PS Magazine - TB 43-PS-720
PS, The Preventative Maintenance Monthly
ISSUE 720
NOVEMBER 2012
39
PS 720
NOV 12
Stay on Solid
Ground
Dear Editor,
The Sentinel radar system can generate more than 20,000 volts, which
makes it critical that crews pay attention to proper grounding. You don’t
want that much electricity running loose!
The Sentinel’s grounding rod should
be buried at least 9 feet deep. But if
you’re operating in the desert’s dry air
or on cold ground, it will be harder to
get a good ground with one grounding
rod. In those cases, it’s better to use
a star pattern with 5 shorter ground
rods spaced 2-4 rod lengths apart and
connected together. Since the Sentinel
ground rod kit, NSN 5975-00-878-
3791, has only three 3-ft rods, you
may want to order an extra kit if you
operate much in dry or cold conditions.
All that work placing
the grounding rods will be
for nothing if the contact
surfaces for the grounding
wires are corroded, painted
or dirty. If the contact
surfaces aren’t clean, current
has trouble traveling through
the grounding wire. Check
these areas at least monthly
and clean them if necessary.
AH-64/D…
Sentinel Radar
System…
mechanics, would you
toss your credit card any-
where after you use it?
I won’t NeEd
this
for AWhile.
that would
lead to
financial
nightmares!
well, the same goes for the analyzer
card kit, nsn 5998-01-452-3559.
after the 25-hour/14
day pms, don’t toss
the card anywhere,
especially
not
into a
tool or maintenance
drawer that’s full of
heavy tools.
of
course
not!
In cold or dry ground, it’s better to
use a star pattern for grounding
Check all contact surfaces
for corrosion, paint, or dirt
Clean if
necessary
if you only
made sure I
had
proper
grounding…
…all this
electricity
wouldn’t
be
running
loose!
if you do, that could
damage
the card and
then you won’t be
able to download
maintenance information
for the data recorder
used in the Longbow
integrated maintenance
support system,
ground analysis
software (LIMsS-GAS).
Always store the card in a safe place
where it will be
prOtected
from damage.
And remember, without it, you’ll never know
the maintenance history of your aircraft.
Stay on Solid
Ground
Protect the Analyzer Card
720 38-39.indd
1-2
9/24/12
3:57 PM
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