Aft Cargo-Door Linings - Wet Lay-up Repair-Procedure

TASK 52-32-13-340-801-A
Aft Cargo-Door Linings - Wet Lay-up Repair-Procedure

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

ZONE: 826

1. Reason for the Job
Refer to the AMM Task 52-32-13-300-80100.
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	1	BAG - VACUUM
No specific	1	CLOTH - ABRASIVE (GRADE 120-180)
No specific	1	CLOTH-EMERY (GRADE 240)
No specific	1	CUTTER - THIN BLADE
No specific	1	GUN - FASTENER
No specific	1	PAINTBRUSH
98D52307515000	1	SAFETY LOCK-ACTUATOR,CARGO DOORS

B. Consumable Materials

REFERENCE	DESIGNATION
(Material No.04BAM6)	Pore Filler Polyurethane-- - Furnishing
(Material No.04JMD9)	Top Coat Polyurethane-- Decorative Furnishing
(Material No.05RAJ9)	Adhesive Film Tape-- Film PTFE -
(Material No.05WBA1)	Adhesive Primer-Pressure Sensitive Adhesive - -
(Material No.08BBD1)	Non Aqueous Cleaner-- Isopropyl Alcohol -
(Material No.13AEC1)	Dry glass fabric-8H Satin 293 gsm - 181 style SRM Type 2 -
(Material No.13AFB1)	Dry glass fabric-8H Satin 293 gsm - 7781 style SRM Type 1 -
(Material No.13EBK1)	Laminating resin-Epoxy Fire compliant -
(Material No.14SBA1)	Textile-Lint free Cotton -
No specific	ABS1133C
No specific	ABS1133D
No specific	ASNA 0113-32
No specific	NAS 1919 C04

C. Work Zones and Access Panels

ZONE/ACCESS	ZONE DESCRIPTION
826	AFT CARGO COMPARTMENT DOOR

D. Referenced Information

REFERENCE	DESIGNATION
TASK 52-30-00-080-001-A	Removal of the Safety Support Equipment
TASK 52-30-00-480-001-A	Installation of the Safety Support Equipment
TASK 52-30-00-860-001-A	Open the FWD or Aft Cargo-Compartment Door with the Yellow Electric Pump
TASK 52-30-00-860-002-A	Close the FWD or Aft Cargo-Compartment Door with the Yellow Electric Pump
TASK 52-32-13-000-001-A	Removal of the Lining and Insulation
TASK 52-32-13-300-801-A	Aft Cargo-Door Linings - General Repair Data
TASK 52-32-13-400-001-A	Installation of the Lining and Insulation
Aft Cargo-Door Linings - Repair Area
Aft Cargo-Door Linings - Wet Lay-up Repair

3. Job Set-up
Subtask 52-32-13-010-051-A

A. Get Access
(1) Put the ACCESS PLATFORM 4M (13 FT)-ADJUSTABLE in position.
(2) Open the aft cargo-compartment door (Ref. AMM TASK 52-30-00-860-001).
(3) Install the 98D52307515000 SAFETY LOCK-ACTUATOR,CARGO DOORS on the door actuator (Ref. AMM TASK 52-30-00-480-001).
(4) Remove the applicable cargo door lining (Ref. AMM TASK 52-32-13-000-001).

4. Procedure
Subtask 52-32-13-210-051-A

A. Identification of the Damage Limits
(1) Make sure that you selected the correct repair procedure (Ref. AMM TASK 52-32-13-300-801).

Subtask 52-32-13-340-051-A

B. Repair of the Aft Cargo-Door Lining
(1) Remove and discard the applicable insulation mat or part of it from the damaged aft cargo-door lining.

CAUTION: BE CAREFUL WHEN YOU MAKE A CUTOUT IN THE INSULATION MAT WITH THE CUTTER. IF YOU ARE NOT CAREFUL, YOU CAN CAUSE DAMAGE TO THE CARGO DOOR LINING.

(a) If the damaged area of the insulation mat is small, cut it sufficiently with the CUTTER - THIN BLADE.
(b) If you must repair more than one damaged area, remove the full insulation mat from the damaged aft cargo-door lining.
(2) Prepare the damaged area as follows:
(a) On the front of the aft cargo-door lining, remove the paint with the CLOTH-EMERY (GRADE 240).
(b) Make sure that:
1 Diameter P of the area from which you remove the paint is approximately 150 mm (5.91 in.).
2 You only remove the paint but not the material from the glass fabric layer of the aft cargo-door lining.
(c) On the rear of the aft cargo-door lining, remove the ply carefully with the CLOTH-EMERY (GRADE 240):
1 In each direction, make sure that the area from which you remove the ply is a minimum of 15 mm (0.59 in.) larger than the damaged area (dimension B).
(d) For a crack repair, make sure that you remove all the loose glass fibers from the crack.
(e) Clean the repair area with the Non Aqueous Cleaner-- Isopropyl Alcohol - (Material No.08BBD1) and the Textile-Lint free Cotton - (Material No.14SBA1) .
(f) Let the area dry for a minimum of 15 minutes.
(3) Prepare two repair patches for the rear of the aft cargo-door lining:
(a) Cut a small repair patch from the Dry glass fabric-8H Satin 293 gsm - 7781 style SRM Type 1 - (Material No.13AFB1) or the Dry glass fabric-8H Satin 293 gsm - 181 style SRM Type 2 - (Material No.13AEC1) to the applicable dimensions:
1 In each direction, make sure that the small repair patch is 35 mm (1.38 in.) larger than the damaged area (dimension E = B + C + C).

NOTE: Dimension C is 10 mm (0.39 in.).

2 If the damaged area is near a fixation hole (which diameter is less than 60 mm (2.36 in.)), apply the small repair patch on this hole with an overlap of 25 mm (0.98 in.) minimum (dimension G) (panel edge not included).
3 Make sure that the repair patch includes the two damaged areas if the distance between those areas is less than 100 mm (3.94 in.).
4 Make each corner of the small repair patch circular with a radius of approximately 10 mm (0.39 in.).

NOTE: This step is not necessary for the corner of the repair patch at the edge of the aft cargo-door lining.

(b) Cut a large repair patch from the Dry glass fabric-8H Satin 293 gsm - 7781 style SRM Type 1 - (Material No.13AFB1) or the Dry glass fabric-8H Satin 293 gsm - 181 style SRM Type 2 - (Material No.13AEC1) to the applicable dimensions:
1 In each direction, make sure that the large repair patch is 15 mm (0.59 in.) larger than the small repair patch (dimension D).
2 Make each corner of the large repair patch circular with a radius of approximately 10 mm (0.39 in.).

NOTE: This step is not necessary for the corner of the repair patch at the edge of the aft cargo-door lining.

(4) Prepare two repair patches for the front of the aft cargo-door lining:
(a) Cut a small repair patch from the Dry glass fabric-8H Satin 293 gsm - 7781 style SRM Type 1 - (Material No.13AFB1) or the Dry glass fabric-8H Satin 293 gsm - 181 style SRM Type 2 - (Material No.13AEC1) to the applicable dimensions:
1 In each direction, make sure that the small repair patch is 42.5 mm (1.67 in.) larger than the damaged area (dimension E + D/2).
2 Make each corner of the small repair patch circular with a radius of approximately 10 mm (0.39 in.).

NOTE: This step is not necessary for the corner of the repair patch at the edge of the aft cargo-door lining.

(5) Fill the cracks or holes with the Laminating resin-Epoxy Fire compliant - (Material No.13EBK1) .
(6) Make sure that the epoxy resin is flush with the prepared area.

NOTE: The resin will become hard after approximately 25 minutes at 23 deg.C (73.40 deg.F).

(7) Install the two repair patches on the rear of the aft cargo-door lining:
(a) Apply a smooth layer of Laminating resin-Epoxy Fire compliant - (Material No.13EBK1) on the prepared area.
(b) Make sure that the area with the epoxy resin has the same size as the small repair patch.
(c) Put the small repair patch in position.
(d) Make sure that:
1 The fiber of the aft cargo-door lining glass-fabric is in the correct direction.
2 The angle between the glass fabric layer of the aft cargo-door lining and the small repair patch is 45 degrees.
3 In each direction, the small repair patch is 35 mm (1.38 in.) larger than the damaged area (dimension E).
(e) Apply a smooth layer of Laminating resin-Epoxy Fire compliant - (Material No.13EBK1) on the small repair patch and the prepared area.
(f) Make sure that the area with the epoxy resin has the same size as the large repair patch.
(g) Put the large repair patch in position.
(h) Make sure that:
1 The fiber of the aft cargo-door lining glass-fabric is in the correct direction.
2 The angle between the glass fabric layer of the aft cargo-door lining and the large repair patch is 0 or 90 degrees.
3 In each direction, the large repair patch is 15 mm (0.59 in.) larger than the small repair patch (dimension D).
(8) Install the two repair patches on the front of the aft cargo-door lining:
(a) Apply a smooth layer of Laminating resin-Epoxy Fire compliant - (Material No.13EBK1) on the prepared area.
(b) Make sure that the area with the epoxy resin has the same size as the small repair patch.
(c) Put the small repair patch in position.
(d) Make sure that:
1 The fiber of the aft cargo-door lining glass-fabric is in the correct direction.
2 The angle between the glass fabric layer of the aft cargo-door lining and the small repair patch is 45 degrees.
3 In each direction, the small repair patch is 42.5 mm (1.67 in.) larger than the damaged area (dimension E + D/2).
(e) Apply a smooth layer of Laminating resin-Epoxy Fire compliant - (Material No.13EBK1) on the small repair patch and the prepared area.
(f) Make sure that the area with the epoxy resin has the same size as the large repair patch.
(g) Put the large repair patch in position.
(h) Make sure that:
1 The fiber of the aft cargo-door lining glass-fabric is in the correct direction.
2 The angle between the glass fabric layer of the aft cargo-door lining and the large repair patch is 0 or 90 degrees.
3 In each direction, the large repair patch is 15 mm (0.59 in.) larger than the small repair patch (dimension D).
(9) On the rear and front of the aft cargo-door lining, attach the BAG - VACUUM around the large repair patches.
(10) Let the resin cure for 2.5 hours at 66 deg.C (150.80 deg.F) with a vacuum pressure of 0.6 bar (8.70 psi).
(11) Remove the BAG - VACUUM.

CAUTION: BE CAREFUL NOT TO APPLY TOO MUCH FORCE ON THE ABRASIVE CLOTH WHEN YOU MAKE THE REPAIRED AREA SMOOTH. IF YOU USE TOO MUCH FORCE, YOU CAN CAUSE DAMAGE TO THE GLASS PLY.

(12) Carefully make the repaired area smooth with the CLOTH - ABRASIVE (GRADE 120-180).
(13) Install the blind rivets on the front of the aft cargo-door lining:
(a) Make marks to identify the correct positions of the blind rivets.
(b) Make sure that:
1 You make a minimum of three marks.

NOTE: This is to make sure that you attach each repair patch with a minimum of three blind rivets.

2 The distance between the heads of the blind rivets and the parts of the cargo door structure is 6.40 mm (0.25 in.) minimum.
3 You do not make marks in the areas with a radius of less than 100 mm (3.94 in.).
4 The distance of all the marks is the same and between 20 mm (0.79 in.) and 50 mm (1.97 in.) (dimension A).
(c) At each mark, drill holes through the repair patches and the aft cargo-door lining.
(d) Make sure that the diameter of the holes is the same as the diameter of the blind rivets that you use (3.2 mm (0.13 in.) or 4 mm (0.16 in.)).
(e) Remove all the loose particles and the dust from around the holes.
(f) Clean the area around the holes with the Non Aqueous Cleaner-- Isopropyl Alcohol - (Material No.08BBD1) and the Textile-Lint free Cotton - (Material No.14SBA1) .
(g) Let the area dry for a minimum of 15 minutes.
(h) Put a washer (for example, the ASNA 0113-32) at each hole, on each side of the aft cargo-door lining.
(i) Install each blind rivet (for example, NAS 1919 C04), with the GUN - FASTENER, on the front of the aft cargo-door lining.
(14) Install the blind rivets on the rear of the aft cargo-door lining:
(a) If possible, do not install the blind rivets in the area with Velcro tape.
(b) Make marks to identify the correct positions of the blind rivets.
(c) Make sure that:
1 You make a minimum of three marks.

NOTE: This is to make sure that you attach each repair patch with a minimum of three blind rivets.

2 When the aft cargo door is closed, the distance between the heads of the blind rivets, the door frame lining and the cargo loading system is 25.4 mm (1.00 in.) minimum.
3 When the aft cargo door is closed, the distance between the heads of the blind rivets and the cargo container is 50.8 mm (2.00 in.) minimum.
4 You do not make marks in the areas with a radius of less than 100 mm (3.94 in.).
5 The distance of all the marks is the same and between 20 mm (0.79 in.) and 50 mm (1.97 in.) (dimension A).
(d) At each mark, drill holes through the repair patches and the aft cargo-door lining.
(e) Make sure that the diameter of the holes is the same as the diameter of the blind rivets that you use (3.2 mm (0.13 in.) or 4 mm (0.16 in.)).
(f) Remove all the loose particles and the dust from around the holes.
(g) Clean the area around the holes with the Non Aqueous Cleaner-- Isopropyl Alcohol - (Material No.08BBD1) and the Textile-Lint free Cotton - (Material No.14SBA1) .
(h) Let the area dry for a minimum of 15 minutes.
(i) Put a washer (for example, ASNA 0113-32) at each hole, on each side of the aft cargo-door lining.
(j) Install each blind rivet (for example, NAS 1919 C04), with the GUN - FASTENER, on the front of the aft cargo-door lining.
(15) Install a spacer around each blind rivet on the rear of the aft cargo-door lining:
(a) Make a 3 mm (0.12 in.) minimum thick spacer with the Adhesive Film Tape-- Film PTFE - (Material No.05RAJ9) .
(b) Make sure that:
1 Each spacer has a width of 22 mm (0.87 in.) minimum (dimension H).
2 The diameter of the hole of each spacer is between 11 mm (0.43 in.) and 12 mm (0.47 in.) (dimension K).
3 The spacer is 0.5 mm (0.02 in.) longer than the head of the blind rivet (dimension J).
(c) Apply the Pore Filler Polyurethane-- - Furnishing (Material No.04BAM6) and the Top Coat Polyurethane-- Decorative Furnishing (Material No.04JMD9) on the area around the holes to repair the surface protection.
(d) Clean the area around the holes with the Non Aqueous Cleaner-- Isopropyl Alcohol - (Material No.08BBD1) and the Textile-Lint free Cotton - (Material No.14SBA1) .
(e) Let the area dry for a minimum of 15 minutes.
(f) Put a spacer around each blind rivet and bond it to the aft cargo-door lining.
(g) Make sure that the spacers do not touch the blind rivets.
(16) Complete the repair as follows:
(a) Apply the Pore Filler Polyurethane-- - Furnishing (Material No.04BAM6) and the Top Coat Polyurethane-- Decorative Furnishing (Material No.04JMD9) on the repaired area, on each side of the aft cargo-door lining (this includes the heads of the rivets and the washers).

NOTE: This is to repair the surface protection of the aft cargo-door lining.

NOTE: You can use only the Top Coat Polyurethane-- Decorative Furnishing (Material No.04JMD9) , but the surface protection will not be as good as if you use the two materials.

(b) If necessary, repair or replace the Velcro hook tape (ABS1133D) or the Velcro loop tape (ABS1133C) on the aft cargo-door lining or the cargo door structure:
1 Clean the bonding area with the Non Aqueous Cleaner-- Isopropyl Alcohol - (Material No.08BBD1) and the Textile-Lint free Cotton - (Material No.14SBA1) .
2 Apply the Adhesive Primer-Pressure Sensitive Adhesive - - (Material No.05WBA1) with the PAINTBRUSH on the bonding area.
3 Apply pressure with your hand to bond the loop tape or the hook tape on the aft cargo-door lining or the door structure.
(17) Install the applicable insulation mat:
(a) Clean the repaired area with the Non Aqueous Cleaner-- Isopropyl Alcohol - (Material No.08BBD1) and the Textile-Lint free Cotton - (Material No.14SBA1) .
(b) Let the area dry for a minimum of 15 minutes.
(c) Install the applicable insulation mat on the repaired aft cargo-door lining.
(d) If necessary, make cutouts in the insulation mat for the heads of the rivets.
(18) Weigh the insulation mat (for example, with sandbags) for 24 hours at room temperature before you install the aft cargo-door lining.

5. Close-up
Subtask 52-32-13-410-051-A

A. Close Access
(1) Make sure that the work area is clean and clear of tools and other items.
(2) Install the repaired cargo door lining (Ref. AMM TASK 52-32-13-400-001).
(3) Remove the 98D52307515000 SAFETY LOCK-ACTUATOR,CARGO DOORS from the door actuator (Ref. AMM TASK 52-30-00-080-001).
(4) Close the aft cargo-compartment door (Ref. AMM TASK 52-30-00-860-002).
(5) Remove the access platform(s).

[Rev.10 from 2021] 2026.04.02 07:23:20 UTC