Wiring and interior: sheet metal edge protection material

[lithium366]

i recently pulled an interior for an inspection an coax cable replacement and noticed sheet metal edges covered with some sort of foam  where they in contact with wires. Does anyone know what this is and where to buy because mine already deteriorated and compromise safety especially where they meet battery cable (my battery is in the back)

Is this sort of protection still acceptable per modern standards? I didn’t see anything like this in  FAA EWIS ACs

 

 

[carusoam]

There are a few anti-abrasion edge protectors that get used…

Often found in circular holes… that clip in place.

Most likely nylon based….

PP guesses while we wait for a good answer… 

-a-

[jaylw314]

Your looking for "wire grommet" material:

https://www.aircraftspruce.com/catalog/appages/grommetedging.php?clickkey=252834

Supposedly you don't need to glue it like it is suggested in the AC 43.13-1b, but it's probably still a good idea

Foam jammed under the wire probably doesn't qualify as an acceptable method

 

Edited February 6, 2022 by jaylw314

[PT20J]

1 hour ago, jaylw314 said:

Your looking for "wire grommet" material:

https://www.aircraftspruce.com/catalog/appages/grommetedging.php?clickkey=252834

Supposedly you don't need to glue it like it is suggested in the AC 43.13-1b, but it's probably still a good idea

Foam jammed under the wire probably doesn't qualify as an acceptable method

 

I got some of that and it works great. No glue required 

[47U]

16 hours ago, lithium366 said:

i recently pulled an interior for an inspection an coax cable replacement and noticed sheet metal edges covered with some sort of foam  where they in contact with wires. Does anyone know what this is and where to buy because mine already deteriorated and compromise safety especially where they meet battery cable (my battery is in the back)

Nice job recognizing the potential for chafing.  

In a pinch, I’ve removed the cushion from an adel clamp and cut it to fit the offending sheet metal edge.  RTV may work as a suitable adhesive, or Gorilla glue works pretty good (GG works on the ‘wire grommet’ material stuff, too).  

[A64Pilot]

20 hours ago, jaylw314 said:

Your looking for "wire grommet" material:

https://www.aircraftspruce.com/catalog/appages/grommetedging.php?clickkey=252834

Supposedly you don't need to glue it like it is suggested in the AC 43.13-1b, but it's probably still a good idea

Foam jammed under the wire probably doesn't qualify as an acceptable method

 

AKA Caterpiller, works good for holes.

On tubing I’ve used fire sleeve secured with safety wire in the engine compt and outside of it I’ve used “spiral wrap”, looks like someone took a nylon tube and cut it in a spiral direction.

Who knew that's what it’s actually called?

https://www.aircraftspruce.com/catalog/pnpages/11-12314.php?gclid=Cj0KCQiAgP6PBhDmARIsAPWMq6l7x_bi-GCWxvFGdvV5ZFSllkP8veapZzvQMUV0wt38DFjNGeC27vQaAthIEALw_wcB

I prefer whenever possible to use something that won’t burn, I’ve even seen sheet cork like what you buy to cut gaskets with used and secured with tie wraps, but I like the spiral wrap better.

Having said that I have also seen engine mount tubes cut almost completely through with a tie wrap too, a little oil and dirt and that tie wrap can cut like a saw, so don’t put tie wraps on engine mount tubes.

Edited February 6, 2022 by A64Pilot