Telescoping fluid porting tube

An engine comprising:

• a mechanical assembly comprising a first structure, a second structure and a third structure, wherein the first structure is an engine base structure, the second structure is a transcowl, and the third structure is a variable area fan nozzle structure;
• an electro-hydraulic control system including:
• a power actuator mountable between the second structure and the third structure, the power actuator for moving the third structure,
• a telescoping fluid porting tube mountable between the first structure and the second structure for porting a fluid to the power actuator, and
• a control valve for controlling flow of the fluid through the telescoping fluid porting tube to the power actuator for effecting movement of the third structure,
• wherein the telescoping fluid porting tube has
• an outer tubular body having a proximal end for mounting to one of the first structure or the second structure, a distal end opposite the proximal end, and a tubular wall defining a chamber,
• a piston axially disposed in and axially translatable within the chamber and having oppositely disposed proximal and distal sides, and
• a telescopically movable piston rod having a first end connected to the distal side of the piston and a second end mountable to the other of the first structure or the second structure, the piston rod extending at least partially through the distal end of the outer tubular body and being radially inwardly spaced form the tubular wall, and the piston rod having a fluid passageway in fluidic communication with the chamber, the fluid passageway transferring fluid along a length of the piston rod,
• wherein the proximal side of the piston is isolated from any flow through the fluid passageway in the piston rod.