PS Magazine - TB 43-PS-597

PS, The Preventative Maintenance Monthly

ISSUE 597

AUGUST 2002
PS Magazine - TB 43-PS-597 - Page 22 of 32
AH-64D…
P
ilots and gunners, your Apache’s
helmet display unit (HDU) cover is not
a step up for a quick exit.
So watch your big feet when you exit
the bird and steer clear of the cover.
Don’t
step on it!
The thin cover protects the HDU but
will crack under your weight. If you
step on the cover and crack it, you
could damage or break the HDU
device, too. Then the HDU is NMC.
Once you break the HDU, you won’t
be able to view the video display read-
ings in the eyepiece to fire the 30mm
gun or other weapons or be able to fly
during limited visibility conditions.
So pay attention and slow down
when the mission is over. The HDU
cover can’t handle your big feet.
PS 597
AUG 02
40
PS 597
AUG 02
41
Tube Plug (HYD)
(Flareless)
NSN 4730-
00-540-2231
00-595-3917
00-541-7198
00-541-1465
00-202-9169
00-203-3709
00-555-7804
00-202-8341
00-202-8860
00-966-5695
00-203-0247
00-289-8627
00-203-0246
00-203-6938
00-289-8626
Size
(Outside diameter)
inches
1
∕
8
3
∕
16
1
∕
4
5
∕
16
5
∕
16
3
∕
8
3
∕
8
1
∕
2
1
∕
2
5
∕
8
5
∕
8
3
∕
4
3
∕
4
1
1
Cap Tube
(Flared)
NSN 4730-
00-497-4244
00-221-2126
00-278-5006
01-061-4150
00-585-8769
00-221-2127
00-221-2128
00-221-2129
Size
(Outside diameter)
inches
1
∕
8
3
∕
16
1
∕
4
5
∕
16
3
∕
8
5
∕
8
3
∕
4
1
Tube Cap (HYD)
(Flareless)
NSN 4730-
00-837-9842
00-115-0210
00-958-3704
00-640-0632
00-985-5165
00-618-3572
00-990-2585
00-451-2762
00-618-4227
00-412-8260
00-202-8792
00-221-2128
00-400-2223
00-085-1936
00-274-7120
Size
(Outside diameter)
inches
1
∕
8
3
∕
16
1
∕
4
1
∕
4
5
∕
16
3
∕
8
3
∕
8
1
∕
2
5
∕
8
5
∕
8
3
∕
4
3
∕
4
3
∕
4
1
1
Man, I’m
glad
this
mission is
over!
me too, but
keep your
big
feet
off my
hdu cover
when you
get out!
big feet
off
cover
When not in use,
keep HDU covered
Keep feet
off cover
here’s more
info for you
on caps and
plugs!
Additional cap and plug
info can be found in your
general aircraft TMs.
Check out Paras 4-5 and
4-5L of TM 1-1500-204-23-2,
and your consumables list
in TM 1-1500-204-23-6 for
more info.
‘Course, always use caps
and plugs called for in
your maintenance TMs.
597. 40-41 (C)
6/21/02
3:12 PM
Page 1
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