PS Magazine - TB 43-PS-701
PS, The Preventative Maintenance Monthly
ISSUE 701
APRIL 2011
36
PS 701
APR 11
M
echanics, the A-model Black Hawk doesn’t have a gutter. So water from rain and
washing that gets into the nose compartment through a worn nose door can’t get back
out. That means damage to avionic components.
Always make sure you have a good seal in place. If you don’t, the attitude &
heading reference unit (AHRU), NSN 6605-01-503-5284, and other avionic
components are vulnerable to water damage. The AHRU controls the cockpit attitude
indicator gauge. If standing water seeps into the AHRU, the gauge is kaput. If that
happens, you won’t get a correct heading for your bird.
C
rew Chiefs, rushing through Black Hawk pre-flight inspections causes problems in
the long run.
Take your time and follow the TM pre-flight procedures step-by-step.
For example, if you get a fault during stabilator checks in auto mode, don’t rush
through the task. You must follow the troubleshooting procedures to check the
stabilator amplifier in the tail cone. Sometimes the gyros in the stabilator burn up and
troubleshooting helps locate the problem.
In a rush, some just remove the component and hand it over to the aviation
support company (ASC) to fix the problem. Before turning any component in to ASC,
troubleshoot it thoroughly. If you can’t find the problem, then give it to ASC.
If your troubleshooting fixes the problem, make sure you do the follow-on
maintenance like it says in TM 11-1520-237-23 to avoid similar problems later.
If you’re working on an A-model Black
Hawk, eyeball the seal around the nose
door to make sure it’s secure and not worn,
cracked, cut or deteriorated. Inspect the seal
as part of the nose door inspection daily
like it says in TM 1-1520-237-PMD, then
thoroughly
inspect it every 40 hours like
it says in TM 1-1520-237-PMS. Replace a
bad seal with NSN 5330-01-114-2342.
If you see standing water after rain
showers or washing the bird, wipe it up
quickly.
So make sure your UH-60A has a good
rubber seal around the nose door and keep
the compartment dry.
UH-60A…
Water KOs Avionics
UH-60 Series…
Maintenance is
NOT
a Dash to the Finish
Some UH-60s have
gutters to direct water
away from the nose…
Make sure door seal is in good condition
…but the
UH-60A
does not!
I think
we’re done
here.
this
is what
happens when you
don’t seal the
nose compartment
properly!
boO-yah!
yeah, let’s
head back to
the hanger.
wait one
minute!
did you
really
do
everything?
701.36-37.indd
1-2
2/21/11
3:50 PM
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