Refurbishment of Cargo Compartment Linings

TASK 25-50-00-370-001-A
Refurbishment of Cargo Compartment Linings

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

WARNING: DO NOT GET THE FLUID ON YOUR SKIN OR IN YOUR EYES. IF YOU DO:

FLUSH IT AWAY WITH CLEAN WATER
GET MEDICAL AID.

CAUTION: USE ONLY THE SPECIFIED MATERIALS AND OBEY THE INSTRUCTIONS FROM THE MATERIAL MANUFACTURERS. OTHER MATERIALS CAN CAUSE DAMAGE TO THE SURFACE PROTECTION OF THE COMPONENTS AND THE RELATED AREA.

CAUTION: THIS REFURBISHMENT PROCEDURE IS ONLY APPLICABLE FOR ORIGINAL-EQUIPMENT-MANUFACTURER SANDWICH PANELS WITH TEDLAR SURFACE.

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	CLOTH-EMERY (GRADE 320 - 400)
No specific	1	GAGE-THICKNESS, PAINT BORER 518
No specific	1	GUN - AIR SPRAY, STANDARD PAINT
No specific	2	PAPER - MASKING
No specific	2	TAPE - MASKING

B. Consumable Materials

REFERENCE	DESIGNATION
(Material No.04JMD9)	Top Coat Polyurethane-- Decorative Furnishing
(Material No.08BBD1)	Non Aqueous Cleaner-- Isopropyl Alcohol -
(Material No.14FAB1)	Abrasive-- Scotch Brite Pads -
(Material No.14SBA1)	Textile-Lint free Cotton -

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 25-50-00-200-024-A	Cargo Compartment Linings with Honeycomb Core - General Repair/Protection Information
TASK 25-54-11-000-001-A	Removal of the Forward Cargo-Compartment Partition FR24A
TASK 25-54-11-400-001-A	Installation of the Forward Cargo-Compartment Partition FR24A
TASK 25-54-12-000-001-A	Removal of the Forward Cargo-Compartment Partition
TASK 25-54-12-000-002-A	Removal of the Ceiling Panels in the Forward Cargo Compartment
TASK 25-54-12-000-003-A	Removal of the Sidewall Panels in the Forward Cargo Compartment
TASK 25-54-12-400-001-A	Installation of the Forward Cargo-Compartment Partition
TASK 25-54-12-400-002-A	Installation of the Ceiling Panels in the Forward Cargo Compartment
TASK 25-54-12-400-003-A	Installation of the Sidewall Panels in the Forward Cargo Compartment
TASK 25-55-11-000-001-A	Removal of the Aft Cargo-Compartment Partition at FR47
TASK 25-55-11-000-002-A	Removal of the Ceiling Panels in the Aft Cargo-Compartment - FR47/FR59
TASK 25-55-11-000-003-A	Removal of the Sidewall Panels in the Aft Cargo Compartment - FR47/FR59
TASK 25-55-11-400-001-A	Installation of the Aft Cargo-Compartment Partition at FR47
TASK 25-55-11-400-002-A	Installation of the Ceiling Panels in the Aft Cargo-Compartment - FR47/FR59
TASK 25-55-11-400-003-A	Installation of the Sidewall Panels in the Aft Cargo Compartment - FR47/FR59
TASK 25-55-12-000-001-A	Removal of the Aft Cargo-Compartment Partition at FR65
TASK 25-55-12-000-002-A	Removal of the Ceiling Panels in the Aft Cargo Compartment at FR59/FR65
TASK 25-55-12-000-003-A	Removal of the Sidewall Panels in the Aft Cargo Compartment - FR59/FR65
TASK 25-55-12-400-001-A	Installation of the Aft Cargo-Compartment Partition at FR65
TASK 25-55-12-400-002-A	Installation of the Ceiling Panels in the Aft Cargo Compartment at FR59/FR65
TASK 25-55-12-400-003-A	Installation of the Sidewall Panels in the Aft Cargo Compartment - FR59/FR65
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 52-30-00-860-006-A	Open the Bulk Cargo-Compartment Door
TASK 52-30-00-860-008-A	Close the Bulk Cargo-Compartment Door

3. Job Set-up
Subtask 25-50-00-860-080-A

A. Aircraft Maintenance Configuration
(1) Energize the ground service network
(Ref. AMM TASK 24-42-00-861-001).
(2) For the forward or the aft cargo compartment:
(a) Open the forward or the aft cargo-compartment door (Ref. AMM TASK 52-30-00-860-001).
(b) Set the related cargo compartment light switch 6LU or 8LU to the ON position.
(3) For the bulk cargo compartment:
(a) Open the bulk cargo-compartment door (Ref. AMM TASK 52-30-00-860-006).
(b) Set the bulk cargo compartment light switch 18LU to the ON position.

Subtask 25-50-00-910-051-A

B. Preparation for Painting
(1) Remove the related sidewall panel(s), ceiling panel(s) and partition wall panel(s):
(a) For the lower-deck forward cargo-compartment (Ref. AMM TASK 25-54-11-000-001) (Ref. AMM TASK 25-54-12-000-001) (Ref. AMM TASK 25-54-12-000-002) (Ref. AMM TASK 25-54-12-000-003).
(b) For the lower-deck aft cargo-compartment (Ref. AMM TASK 25-55-11-000-001) (Ref. AMM TASK 25-55-11-000-002) (Ref. AMM TASK 25-55-11-000-003).
(c) For the lower-deck bulk cargo-compartment (Ref. AMM TASK 25-55-12-000-001) (Ref. AMM TASK 25-55-12-000-002) (Ref. AMM TASK 25-55-12-000-003).

CAUTION: DO NOT CAUSE DAMAGE TO THE SURFACE OF THE COMPOSITE MATERIAL WHEN YOU REMOVE THE PAINT COATING WITH ABRASIVE PAPER.

CAUTION: MEASURE THE THICKNESS OF THE PAINT ON THE SURFACES OF THE COMPONENT BEFORE YOU PAINT THEM AGAIN. PAINT THAT IS TOO THICK INCREASES THE WEIGHT AND THE FLAMMABILITY PROPERTIES OF THE AIRCRAFT.

(2) Make sure that the related sidewall panel(s), ceiling panel(s) and partition wall panel(s) are clean and in the correct condition:
(a) Clean the related sidewall panel(s), ceiling panel(s) and partition wall panel(s) with Non Aqueous Cleaner-- Isopropyl Alcohol - (Material No.08BBD1) and a Textile-Lint free Cotton - (Material No.14SBA1) .
(b) If necessary, repair the panels (Ref. AMM TASK 25-50-00-200-024).
(c) If the panels have a tedlar layer, make the surface rough with Abrasive-- Scotch Brite Pads - (Material No.14FAB1) .
(d) If the panels are painted:

With a CLOTH-EMERY (GRADE 320 - 400), remove the loose paint or surface blemish until the area is flat and smooth
With the GAGE-THICKNESS, PAINT BORER 518, measure the thickness of the paint on the surfaces of the component before you paint them again. Make sure that the total thickness after the refurbishment (paint, including previous layers) is not more than 60 micrometers
To identify the surface of the panel, clean it with Non Aqueous Cleaner-- Isopropyl Alcohol - (Material No.08BBD1) and a Textile-Lint free Cotton - (Material No.14SBA1) .

NOTE: The cleaner will dissolve the paint.

(3) With the PAPER - MASKING and TAPE - MASKING, protect all components to prevent over-spray during painting procedure.
The paint application is not allowed on:

The placards
The sealing- and fire-blocking strips
The decompression frames
The studs and washers
The repair patches (metal patches are permitted)
The pressure equalization valves
The stays, footsteps and hinges
The covers and stripes.

(4) Clean the related sidewall panel(s), ceiling panel(s) and partition wall panel(s) with Non Aqueous Cleaner-- Isopropyl Alcohol - (Material No.08BBD1) and a Textile-Lint free Cotton - (Material No.14SBA1) .

4. Procedure
Subtask 25-50-00-370-050-A

A. Painting of the Sidewall Panel(s), Ceiling Panel(s) and Partition Wall Panel(s) of the Forward, the Aft and the Bulk Cargo Compartments

CAUTION: DO NOT APPLY PAINT TO THE REPAIR PATCH SURFACE. IF YOU DO, THE FLAMMABLE PROPERTIES OF THE REPAIR PATCH WILL INCREASE.

(1) Make sure that you do not mix the water-based products with the solvent-based products during the refurbishment and the drying time.
(2) Apply a layer of Top Coat Polyurethane-- Decorative Furnishing (Material No.04JMD9) with a maximum thickness of 0.06 mm (0.00 in.) to the surface with a GUN - AIR SPRAY, STANDARD PAINT.
(3) Let the paint dry at a temperature of 23 -2 DEG.C or +2 DEG.C (73.4 -3.6 DEG.F or +3.6 DEG.F) and a relative humidity of 45-55% for:

5-20 minutes if it must be dry away from dust
5-8 hours if it must be dry for transport
10-14 hours before installation.

(4) If necessary, install the removed components (refer to the related definition dossier).
(5) If necessary, remove PAPER - MASKING and TAPE - MASKING on the related attachments.
(6) Install the related sidewall panel(s), ceiling panel(s) and partition wall panel(s):
(a) For the lower-deck forward cargo-compartment (Ref. AMM TASK 25-54-11-400-001) (Ref. AMM TASK 25-54-12-400-001) (Ref. AMM TASK 25-54-12-400-002) (Ref. AMM TASK 25-54-12-400-003).
(b) For the lower-deck aft cargo-compartment (Ref. AMM TASK 25-55-11-400-001) (Ref. AMM TASK 25-55-11-400-002) (Ref. AMM TASK 25-55-11-400-003).
(c) For the lower-deck bulk cargo-compartment (Ref. AMM TASK 25-55-12-400-001) (Ref. AMM TASK 25-55-12-400-002) (Ref. AMM TASK 25-55-12-400-003).
(7) Make sure that the paint layer can dry fully for 10 days at room temperature.
(8) Make sure that you do not sand or paint the paint layer during this time.

5. Close-up
Subtask 25-50-00-860-081-A

A. Put the aircraft back to its initial configuration.
(1) Make sure that the work area is clean and clear of tools and other items.
(2) For the forward or the aft cargo compartment:
(a) Set the related cargo compartment light switch 6LU or 8LU to the OFF position.
(b) Close the forward or the aft cargo compartment (Ref. AMM TASK 52-30-00-860-002).
(3) For the bulk cargo compartment:
(a) Set the bulk cargo compartment light switch 18LU to the OFF position.
(b) Close the bulk cargo-compartment door (Ref. AMM TASK 52-30-00-860-008).
(4) De-energize the ground service network
(Ref. AMM TASK 24-42-00-862-001).

[Rev.10 from 2021] 2026.04.02 06:14:20 UTC