AIRCRAFT
Standard
Practices/Structures
DA 42 NG AMM
Page 4
15 Mar 2018
51-10-00
Doc # 7.02.15
Rev. 4
5. Further Inspection
If you find damage to the paint when you examine a composite structure then do this further inspection.
Find a way to see the inside of the structure or component. If necessary, remove panels (or other
components), or you can use remote viewing equipment. For example, remove a winglet to see inside
the wing. If you can see damage inside the component or structure you must do a repair.
Remove the paint coat in the area that you think is damaged. Remove the paint coat carefully, you
must not damage the surface under the paint coat.
Look carefully at the surface under the paint coat. Push the middle of the area to be tested with your
thumb. If you can feel the skin hitting against the core of the sandwich (or other layer/component) then
the skin is disbonded and you must repair the structure.
In some cases you may need to cut inspection holes in the structure to do the test correctly. If you
must make inspection holes then you must contact Diamond Aircraft Industries for advice.
6. Debris Protection Inspection (OÄM 42-088a, OÄM 42-089a, OÄM 42-090a)
A. Single and Triple Layer Adhesive Foil Debris Protection (OÄM 42-088a, OÄM 42-089a)
Even small holes or buckling deeper than 1.5 mm (0.06 in) in this layer have an adverse effect on
its tensile strength. A proper protection of the fuselage cannot be ensured and therefore the debris
protection must be replaced. Visually inspect the fuselage skin underneath during replacement.
Refer to Section 51-10 for classification and repair of a probable fuselage damage. Scratches and
little damages in the border area are acceptable. If damage occurs outside of the debris protection
check position or contact the airplane manufacturer.
A replacement by a composite debris protection is possible.
B. Composite Debris Protection (OÄM 42-090a)
The composite debris protection should be replaced if damage occurs. If damage exceeds 50 mm
(2 in) in diameter, the debris protection must be replaced and the fuselage skin underneath must
be inspected. Refer to Section 51-10 for classification and repair of a probable fuselage damage.
A replacement by adhesive foil debris protection is possible.
Summary of Contents for DA 42 NG
Page 933: ...AIRCRAFT DA 42 NG AMM Fuel Doc 7 02 15 Rev 4 28 TITLE Page 1 15 Mar 2018 CHAPTER 28 FUEL ...
Page 1459: ...AIRCRAFT DA 42 NG AMM Lights Doc 7 02 15 Rev 4 33 TITLE Page 1 15 Mar 2018 CHAPTER 33 LIGHTS ...
Page 1711: ...AIRCRAFT DA 42 NG AMM Doors Doc 7 02 15 Rev 4 52 TITLE Page 1 15 Mar 2018 CHAPTER 52 DOORS ...
Page 1853: ...AIRCRAFT DA 42 NG AMM Wings Doc 7 02 15 Rev 4 57 TITLE Page 1 15 Mar 2018 CHAPTER 57 WINGS ...
Page 2071: ...AIRCRAFT DA 42 NG AMM Engine Doc 7 02 15 Rev 4 72 TITLE Page 1 15 Mar 2018 CHAPTER 72 ENGINE ...
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