Refurbishment of Lavatory Interior Parts

TASK 25-20-00-370-003-A
Refurbishment of Lavatory Interior Parts

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	CLOTH-EMERY (GRADE 320 - 400)
No specific	AR	GAGE-THICKNESS, PAINT BORER 518
No specific	AR	GUN - AIR SPRAY, STANDARD PAINT
No specific	AR	PAINTBRUSH

B. Consumable Materials

REFERENCE	DESIGNATION
(Material No.04JMD9)	Top Coat Polyurethane-- Decorative Furnishing
(Material No.08BBD1)	Non Aqueous Cleaner-- Isopropyl Alcohol -
(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

3. Job Set-up
Subtask 25-20-00-861-054-A

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

4. Procedure

CAUTION: MAKE A RECORD OF THE REFURBISHMENT OF EACH COMPONENT TO MAKE SURE THAT THIS DATA IS AVAILABLE FOR SUBSEQUENT REFURBISHMENTS. IF THIS DATA IS MISSING, IT IS POSSIBLE THAT THE SUBSEQUENT REFURBISHMENT WILL NOT AGREE WITH THE FLAMMABILITY REQUIREMENTS.

Subtask 25-20-00-370-060-B

A. Painting of the Lavatory Interior Parts
(1) Do a visual inspection of the components. Obey the MAINTENANCE HISTORY DATA, if available.

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) If a paint layer is applied, measure the paint layer thickness with the GAGE-THICKNESS, PAINT BORER 518 and do a check if the maximum paint layer thickness is 90 micrometers.

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

(3) If the paint layer thickness is more than 90 micrometers, carefully remove the unwanted paint with the CLOTH-EMERY (GRADE 320 - 400). Make sure that the maximum paint layer thickness is 90 micrometers.
(4) Carefully sand the surfaces with the CLOTH-EMERY (GRADE 320 - 400).
(5) Clean the surfaces with Non Aqueous Cleaner-- Isopropyl Alcohol - (Material No.08BBD1) and Textile-Lint free Cotton - (Material No.14SBA1) .
(6) Apply a layer of minimum 15 micrometers of Top Coat Polyurethane-- Decorative Furnishing (Material No.04JMD9) with a maximum of 25 micrometers to the surface with the GUN - AIR SPRAY, STANDARD PAINT or PAINTBRUSH.

NOTE: The paint layer thickness must be between 50 and 90 micrometers.

NOTE: For A318/A319/A320/A321, only these top coats are permitted: ALEXIT FST 404-12, ALEXIT FST 346-55, FRS40 and FR2/55.

(7) Obey the manufacture's instructions and the Technical Data Sheet (TDS). Let the paint dry at a temperature of 23 +2 deg.C or -2 deg.C (73.40 +3.60 deg.F or -3.60 deg.F) and a relative humidity of 45-55% for:

5-30 minutes if it must be dry against dust
5-8 hours if it must be dry for transport
12 hours if it must be dry for installation.

5. Close-up
Subtask 25-20-00-862-054-A

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

[Rev.10 from 2021] 2026.03.31 23:29:48 UTC