Installation of the Vapor Seal

TASK 28-13-42-400-001-A
Installation of the Vapor Seal

NOTE: You must take care when you work with the vapor seal. Prevent distortion of the metal attach frames and fittings. Make sure that there are no tears, scratches or folded areas on the vapor seal-membrane.

ZONE: 190

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 0.31 and 0.29 m.daN (27.43 and 25.66 lbf.in )

B. Consumable Materials

REFERENCE	DESIGNATION
(Material No.03FAB1)	Mineral Oil base Grease-- Vaseline or Petrolatum -
(Material No.03QDB1)	Dry lubricant-Anti Seizing PTFE Loaded -
(Material No.06ABA1)	Polysulfide Sealant-Fuel Tank Brushable -

C. Work Zones and Access Panels

ZONE/ACCESS	ZONE DESCRIPTION
190	BELLY FAIR, AIR CONDITIONING & HYD COMPT

D. Referenced Information

REFERENCE	DESIGNATION
TASK 21-51-41-000-001-A	Removal of the Ozone Filter
TASK 21-51-41-400-001-A	Installation of the Ozone Filter
TASK 21-51-51-000-001-A	Removal of the Pack Flow-Control Valve/ Pack Flow-Control Unit
TASK 21-51-51-400-001-A	Installation of the Pack Flow-Control Valve/Pack Flow-Control Unit
TASK 21-52-23-000-002-A	Removal of the Pipe Assembly between the Anti-Ice Valve (if installed), the Bypass Valve and the Air Cycle Machine
TASK 21-52-23-000-003-A	Removal of the Pipe Assembly between the Anti-Ice Valve (if installed) and the Bypass Air Duct of the Primary Heat Exchanger
TASK 21-52-23-400-002-A	Installation of the Pipe Assembly between the Anti-Ice Valve (if installed), the Bypass Valve and the Air Cycle Machine
TASK 21-52-23-400-003-A	Installation of the Pipe Assembly between the Anti-Ice Valve (if installed) and the Bypass Air Duct Duct of the Primary Heat Exchanger
TASK 21-52-41-000-001-A	Removal of the Air Conditioning Pack
TASK 21-52-41-400-001-A	Installation of the Air Conditioning Pack
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 28-13-42-000-001-A	Removal of the Vapor Seal
TASK 28-13-42-300-001-A	Center-Tank Vapor-Seal-Membrane Repair
TASK 28-13-42-400-001-A	Installation of the Vapor Seal
TASK 28-18-00-700-001-A	Functional Check of Tank Vapor Seal and Vent Drain System (Aircraft Fitted with a Center Tank)
TASK 28-43-23-000-004-A	Removal of the Magnetic Level-Indicator Upper-Housing
TASK 28-43-23-400-003-A	Installation of the Magnetic Level-Indicator Upper-Housing
TASK 36-12-41-000-001-A	Removal of a Bleed-Air Duct
TASK 36-12-41-400-001-A	Installation of a Bleed-Air Duct
Trim-Air Duct
Bleed-Air Duct
Vapor Seal - Membrane LH
Vapor Seal - Membrane CTR
Vapor Seal - Membrane RH

3. Job Set-up
Subtask 28-13-42-860-051-B

A. Aircraft Maintenance Configuration
(1) Make sure that the aircraft electrical circuits are de-energized (Ref. AMM TASK 24-41-00-862-002).

Subtask 28-13-42-010-056-B ** ON A/C NOT FOR ALL

B. Get Access
(1) Make sure that the air conditioning pack(s) are removed (Ref. AMM TASK 21-52-41-000-001).
(2) Make sure that the pack flow-control valve(s)/pack flow-control unit(s) are removed (Ref. AMM TASK 21-51-51-000-001).
(3) Make sure that ozone filter(s) (converter) 100HM (101HM) are removed (Ref. AMM TASK 21-51-41-000-001).
(4) Make sure that the applicable pipe assemblies are removed (Ref. AMM TASK 21-52-23-000-002) and (Ref. AMM TASK 21-52-23-000-003).
(5) Make sure that the bleed air duct(s) (100), (101), (102) are removed (Ref. AMM TASK 36-12-41-000-001)

Trim-Air Duct ** ON A/C NOT FOR ALL

Bleed-Air Duct ** ON A/C NOT FOR ALL

CAUTION: MAKE MATCH MARKS ON ALL THE ELECTRICAL WIRES BEFORE YOU DISCONNECT THEM. INCORRECT CONNECTION OF WIRES WILL CAUSE DAMAGE TO EQUIPMENT.

(6) Make sure that the applicable electrical harnesses are disconnected from the receptacles, to get access to the vapor seal.

Subtask 28-13-42-010-056-D ** ON A/C NOT FOR ALL

B. Get Access
(1) Make sure that air conditioning pack(s) are removed (Ref. AMM TASK 21-52-41-000-001).
(2) Make sure that the pack flow-control valve(s)/pack flow-control unit(s) are removed (Ref. AMM TASK 21-51-51-000-001).
(3) Make sure that ozone filter(s) (converter) 100HM (101HM) are removed (Ref. AMM TASK 21-51-41-000-001).
(4) Make sure that the pipe assembly is removed (Ref. AMM TASK 21-52-23-000-002).
(5) Make sure that the bleed air duct(s) (100), (101), (102) are removed (Ref. AMM TASK 36-12-41-000-001)

Trim-Air Duct ** ON A/C NOT FOR ALL

Bleed-Air Duct ** ON A/C NOT FOR ALL

CAUTION: MAKE MATCH MARKS ON ALL THE ELECTRICAL WIRES BEFORE YOU DISCONNECT THEM. INCORRECT CONNECTION OF WIRES WILL CAUSE DAMAGE TO EQUIPMENT.

(6) Make sure that the applicable electrical harnesses are disconnected from the receptacles to get access to the vapor seal.
(7) Make sure that the magnetic level-indicator upper-housing is removed (Ref. AMM TASK 28-43-23-000-004).

4. Procedure
Subtask 28-13-42-420-050-B

A. Installation of the Vapor Seal
(1) Make sure that the parts retained from the removed component are clean and in the correct condition.

the vapor-seal membranes,
the retainers,
the seals have no cracks.

(2) Clean the component interfaces and the adjacent area.
(3) Do an inspection of the component interfaces and the adjacent area.
(a) Inspect the lower seals bonded to the structure, and make sure that these seals have no cracks.
(b) If you find cracks on the seals, replace the seals (Ref. AMM TASK 28-13-42-300-001).

NOTE: If possible, do replace the seals with the rough side of the seal on the structure. The installation of the seals with the smooth side on the structure is permitted, if the surface of the seal is smooth on both sides.

(4) Apply Dry lubricant-Anti Seizing PTFE Loaded - (Material No.03QDB1) to the edge of the RH vapor seal-membrane (46) where it joins the CTR vapor seal-membrane (35).

NOTE: Put the vapor seal in position and attach it temporarily to make the installation easier. Do not tighten all the screws, the studs and the nuts until all fittings are installed.

(5) Install the RH Vapor Seal-Membrane:
(a) Make sure that the lower fittings and seals (77) are in the correct position.
(b) Put the RH vapor seal-membrane (46) in position on the lower surface of the center-tank.
(c) Install the seals (77), the sealing strips (75) and the lateral fittings (67), (68), (69), (70), (71) and (72) with the screws (6) and the washers (7) to the RH vapor seal-membrane (46).

NOTE: Make sure that the clearance between the bonded sealing parts are filled with sealing compound.

(d) If necessary apply Polysulfide Sealant-Fuel Tank Brushable - (Material No.06ABA1) to the clearance between the sealing parts.
(e) Use Dry lubricant-Anti Seizing PTFE Loaded - (Material No.03QDB1) where the vapor seal touches the sealing compound.
(f) Install the seals (77), the sealing strips (75) and the longitudinal fittings (56), (57), (58), (59), (60), (61), (62), (63), (64), (65) and (66) with the studs (4), the washers (3) and the spring washers (8) to the RH vapor seal-membrane (46).
(g) Install the seals (77), the sealing strips (75) and the attach frames (48), (49), (50), (51), (52), (53), (54) and (55) with the studs (4), the washers (3) and the spring washers (8) to the RH vapor seal-membrane (46).
(6) Install the CTR Vapor Seal-Membrane:
(a) Apply Dry lubricant-Anti Seizing PTFE Loaded - (Material No.03QDB1) to the edge of the CTR vapor seal-membrane (35) where it joins the LH vapor seal-membrane (1).
(b) Install the sealing strips (75) and the lateral fittings (41), (42), (43), (44) and (45) with the screws (6) and the washers (7) to the CTR vapor seal-membrane (35).
(c) Install the sealing strips (75), the attach frame (36) and the longitudinal fittings (37), (38), (39) and (40) with the studs (4), the washers (3) and the spring washers (8).
(7) Install the LH Vapor Seal-Membrane:
(a) Make sure that the lower fittings and seals (76) are in the correct position.
(b) Put the LH vapor seal-membrane (1) in position on the lower surface of the center-tank.
(c) Install the seals (76), the sealing strips (75) and the lateral fittings (25), (26), (27), (28), (29) and (30) with the screws (6) and the washers (7) to the LH vapor seal-membrane (1).

NOTE: Make sure that the clearance between the bonded sealing parts are filled with sealing compound.

NOTE: Make sure that the vapor seal-membranes have no scratches or folds before you start to tighten the vapor seal.

(8) TORQUE the screws (6) and the studs (4) to between 0.31 and 0.29 m.daN (27.43 and 25.66 lbf.in )

.
(9) Installation of the heat shields:
(a) Make sure that all studs (4) are installed in the correct position.
(b) Apply a thin layer of Mineral Oil base Grease-- Vaseline or Petrolatum - (Material No.03FAB1) on the washers (3).

NOTE: The applied material keep the washers in position.

(c) Put the heat shields (5), (47) together with the washers (3) in position on the studs (4) of the vapor seal-membranes (1), (46).
(d) Install the nuts (2) on the studs (4).
(e) TORQUE the nuts (2) to between 0.31 and 0.29 m.daN (27.43 and 25.66 lbf.in )

Subtask 28-13-42-790-050-A

B. Leak Test
(1) Do the Functional Check of Tank Vapor Seal and Vent Drain System, to make sure that the Vapor Seal Membrane has no leak (Ref. AMM TASK 28-18-00-700-001).

NOTE: Leaks are not permitted.

(2) If you found a leak, repair all the leaks on the Vapor Seal Membrane (Ref. AMM TASK 28-13-42-300-001).
(3) If you found a leak on the connections of the vapor seal membrane, remove and install again parts of the Vapor Seal Membrane (Ref. AMM TASK 28-13-42-000-001) (Ref. AMM TASK 28-13-42-400-001).
(4) After repair and installation of the Vapor Seal Membrane, do the Functional Check of Tank Vapor Seal again (Ref. AMM TASK 28-18-00-700-001).

5. Close-up
Subtask 28-13-42-410-051-B ** 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.

CAUTION: REFER TO THE MATCH MARKS MADE DURING THE REMOVAL WHEN YOU CONNECT THE ELECTRICAL WIRES. INCORRECT CONNECTION OF THE WIRES WILL CAUSE DAMAGE TO EQUIPMENT.

(2) Remove the CAP-BLANKING from each electrical connector and receptacle.
(3) Make sure that all the electrical connections are clean and in the correct condition.
(4) Connect the applicable electrical harnesses to the receptacles.
(5) Install the applicable bleed air duct(s) (Ref. AMM TASK 36-12-41-400-001).
(6) Install the applicable pipe assemblies (Ref. AMM TASK 21-52-23-400-002) and (Ref. AMM TASK 21-52-23-400-003).
(7) Install the pack flow-control valve(s)/pack flow-control unit(s) (Ref. AMM TASK 21-51-51-400-001).
(8) Install the air conditioning pack(s) (Ref. AMM TASK 21-52-41-400-001).
(9) Install ozone filter(s) (converter) 100HM (101HM) (Ref. AMM TASK 21-51-41-400-001).
(10) Remove the ground support and maintenance equipment, the special and standard tools and all other items.

Subtask 28-13-42-410-051-D ** 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 the magnetic level-indicator upper-housing (Ref. AMM TASK 28-43-23-400-003).

CAUTION: REFER TO THE MATCH MARKS MADE DURING THE REMOVAL WHEN YOU CONNECT THE ELECTRICAL WIRES. INCORRECT CONNECTION OF THE WIRES WILL CAUSE DAMAGE TO EQUIPMENT.

(3) Remove the CAP-BLANKING from each electrical connector and receptacle.
(4) Make sure that all the electrical connections are clean and in the correct condition.
(5) Connect the applicable electrical harnesses to the receptacles.
(6) Install the applicable bleed air duct(s) (Ref. AMM TASK 36-12-41-400-001).
(7) Install the pipe assembly (Ref. AMM TASK 21-52-23-400-002).
(8) Install the pack flow-control valve(s)/pack flow-control unit(s) (Ref. AMM TASK 21-51-51-400-001).
(9) Install the air conditioning pack(s) (Ref. AMM TASK 21-52-41-400-001).
(10) Install ozone filter(s) (converter) 100HM (101HM) (Ref. AMM TASK 21-51-41-400-001).
(11) Remove the ground support and maintenance equipment, the special and standard tools and all other items.

[Rev.10 from 2021] 2026.04.02 07:02:12 UTC