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Good preflight landing gear check - dual hydraulic
The system is supposed to be self-'burping.'
While on the ground, cycle gear handle down.
That pressurizes and cycles everything.
Better to find an issue before takeoff, than after.
It should pop back to neutral down position within around 4 sec when warm out.
In winter maybe 6-8 secs
If it takes much longer, the system may be low, and/or there is probably air in the system.
Top off until it drools out the bottom of the drain under front engine,
Wash rinse repeat.
It can take a while to burp itself happy.
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David Wartofsky
Potomac Airfield
10300 Glen Way
Fort Washington, MD 20744
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