PS Magazine - TB 43-PS-664
PS, The Preventative Maintenance Monthly
ISSUE 664
MARCH 2008
36
PS 664
MAR 08
37
PS 664
MAR 08
M
echanics, sand is unforgiving and relentless when it attacks aircraft components.
You can avoid premature wear
and tear of your Chinook swash-
plates and forward and aft uniball
surfaces by wiping off dirt and
excess grease. Inspect, clean and
repair them like it says in IETM 1-
1520-240-23&P.
Keeping the swashplates free
of excess grease and the uniball
surfaces clean as a whistle prevents
friction that can lock up the flight
controls.
Locked
controls
spell
curtains and could put your bird in
harm’s way with the ground.
So take it easy when you grease the swashplates. If excess grease gets on the
uniballs it acts like a magnet for dirt, grit and sand, which can scratch, nick, or pit.
This leads to uniball friction, binding and failure.
The bottom line: clean, smooth uniballs last longer than dirty ones. You’ll be
replacing them often if you don’t service the uniballs more often in the desert.
When working with the for-
mation lights on your Chinook, it
is not necessary to cut the wires to
remove them or to gain access to
other components. Formation light
wires have quick disconnects and
need no cutting.
So, the next time you’re working
with the formation lights, just
unsnap the wires like it says in
IETM 1-1520-240-23&P and don’t
cut them. The formation light
wire connectors may not look like
quick disconnects, but they are.
If you’re not sure what to do, then call your senior mechanic before doing anything.
Lights out in the barracks is OK, but lights out on your bird means NMC.
CH-47D…
Dirty Uniballs Won’t Last
CH-47D…
LIGHTS OUT
Keep uniballs clean when on bird
I’m all
buttoned
up, but did
you clean my
uniballs?
you’re
excess
grease free
and uniball
smooth!
and by the
way, don’t
forget to look
for
excess
grease
around my
swashplate
area.
new mechanics, getting
to know your chinook is
no small task.
don’t
get into the
habit of cutting
wires and asking
questions later.
Unsnap quick disconnects instead of cutting wires
get me a pair of
cutters for these
formation lights!
hey, those
are
quick
discon-
nects!
yep!
just
snap
‘em apart
to disconnect.
664.36-37.indd
1-2
2/7/08
10:00:37 AM
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