PS Magazine - TB 43-PS-682
PS, The Preventative Maintenance Monthly
ISSUE 682
SEPTEMBER 2009
36
PS 682
SEP 09
Not
M
echanics, if you hear noisy valves that won’t actuate or experience severe leak test
failures while operating your pitot-static test set, NSN 4920-01-388-6790, shut it down
immediately!
The culprit is probably sand contamination. Turning off the set prevents damage to
valves. You should turn it in for maintenance.
The test set has many electrically-operated valves that can become jammed or damaged
from even the smallest amount of sand.
Though the test set has compacted wire Flters inside the Ps and Pt connectors, they are
no match for Fne sand.
To prevent sand intrusion, make sure your aircraft’s pitot static ports are clear of sand
and water before connecting the set to the bird.
Keep all the hoses and adapter ends out of sandy and dusty areas while the unit is
operating. If you don’t, the static side of the test set will draw in contaminates because it
operates like a vacuum.
Don’t use compressed air to blow out dirt when hoses and accessories are hooked to
the set. Never blow out the Ps and Pt connectors either. That will damage transducers and
force contaminants further into the test set.
Before connecting them to the test make sure you blow out the hoses and accessories
with compressed air to remove dirt buildup.
Remember,
never
operate the test set in a sandstorm unless it is mission essential.
One Size
Does
Not
Fit All!
Ground Support…
Protect Test Set From Sand
ALSE…
pilots and copilots, having your
noggin measured for the right-sized
ah-64 integrated helmet and display
sight system (Ihadss) is important.
the helmet comes in
three
sizes.
Make sure you get fitted by a
school-trained alse technician to
determine the correct size helmet
and
only
use the helmet size you are
fitted for before taking flight.
a helmet that’s
too big
or
too small
puts your
noggin in
harm’s way.
the
medium
helmet is
nsn 12
7
0-01-295-6255.
the
large
helmet is
12
7
0-01-298-3544. the
extra large
helmet
is 12
7
0-01-263-2545.
One Size
Does
Fit All!
are you
sure
you’re ready
to fly?
that
helmet
doesn’t
fit!
Protect
from sand
to keep test
set working
can’t you
see I’m
choking
here!?!
cover me
or I cAn’t
work for
you!
682.36-37.indd
1-2
8/3/09
3:03:25 PM
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