Repair of the Overhead-Stowage-Compartment (OHSC) Doors

TASK 25-20-00-340-802-A
Repair of the Overhead-Stowage-Compartment (OHSC) Doors

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

1. Reason for the Job
Self explanatory
2. Job Set-up Information
A. Fixtures, Tools, Test and Support Equipment

REFERENCE	QTY	DESIGNATION
No specific	AR	PAPER - ABRASIVE (GRADE 200)
No specific	AR	PAPER - MASKING
No specific	AR	SPATULA - NON METALLIC
No specific	AR	SYRINGE

B. Consumable Materials

REFERENCE	DESIGNATION
(Material No.05EML9)	Epoxy Adhesive-- - Legacy 1
(Material No.05RDA1)	Adhesive Film Tape-Masking - -
(Material No.08BAA9)	Non Aqueous Cleaner-General - -
(Material No.13ACA1)	Dry glass fabric-4H Satin 293 gsm - 143 style - -
(Material No.13EBC1)	Laminating resin-Epoxy SRM Type 2 -
(Material No.13EBK1)	Laminating resin-Epoxy Fire compliant -
(Material No.13FCA1)	Paste Adhesive-Polyester Filler -
(Material No.13FGE3)	Paste Adhesive-- Filler Furnishing
(Material No.13GBB3)	Low density compound-Fire compliant Low temperature curing Furnishing
(Material No.14SBA1)	Textile-Lint free Cotton -
No specific	Aluminium doubler (ABS 5044)
No specific	Prepreg doubler (ABS 5047-02)

C. Referenced Information

REFERENCE	DESIGNATION
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 25-20-00-340-003-A	Repair/Replacement of Decor Foil
TASK 25-20-00-370-006-A	Repair of the Paint Coat on Components
TASK 25-24-41-000-002-A	Removal of the Door of the Overhead Stowage-Compartment
TASK 25-24-41-400-002-A	Installation of the Door of the Overhead Stowage-Compartment
Damage Type 2
Damage Type 3
Damage Type 4
Damage Type 5

3. Job Set-up
Subtask 25-20-00-860-058-A ** ON A/C NOT FOR ALL

A. Energize the ground service network
(Ref. AMM TASK 24-42-00-861-001).

4. Procedure
Subtask 25-20-00-210-051-A ** ON A/C NOT FOR ALL

A. Identification of the Damage Limits

NOTE: The minimum distance between the damage and the latches or hinges must be more than 200 mm (7.9 in.).

(1) Damage type 1 (minor damage):

The maximum permitted diameter of the area of the damage must be 10 mm (0.4 in.).
The maximum number of minor damage on the OHSC door must be 10.
The maximum number of minor damage in an area of 100 mm x 100 mm (4 in. x 4 in.) must be 5.
The minimum distance between the damage must be more than 20 mm (0.8 in.).

(2) Damage type 2 (crack in the surface):

The maximum permitted length of the crack must be 30 mm (1.2 in.).
The maximum number of damage on the OHSC door must be 2.
The minimum distance between the damages must be more than 20 mm (0.8 in.).

(3) Damage type 3 (one-sided surface damage of OHSC door from inside of the OHSC with honeycomb damage):

The maximum permitted diameter of the area of the damage must be 100 mm (4.0 in.).
The maximum number of damage on the OHSC door must be 2.
The minimum distance between the damage must be more than 60 mm (2.4 in.).

(4) Damage type 4 (one-sided surface damage of OHSC door from outside of the OHSC or two-sided surface damage with honeycomb damage):

The maximum permitted diameter of the area of the damage must be 100 mm (4.0 in.).
The maximum number of damage on the OHSC door must be 2.
The minimum distance between the damages must be more than 60 mm (2.4 in.).

(5) Damage type 5 (damages in the edge areas):

The maximum permitted length of the damaged area parallel to the edge of the component must be 50 mm (2.0 in.).
The maximum permitted width of the damaged area from the component edge to both sides must be 10 mm (0.4 in.).
The maximum number of damage on the OHSC door must be 2.
The minimum distance between the damages must be more than 100 mm (4.0 in.).

Subtask 25-20-00-010-052-A ** ON A/C NOT FOR ALL

B. Preparation
(1) If necessary, remove the damaged OHSC door (Ref. AMM TASK 25-24-41-000-002).
(2) Carefully remove the decor layer from the damaged area:

Paint (Ref. AMM TASK 25-20-00-370-006)
Foil (Ref. AMM TASK 25-20-00-340-003).

Subtask 25-20-00-340-061-A ** ON A/C NOT FOR ALL

C. Repair of the OHSC Door (Damage Type 1)
(1) Clean the damaged area with Non Aqueous Cleaner-General - - (Material No.08BAA9) and Textile-Lint free Cotton - (Material No.14SBA1) .
(2) Use a SPATULA - NON METALLIC and apply Paste Adhesive-Polyester Filler - (Material No.13FCA1) to the surface of the repair area.
(3) Let the filler cure.
(4) Make the repair area smooth with a PAPER - ABRASIVE (GRADE 200) or finer.
(5) Clean the surface with Non Aqueous Cleaner-General - - (Material No.08BAA9) and Textile-Lint free Cotton - (Material No.14SBA1) .

Subtask 25-20-00-340-062-A ** ON A/C NOT FOR ALL

D. Repair of the OHSC Door (Damage Type 2)

Damage Type 2 ** ON A/C NOT FOR ALL

(1) Clean the damaged area with Non Aqueous Cleaner-General - - (Material No.08BAA9) and Textile-Lint free Cotton - (Material No.14SBA1) .
(2) Drill a hole approx. 5 mm (0.2 in.) dia. at the ends of the crack.
(3) Apply PAPER - MASKING and Adhesive Film Tape-Masking - - (Material No.05RDA1) around the area that you want to repair, if necessary.
(4) Use a SYRINGE to slowly put the Laminating resin-Epoxy SRM Type 2 - (Material No.13EBC1) (2) through the crack into the honeycomb core.
(5) Stop the syringe when the resin (2) comes out of the crack.
(6) Remove the masking paper and the masking tape, if applied.
(7) Remove the unwanted resin with Non Aqueous Cleaner-General - - (Material No.08BAA9) and Textile-Lint free Cotton - (Material No.14SBA1) .
(8) Let the resin (2) cure.
(9) Make the repair area smooth with a PAPER - ABRASIVE (GRADE 200) or finer.
(10) Clean the surface with Non Aqueous Cleaner-General - - (Material No.08BAA9) and Textile-Lint free Cotton - (Material No.14SBA1) .
(11) Use a SPATULA - NON METALLIC and apply Paste Adhesive-Polyester Filler - (Material No.13FCA1) (1) to the surface of the repair area.
(12) Let the filler (1) cure.
(13) Make the repair area smooth with a PAPER - ABRASIVE (GRADE 200) or finer.
(14) Clean the surface with Non Aqueous Cleaner-General - - (Material No.08BAA9) and Textile-Lint free Cotton - (Material No.14SBA1) .

Subtask 25-20-00-340-063-A ** ON A/C NOT FOR ALL

E. Repair of the OHSC Door (Damage Type 3)

Damage Type 3 ** ON A/C NOT FOR ALL

(1) Clean the damaged area with Non Aqueous Cleaner-General - - (Material No.08BAA9) and Textile-Lint free Cotton - (Material No.14SBA1) .
(2) Cut out the prepreg layer on the rear side of the panel (inside of the OHSC) along the edges of the damaged area.
(3) Cut out the damaged honeycomb core along the edges of the damaged area.
(4) Clean the surface with Non Aqueous Cleaner-General - - (Material No.08BAA9) and Textile-Lint free Cotton - (Material No.14SBA1) .
(5) Apply PAPER - MASKING and Adhesive Film Tape-Masking - - (Material No.05RDA1) around the area that you want to repair, if necessary.
(6) Fill the space of the removed honeycomb core with Low density compound-Fire compliant Low temperature curing Furnishing (Material No.13GBB3) (1).
(7) Install a doubler in the repaired area:
(a) For aluminium doubler:

apply Epoxy Adhesive-- - Legacy 1 (Material No.05EML9) in the area of installation
install an Aluminium doubler (ABS 5044) (2).

(b) For prepreg doubler:

apply Epoxy Adhesive-- - Legacy 1 (Material No.05EML9) in the area of installation
install a Prepreg doubler (ABS 5047-02) (2).

apply Laminating resin-Epoxy Fire compliant - (Material No.13EBK1) in the area of installation
install the doubler Dry glass fabric-4H Satin 293 gsm - 143 style - - (Material No.13ACA1) (2).

NOTE: The minimum thickness of the new prepreg or glasscloth doubler shall be the thickness of the top layer which is used for this component.

(8) Let the core filler and the adhesive cure.
(9) Remove the masking paper and the masking tape, if applied.
(10) Clean the surface with Non Aqueous Cleaner-General - - (Material No.08BAA9) and Textile-Lint free Cotton - (Material No.14SBA1) .

Subtask 25-20-00-340-064-A ** ON A/C NOT FOR ALL

F. Repair of the OHSC Door (Damage Type 4)

Damage Type 4 ** ON A/C NOT FOR ALL

(1) Clean the damaged area with Non Aqueous Cleaner-General - - (Material No.08BAA9) and Textile-Lint free Cotton - (Material No.14SBA1) .
(2) Cut out the prepreg layer on the front side of the door along the edges of the damaged area. Cut out the prepreg layer on the rear side of the panel up to 25.00 mm (1.0 in.) more than the edges of the damaged area.
(3) Cut out the damaged honeycomb core up to 25.00 mm (1.0 in.) more than the edges of the damaged area from the rear side of the door.
(4) Clean the surface with Non Aqueous Cleaner-General - - (Material No.08BAA9) and a Textile-Lint free Cotton - (Material No.14SBA1) .
(5) Apply PAPER - MASKING and Adhesive Film Tape-Masking - - (Material No.05RDA1) around the area that you want to repair, if necessary.
(6) Install a doubler in the repair area:
(a) For aluminium doubler:

apply Epoxy Adhesive-- - Legacy 1 (Material No.05EML9) in the area of installation
install an Aluminium doubler (ABS 5044) (2).

(b) For prepreg doubler:

apply Epoxy Adhesive-- - Legacy 1 (Material No.05EML9) in the area of installation
install a Prepreg doubler (ABS 5047-02) (2).

apply Laminating resin-Epoxy Fire compliant - (Material No.13EBK1) in the area of installation
install the doubler Dry glass fabric-4H Satin 293 gsm - 143 style - - (Material No.13ACA1) (2).

NOTE: The minimum thickness of the new prepreg or glasscloth doubler shall be the thickness of the top layer which is used for this component.

(7) Fill the space of the removed honeycomb core with Low density compound-Fire compliant Low temperature curing Furnishing (Material No.13GBB3) (1).
(8) Install a doubler in the repair area:
(a) For aluminium doubler:

apply Epoxy Adhesive-- - Legacy 1 (Material No.05EML9) in the area of installation
install an Aluminium doubler (ABS 5044) (3).

(b) For prepreg doubler:

apply Epoxy Adhesive-- - Legacy 1 (Material No.05EML9) in the area of installation
install a Prepreg doubler (ABS 5047-02) (3).

apply Laminating resin-Epoxy Fire compliant - (Material No.13EBK1) in the area of installation
install the doubler Dry glass fabric-4H Satin 293 gsm - 143 style - - (Material No.13ACA1) (3).

NOTE: The minimum thickness of the new prepreg or glasscloth doubler shall be the thickness of the top layer which is used for this component.

(9) Let the core filler and the adhesive cure.
(10) Clean the surfaces with Non Aqueous Cleaner-General - - (Material No.08BAA9) and a Textile-Lint free Cotton - (Material No.14SBA1) .
(11) Use a SPATULA - NON METALLIC and apply Paste Adhesive-- Filler Furnishing (Material No.13FGE3) (4) to the surface of the repair area.
(12) Let the filler cure.
(13) Remove the masking paper and the masking tape, if applied.
(14) Make the repair area smooth with a PAPER - ABRASIVE (GRADE 200) or finer.
(15) Clean the surface with Non Aqueous Cleaner-General - - (Material No.08BAA9) and Textile-Lint free Cotton - (Material No.14SBA1) .

Subtask 25-20-00-340-065-A ** ON A/C NOT FOR ALL

G. Repair of the OHSC Door (Damage Type 5)

Damage Type 5 ** ON A/C NOT FOR ALL

(1) Clean the damaged area with Non Aqueous Cleaner-General - - (Material No.08BAA9) and Textile-Lint free Cotton - (Material No.14SBA1) .
(2) Cut out the prepreg layer (1) and the honeycomb core (2) along the edges of the damaged area.
(3) Clean the surface with Non Aqueous Cleaner-General - - (Material No.08BAA9) and a Textile-Lint free Cotton - (Material No.14SBA1) .
(4) Apply PAPER - MASKING and Adhesive Film Tape-Masking - - (Material No.05RDA1) around the area that you want to repair, if necessary.
(5) Fill the space of the removed honeycomb core with Low density compound-Fire compliant Low temperature curing Furnishing (Material No.13GBB3) (3).
(6) Let the core filler (3) cure.
(7) Use a SPATULA - NON METALLIC and apply Paste Adhesive-- Filler Furnishing (Material No.13FGE3) (4) to the surface of the repair area.
(8) Let the filler (4) cure.
(9) Remove the masking paper and the masking tape, if applied.
(10) Make the repair area smooth with a PAPER - ABRASIVE (GRADE 200) or finer.
(11) Clean the damaged area with Non Aqueous Cleaner-General - - (Material No.08BAA9) and a Textile-Lint free Cotton - (Material No.14SBA1) .

Subtask 25-20-00-410-053-A ** ON A/C NOT FOR ALL

H. Put the aircraft back to its initial configuration.
(1) Apply the decor layer on the repaired area:

Paint (Ref. AMM TASK 25-20-00-370-006).
Foil (Ref. AMM TASK 25-20-00-340-003).

(2) If removed, install the repaired OHSC door (Ref. AMM TASK 25-24-41-400-002).
(3) Make sure that the work area is clean and clear of tools and other items.

5. Close-up
Subtask 25-20-00-860-059-A ** ON A/C NOT FOR ALL

A. De-energize the ground service network
(Ref. AMM TASK 24-42-00-862-001).

[Rev.10 from 2021] 2026.03.31 23:30:02 UTC