obsidian_lht/Paint Damage.md

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2023-12-19T22:46	2023-12-19T22:46

SPM 51-75-12 PAINT REPAIR PROCEDURE DURING MAINTENANCE

References

Table 1

Responsible Engineer	Oliver Untucht, FRA T/FS32A Thorsten Koch, FRA T/FS32A
Approval  Document:	CRAS 00158525 / 001

1. General

This procedure contains information about paint repair requirements for aircraft outer surface paint repair during maintenance.

2. Definitions

A. Touch up repair

Touch up is defined as a repair method for paint damages with a size less than one square meter. This work can be performed with a usage of brushes or paint roll.

B. Partial repaint

Partial repaint is defined as repaint of paint delamination or damage on the aircraft outer surface on an area greater than one square meter like one entire skin panel or vertical stabilizer repaint. This work should be performed with the usage of air brush tools but can also be performed with brushes or paint roll if the usage of air brush tools is not possible (e.g. not allowed inside the hanger). The paint build up should be repaired according the paint build up already applied in this area.

3. Applicable paint repair

Find out the paint damage number in the Paint damage chart Fig 1 and Fig 2 by following the instructions:

A.

Choose the applicable characteristic for each topic (Primer, Paint defect, Size, Surface Material) in the Paint damage chart.

! ICN-LHTSPM-AAAA-517512-A-C1008-00001-A-002-01

Fig 1 - Paint damage chart

! ICN-LHTSPM-AAAA-517512-A-C1008-00002-A-001-01

Fig 2 - Paint damage chart

B.

Note the number, which is given under the chosen damage characteristic of each topic.

C.

To get the paint damage number write the number for each topic one after another and eliminate the “X”. For example: (1.X.X.X)+(X.1.X.X)+(X.X.1.X)+(X.X.X.1)=(1.1.1.1)

D.

Find the applicable repair and the time limit in Table 2 by using the paint damage number.

Table 2 - Allocation table for applicable paint repair

Paint damage number:	Applicable repair:	Repair within:
1.1.1.1 1.1.1.2 1.3.1.1 1.3.1.2 1.5.1.1 1.5.1.2	Perform a Touch up repair according 4.A	6 months
2.1.1.1 2.3.1.1 2.5.1.1	Perform a Touch up repair according 4.B	30 days
2.1.1.2 2.3.1.2 2.5.1.2	Perform a Touch up repair according 4.C	30 days
1.1.2.1 1.1.2.2 1.3.2.1 1.3.2.2 1.5.2.1 1.5.2.2	Perform a Partial repaint according 4.A	6 months
1.2.1.1 1.2.2.1 2.1.2.1 2.2.1.1 2.2.2.1 2.3.2.1 2.5.2.1	Perform a Partial repaint according 4.B	30 days
1.2.1.2 1.2.2.2 1.4.1.2 1.4.2.2 2.1.2.2 2.2.1.2 2.2.2.2 2.3.2.2 2.4.1.2 2.4.2.2 2.5.2.2	Perform a Partial repaint according 4.C	30 days

4. Paint material and application

There are three application procedures that can be used for paint repairs during routine maintenance

A. Reapplication of topcoat

This procedure can be used for touch up and partial repaint work if only the topcoat is damaged and the primer is completely undamaged. !

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