AIRCRAFT
DA 42 NG AMM
Hydraulic Power
Doc # 7.02.15
Rev. 4
29-10-00
Page 233
15 Mar 2018
D. Checklist for External Leakage
Note:
Check the hydraulic hoses on the hydraulic kit which is installed in the back of the
fuselage. Also check the connections of the hoses on the hydraulic control block
and on the hydraulic actuators visually for leak-tightness.
Checkpoint
Set-point
Leakage on the fittings of the hydraulic kit.
No leakage.
Leakage on the hose connections of the manifold
and control block.
No leakage.
Leakage on the hose connections of the
hydraulic actuators.
No leakage.
Leakage on the piston seal of the hydraulic
actuator.
No drop formation allowed.
Maximum a little amount of dried fluid on the
cylinder head respectively on the piston rod
end.
Note:
After fixing a leakage on the fittings or hose connections a leak tightness test has
to be done.
(1) External Leakage
In general you should check if there is any damage of the piston of the hydraulic actuator when
the landing gear is retracted. (Refer to Section 32-30 Landing Gear Extension and Retraction
Test). Look for scratches, bumps, grooves or any other physical damage. If there are any
damages in the range of the piston seal the hydraulic actuator piston has to be replaced. (Refer
to Section 29-10)
If a hydraulic actuator has a major leakage (drop formation visible) send the hydraulic actuator
to the vendor for a repair.
If a hydraulic actuator has a minor leakage (a little amount of dried fluid, no drop formation)
perform a detailed check.
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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