PS Magazine - TB 43-PS-673
PS, The Preventative Maintenance Monthly
ISSUE 673
DECEMBER 2008
43
DEC 08
A
cup flled to the brim with good coFFee may be a good start to a perFect day. But flling
the Forward and aFt rotor head oil reservoirs to the brim on a Chinook can ruin the rest oF
your day, mechanics.
IF the oil reservoirs are low, fll ‘em halFway like it says in
IETM 1-1520-240-23&P.
The cable is simply not long enough to cover the added distance needed when
folding up the universal weapon’s pylon. When folding the pylon, the cable can bend
or snap off the bracket welded to the gun pod.
To make matters worse,
the umbilical cable is
usually wrapped around
the pylon mounting arm
to keep it out of harm’s
way. But that just makes
the cable even shorter!
When aircraFt broil under the hot sun on the flight line or in the desert, the oil heats up
and expands. ±ull rotor head oil reservoirs leave no place For oil to expand.
So it blows out the rotor head oil seals. This creates an unsaFe condition when flying with
leaky rotor head oil seals and it also gets all over the top oF your aircraFt making the bird
dangerously slippery For anyone topside. You also have a mess to clean up.
BeFore you service the rotor hub oil tank, the horizontal hinge pin oil tank or the vertical
hinge pin oil tank, rotate the blades like the IETM says. Doing this levels oFF the oil in the
sight indicators so you get the correct reading beFore adding oil.
CH-47D…
Don
’
t
Fill
To The
Brim
OH-58D…
Disconnect
BEFORE
You Fold
Do not overfll
let me
top you
off, hon!
hey
lady,
I don’t
think so!
half full
is enough
for
my
oil
reservoirs!
crew chiefs and
mechanics, save
yourself the
trouble of gun
pod repair.
disconnect your
kiowa warrior’s
.50-cal gun umbilical
cable
before
folding the gun!
the simple
solution is
to disconnect
the umbilical
cable first,
then fold
the gun.
ok, we’re done
for the day,
let’s fold this
operation up.
remember,
disconnect
before
you
fold my gun.
673.42-43.indd
1-2
11/7/08
6:16:38 PM
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