The Radiorax avionics support strut installation kit provides a straightforward retrofit for almost any aircraft.
This installation manual from Radiorax Aviation Systems covers the RK2025-X Dual Stack, Reduced Outer + Reduced Center Rail Tray Mount Kit (document P/N RKD2025-2, revision A, dated August 21, 2003). The Radiorax avionic support strut installation kit provides a retrofit for installing dual avionics stacks in almost any aircraft.
The manual lists related kit documents (packing list, parts manual RKD2025-3, instructions for continued airworthiness, and STC front sheet SA01330LA), gives general notes on strut spacing, part tagging, drilling, and grounding, and provides step-by-step instructions for removing existing support struts and assembling and installing the new avionics support struts and trays.
| Strut inside spacing | 6.30 inches between strut faces |
|---|---|
| Avionics bay cutout basis | 6.25" wide cutout with 0.025" lip |
| Structural mounting screws | NAS514P632-4P (item 7) |
| Fastener hole preparation | #36 drill hole, 6-32 tap |
| Maximum screw spacing (existing holes) | <= 2.50" |
| Included sliding nut hardware | Enough for 12 sliding nut assemblies in each slot |
The distance between the faces (inside dimension) of installed support struts must be 6.30 inches, which provides maximum compatibility with avionic trays.
Drill a #36 hole at each fastener location and thread each hole with a 6-32 tap.
No, back-strapping is not necessary because the struts use countersunk screws and dimpled screw receptacles, provided the struts bear the ultimate load factors of the aircraft.
Use the Radiorax RT400 Rail Installation Spacer (RK400 Installation Spacer Tool) to lock the struts together and install them as an assembly.