oil-struts opening windows cockpit Am54

Jeroen Jeltes

ref AM54 : 

Hi all Amaliens, the oil-pressure-struts  which open the cocpit windows have lost their oil.

Can anybody help me with advice :

can they be refurbished and refilled, and can i do this myself ?

if i need to order them for replacement,   what would be the length, stroke, and pressure?

Jeroen Jeltes.   sv Fidelis.
Am54 2009 bno 118 .

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