IMHO you should use the snap bushings or other protective device wherever a wire, tube or hose passes through a piece of sheet metal. Anything that can vibrate, or move around and damage itself or the part it is penetrating.
For larger holes, use
caterpillar grommet.
Rubber grommets can be used also.
Snap bushings are cheap, and you can get them in assortments from
Stein Also, you can order them from
ACS.
__________________
Mike Starkey
VAF 909
Rv-10, N210LM.
Flying as of 12/4/2010
Phase 1 done, 2/4/2011
Sold after 240+ wonderful hours of flight.
"Flying the airplane is more important than radioing your plight to a person on the ground incapable of understanding or doing anything about it."
Tip: Wire, hose, tubing pass through protection
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