patching deice boots

[. .]

Hey,

There was questions raised as to the maximum amount of patches a deice boot can have on it. I've been told by the DOM at my last company that you can have as many as you want as long as the patches don't overlap. Can anyone confim or deny this?

thanks.

[grouchy]

That's what I understood.
Also they can't be "hanging" at the edges.

[mi26]

That is incorrect. One should refer to the MM. I believe on the Dash-8,s the figure was 6 on any one boot. Do not know about other a/c

[. .]

so I assume that it's more of a type specific rather than a general limit for all boots then?

[Spinner]

Goodrich has a Pneumatic de-icer installation, maintenance and repair manual (ATA30-10-31)

It lists Goodrich's limits as far as patches go. Here is just a quick look. They are based on a 12" square:

'the following patch limits are recommended'

3 small patches per square (2-1/2 X 1-1/4) or
2 medium patches (5" X 2-/12) or
1 large patch (5" X 10") or
2 small patches and 1 medium patch per square

It is recommended that no more that 20 pinhole repairs (less than 1/16" in diameter repaired with pinhole kit) per 12" square.

I think you can download this manual at Goodrich's site.

[. .]

good info, thanks very much.

[Spinner]

http://apps.goodrich.com/bfgmi/gr_pdf_d ... o=30-10-31

should be the link to the booklet I hope. If not it is on goodrich's site.

[gkk]

If my memory serves me correctly, in the MM for the B1900, the limits stated could be interpreted to mean that one could virtually cover the whole length of the boot with the smallest height patches.

[Jeremy]

I didn't know they made duct tape in 5 X 10" pieces...
Good idea though; those duct tape genuises never stop!

RJ.