PS Magazine - TB 43-PS-559
PS, The Preventative Maintenance Monthly
ISSUE 559
JUNE 1999
PS 559
35
JUN 99
irframe repairers, forget the “guess and hope” method when mixing fiberglass
resins and structural adhesives to make repairs.
If you guess on the mix and get it wrong, it will either remain a sticky paste or
it will harden too quickly, become brittle and crack.
A fiberglass resin like Epon 828 or diethylentriamine (DTA) mixed wrong will
actually “cook off” and produce harmful fumes.
Get the mix of adhesives and resins right the first time by using a digital
scale, NSN 6670-01-325-3162.
Airframe repair TMs provide
the ratios you need, and the
digital scale makes sure you get
the right mix the first time.
Mix in Paper Cups
Need something to do the mixing in? NSN 7350-01-359-9524 gets you 1,000
8-oz paper mixing cups. You can write the time of mixture right on the side of
the cup, so you can track pot life.
You can also keep the cups with any extra mixture for 24 hours to see if it
cures. Sometimes the area repaired is so deep in a panel that you don’t know
for sure when it has cured.
Checking the paper cup with the mixing time, resin and curing agent used is an
easy way to check the repair’s progress.
Airframe Repair . . .
Digital scale
ensures correct
measurements
this
mixture should be
just right
because
i used a
digital
scale
.
i guess
we'll
weight
and
see
!
PS 559
35
JUN 99
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