18) as follows:
(a) Make sure that the intermediate fairing (19) is correctly installed and pushed tightly against its stop.
(b) Hold the rear fairing (18) in position near the lower wing skin.
(c) Carefully push the harness (27) into the retention channel in the rear fairing (18).
(d) Make sure that the harness (27) is held correctly below the lips of the retention channel in the rear fairing (18):
1 Make sure that the harness (27) is not in tension.
(e) Pull the harness (27) lightly in a rearward direction.
(f) If necessary, push unwanted harness up through the guide (30) and the clamp (34) into the conduit (35).
(g) Engage the key-hole slots in the rear fairing (18) with the wing skin bolt (20).
(h) Move the rear fairing (18) forward to fully engage the wing skin bolt (20).
(i) Make sure that the:

Forward end of the rear fairing (18) goes into the intermediate fairing (19) (out of wind).
Harness (27) is not caught between the key-hole slot positions on the rear fairing (18) and the wing skin.
Harness (27) is not caught between the edge of the rear fairing (18) and the wing skin.

(j) Make sure that there is a clearance of 3.0 mm (0.12 in.) to 4.0 mm (0.16 in.) between the rear fairing (18) and the intermediate fairing (19):
1 If necessary, cut and de-burr the overlap at the rear of the intermediate fairing (19) to get the correct dimension.
(k) Install the bush (16), the bolt (17) and the nut (15).
(l) TORQUE the nut (15) to between 1.06 and 0.82 m.daN (93.81 and 72.57 lbf.in )

.
(m) Fill the clearance between the rear fairing (18) and the intermediate fairing (19) with Polysulfide Sealant-General Purpose Fillet - (Material No.06AAB1) .
(5) Install the front fairing (28) and the cover plate (26) assembly as follows:
(a) Make sure that the intermediate fairing (19) and the rear fairing (18) are correctly installed.
(b) If the front fairing (28) and the cover plate (26) have been disassembled, continue as follows:
1 Install the front fairing (28) to the cover plate (26) with the washer (24), the bolt (25) and the bush (29). Do not tighten the bolt (25).
2 Install the cover plate (26) (complete with the front fairing (28)) to the lower wing skin with the washers (23) and the bolts (22). Do not tighten the bolts (22).
3 Make sure that the front fairing (28) aligns with the intermediate fairing (19).
4 Use a PENCIL - WAX to make match mark on the cover plate (26) around the edge of the front fairing (28).
5 Remove the bolts (22), the washers (23) and the cover plate (26) with the front fairing (28).
6 Remove the bolt (25), the washer (24) and the bush (29).
7 Remove the front fairing (28) from the cover plate (26).
8 Apply Release Agent-- Water Base - (Material No.14DAB1) on the mating surface of the front fairing (28):
a Do not apply the special material on the surface of the front fairing (28) that will touch the wing skin.
9 Apply a small quantity of Polysulfide Sealant-Low Adhesion Brushable - (Material No.06AEA1) on the mating surfaces of the front fairing (28) and the cover plate (26):
a Do not apply the sealant on the surface of the front fairing (28) that will touch the wing skin.
10 Install the front fairing (28) onto the cover plate (26) with the washer (24), the bolt (25) and the bush (29).
11 Make sure that the front fairing (28) aligns with the match marks you made on the cover plate (26).

NOTE: You can refer to the match marks made on the cover plate (26) to install the front fairing (28).

12 TORQUE the bolt (25) to between 0.10 and 0.08 m.daN (8.85 and 7.08 lbf.in )

.
13 Do the step that follows before the sealant has cured:
a Use the sealant pushed out from between the front fairing (28) and the cover plate (26) to make a fillet seal:

Clean the unwanted sealant from the front fairing (28) and the cover plate (26) assembly to make a smooth surface.
Make sure that the sealant does not cause a blockage in the drain hole (21).

(c) Hold the front fairing (28) and the cover plate (26) assembly in position on the lower wing skin:
1 Make sure that the harness (27) does not rub against the edges of the cover plate (26).
(d) Make sure that there is a clearance of 0.5 mm (0.02 in.) and 3.0 mm (0.12 in.) between the intermediate fairing (19) and the front fairing (28):
1 If necessary, cut and de-burr the overlap at the rear of the front fairing (28) to get the correct dimension.
(e) Apply Non Hardening Jointing Putty-Medium Temp. Area - - (Material No.06LCG9) to the washers (23) and the threads of the bolts (22).
(f) Install the cover plate (26) assembly with the washers (23) and the bolts (22).
(g) TORQUE the bolts (22) to between 110 and 90 lbf.in (1.24 and 1.02 m.daN )

.
(6) Make sure that the guide (30), the bracket (31) and the clamp (34) are in correct position.
(7) TORQUE the nuts (32) to between 0.16 and 0.14 m.daN (14.16 and 12.39 lbf.in )

Subtask 28-21-49-420-050-C ** ON A/C NOT FOR ALL

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

D. Installation of the Inboard Fuel-Pump Fairing
Install the inboard fuel pump fairing in this sequence:

The intermediate fairing (5)
The rear fairing (4)
The front fairing (12) and the cover plate (11) assembly.

NOTE: Sealant is not used between the fairings (4), (5) and (12) and the lower wing skin.

(1) Before you install the fairings, make sure that the length of the harness (25) is correct:
(a) Measure the distance between the front face of the connector (36) and the forward edge of the guide (30).
(b) The correct length of the inboard harness must be 1320 mm (51.97 in.).
(2) If necessary, adjust the length of the harness (25) as follows:
(a) Loosen the nuts (31), the bolts (32) and the clamp (33) on the bracket (34) and the guide (30).
(b) Carefully move the harness (25) through the guide (30), the clamp (33) and the conduit (35) to get the correct length.
(3) Install the intermediate fairing (5) as follows:
(a) Hold the intermediate fairing (5) in position near the lower wing skin.
(b) Carefully push the harness (25) into the retention channel in the intermediate fairing (5).
(c) Make sure that the harness (25) is held correctly below the lips of the retention channel in the intermediate fairing (5):
1 Make sure that the harness (25) is not in tension.
(d) Engage the key-hole slots in the intermediate fairing (5) with the wing skin bolts (6).
(e) Move the intermediate fairing (5) forward to fully engage the wing skin bolts (6).
(f) Make sure that the harness (25) is not caught between:

The key-hole slot positions on the intermediate fairing (5) and the wing skin
The edge of the intermediate fairing (5) and the wing skin.

(4) Install the rear fairing (4) as follows:
(a) Make sure that the intermediate fairing (5) is correctly installed and pushed tightly against its stop.
(b) Hold the rear fairing (4) in position near the wing skin.
(c) Carefully push the harness (25) into the retention channel in the rear fairing (4).
(d) Make sure that the harness (25) is held correctly below the lips of the retention channel in the rear fairing (4):
1 Make sure that the harness (25) is not in tension.
(e) Pull the harness (25) lightly in a rearward direction.
(f) If necessary, push unwanted harness (25) up through the guide (30) and the clamp (33) into the conduit (35).
(g) Engage the key-hole slots in the rear fairing (4) with the wing skin bolt (6).
(h) Move the rear fairing (4) forward to fully engage the wing skin bolt (6).
(i) Make sure that the:

Forward end of the rear fairing (4) goes into the intermediate fairing (5) (out of wind).
Harness (25) is not caught between the key-hole slot positions on the rear fairing (4) and the wing skin.
Harness (25) is not caught between the edge of the rear fairing (4) and the wing skin.

.
(m) Fill the clearance between the rear fairing (4) and the intermediate fairing (5) with Polysulfide Sealant-General Purpose Fillet - (Material No.06AAB1) .
(5) Install the front fairing (12) and the cover plate (11) assembly as follows:
(a) Make sure that the intermediate fairing (5) and rear fairing (4) are correctly installed.
(b) If the front fairing (12) and the cover plate (11) have been disassembled, continue as follows:
1 Install the front fairing (12) to the cover plate (11) with the washer (9), the bolt (10) and the bush (13). Do not tighten the bolt (10).
2 Install the cover plate (11) with the front fairing (12) to the lower wing with the bolts (8). Do not tighten the bolts (8).
3 Make sure that the front fairing (12) aligns correctly with the intermediate fairing (5).
4 Use a PENCIL - WAX to make match marks on the cover plate (11) around the edge of the front fairing (12).
5 Remove the bolts (8) and the cover plate (11) with the front fairing (12).
6 Remove the bolt (10), the washer (9) and the bush (13).
7 Remove the front fairing (12) from the cover plate (11).
8 Apply Release Agent-- Water Base - (Material No.14DAB1) on the mating surface of the front fairing (12):
a Do not apply the special material on the surface of the front fairing that will touch the wing skin.
9 Apply a small quantity of Polysulfide Sealant-Low Adhesion Brushable - (Material No.06AEA1) on the mating surfaces of the front fairing (12) and the cover plate (11):
a Do not apply the sealant on the surface of the front fairing that will touch the wing skin.
10 Install the front fairing (12) onto the cover plate (11) with the washer (9), the bolt (10) and the bush (13).
11 Make sure that the front fairing (12) aligns with the match marks you made on the cover plate (11).

NOTE: You can refer to the match marks made on the cover plate (11) to install the front fairing (12).

12 TORQUE the bolt (10) to between 0.10 and 0.08 m.daN (8.85 and 7.08 lbf.in )

.
13 Do the step that follows before the sealant has cured:
a Use the sealant pushed out from between the front fairing (12) and the cover plate (11) to make a fillet seal:

Clean the unwanted sealant from the front fairing (12) and the cover plate (11) assembly to make a smooth surface.
Make sure that the sealant does not cause a blockage in the drain hole (7).

(c) Hold the front fairing (12) and cover plate (11) assembly in position on the wing skin:
1 Make sure that the harness (25) does not rub against the edges of the cover plate (11).
(d) Make sure that there is a clearance of 0.5 mm (0.02 in.) and 3.0 mm (0.12 in.) between the intermediate fairing (5) and the front fairing (12).
(e) If necessary, cut and de-burr the overlap at the rear of the front fairing (12) to get the correct dimension.
(f) Install the cover plate (11) assembly with the bolts (8).
(g) TORQUE the bolts (8) to between 110 and 90 lbf.in (1.24 and 1.02 m.daN )

.
(6) Make sure that the guide (30), the bracket (34) and the clamp (33) are in correct position.
(7) TORQUE the nuts (31) to between 0.16 and 0.14 m.daN (14.16 and 12.39 lbf.in )

Subtask 28-21-49-420-051-C ** ON A/C NOT FOR ALL

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

E. Installation of the Outboard Fuel-Pump Fairing
Install the outboard fuel-pump fairing in this sequence:

The intermediate fairing (18)
The rear fairing (17)
The front fairing (26) and the cover plate (24) assembly.

NOTE: Sealant is not used between the fairings (17), (18) and (26) and the lower wing skin.

(1) Before you install the fairings, make sure that the length of the harness (25) is correct:
(a) Measure the distance between the front face of the connector (36) and the forward edge of the guide (30).
(b) The correct length of the outboard harness must be 1345 mm (52.95 in.).
(2) If necessary, adjust the length of the harness (25) as follows:
(a) Loosen the nuts (31), the bolts (32) and the clamp (33) on the bracket (34) and the guide (30).
(b) Carefully move the harness (25) through the guide (30), the clamp (33) and the conduit (35) to get the correct length.
(3) Install the intermediate fairing (18) as follows:
(a) Hold the intermediate fairing (18) in position near the lower wing skin.
(b) Carefully push the harness (25) into the retention channel in the intermediate fairing (18).
(c) Make sure that the harness (25) is held correctly below the lips of the retention channel in the intermediate fairing (18):
1 Make sure that the harness (25) is not in tension.
(d) Engage the key-hole slots in the intermediate fairing (18) with the wing skin bolts (19).
(e) Move the intermediate fairing (18) forward to fully engage the wing skin bolts (19).
(f) Make sure that the harness (25) is not caught between:

The key-hole slot positions on the intermediate fairing (18) and the wing skin
The edge of the intermediate fairing (18) and the wing skin.

(4) Install the rear fairing (17) as follows:
(a) Make sure that the intermediate fairing (18) is correctly installed and pushed tightly against its stop.
(b) Hold the rear fairing (17) in position near the lower wing skin.
(c) Carefully push the harness (25) into the retention channel in the rear fairing (17).
(d) Make sure that the harness (25) is held correctly below the lips of the retention channel in the rear fairing (17):
1 Make sure that the harness (25) is not in tension.
(e) Pull the harness (25) lightly in a rearward direction.
(f) If necessary, push unwanted harness up through the guide (30) and the clamp (33) into the conduit (35).
(g) Engage the key-hole slots in the rear fairing (17) with the wing skin bolt (19).
(h) Move the rear fairing (17) forward to fully engage the wing skin bolt (19).
(i) Make sure that the:

Forward end of the rear fairing (17) goes into the intermediate fairing (18) (out of wind).
Harness (25) is not caught between the key-hole slot positions on the rear fairing (17) and the wing skin.
Harness (25) is not caught between the edge of the rear fairing (17) and the wing skin.

(j) Make sure that there is a clearance of 3.0 mm (0.12 in.) to 4.0 mm (0.16 in.) between the rear fairing (17) and the intermediate fairing (18).
(k) If necessary, cut and de-burr the overlap at the rear of the intermediate fairing (18) to get the correct dimension.
(l) Install the bush (15), the bolt (16) and the nut (14).
(m) TORQUE the nut (14) to between 1.06 and 0.82 m.daN (93.81 and 72.57 lbf.in )

.
(n) Fill the clearance between the rear fairing (17) and intermediate fairing (18) with Polysulfide Sealant-General Purpose Fillet - (Material No.06AAB1) .
(5) Install the front fairing (26) and the cover plate (24) assembly as follows:
(a) Make sure that the intermediate fairing (18) and the rear fairing (17) are correctly installed.
(b) If the front fairing (26) and the cover plate (24) have been disassembled, continue as follows:
1 Loosely assemble the front fairing (26) to the cover plate (24) with the washer (22), the bolt (23) and the bush (27).
2 Loosely assemble the cover plate (24) with the front fairing (26) to the wing skin with the bolts (21).
3 Make sure that the front fairing (26) aligns with the intermediate fairing (18).
4 Use a PENCIL - WAX to make marks on the cover plate (24) around the edge of the front fairing (26).
5 Remove the bolts (21) and the cover plate (24) with the front fairing (26).
6 Remove the bolt (23), the washer (22) and the bush (27).
7 Remove the front fairing (26) from the cover plate (24).
8 Apply Release Agent-- Water Base - (Material No.14DAB1) on the mating surface of the front fairing (26):
a Do not apply the special material on the surface of the front fairing that will touch the wing skin.
9 Apply a small quantity of Polysulfide Sealant-Low Adhesion Brushable - (Material No.06AEA1) on the mating surfaces of the front fairing (26) and the cover plate (24):
a Do not apply the sealant on the surface of the front fairing that will touch the wing skin.
10 Install the front fairing (26) onto the cover plate (24) with the washer (22), the bolt (23) and the bush (27).
11 Make sure that the front fairing (26) aligns with the match marks you made on the cover plate (24).

NOTE: You can refer to the match marks made on the cover plate (24) to install the front fairing (26).

12 TORQUE the bolt (23) to between 0.10 and 0.08 m.daN (8.85 and 7.08 lbf.in )

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13 Do the step that follows before the sealant has cured:
a Use the sealant pushed out from between the front fairing (26) and the cover plate (24) to make a fillet seal:

Clean the unwanted sealant from the front fairing and the cover plate assembly to make a smooth surface.
Make sure that the sealant does not cause a blockage in the drain hole (20).

(c) Hold the front fairing (26) and the cover plate (24) assembly in position on the wing skin:
1 Make sure that the harness (25) does not rub against the edges of the cover plate (24).
(d) Make sure that there is a clearance of 0.5 mm (0.02 in.) to 3.0 mm (0.12 in.) between the intermediate fairing (18) and the front fairing (26).
(e) If necessary, cut and de-burr the overlap at the rear of the front fairing (26) to get the correct dimension.
(f) Install the cover plate (24) assembly with the bolts (21).
(g) TORQUE the bolts (21) to between 110 and 90 lbf.in (1.24 and 1.02 m.daN )

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(6) Make sure that the guide (30), the bracket (34) and the clamp (33) are in correct position.
(7) TORQUE the nuts (31) to between 0.16 and 0.14 m.daN (14.16 and 12.39 lbf.in )

5. Close-up
Subtask 28-21-49-410-050-A

A. Removal of Equipment
(1) Make sure that the work area is clean and clear of tools and other items.
(2) Close the applicable MLG door (Ref. AMM TASK 32-12-00-410-001).
(3) Remove the access platform(s).
(4) Remove the safety barriers.
(5) Remove the WARNING NOTICE(S).

[Rev.10 from 2021] 2026.04.02 06:53:42 UTC