PS Magazine - TB 43-PS-710

PS, The Preventative Maintenance Monthly

ISSUE 710

JANUARY 2012
PS Magazine - TB 43-PS-710 - Page 12 of 33
20
PS 710
JAN 12
21
PS 710
JAN 12
S
pinning in the wind is one of the worst
things that can happen to a vehicle’s
turbocharger when the engine is
not
running!
How come, you ask?
While transported on the back of a
semitrailer, the exhaust pipe on this type
of equipment can face directly into the
wind. That means air is being forced down
the exhaust stack and into the turbocharger
during transport.
All
that
forced
air
causes
the
turbocharger impeller to spin with no
lubrication. With the engine turned off,
no oil is being pumped into the impeller’s
bearings. They burn out. The end result
is a vehicle that is stuck at support or a
DOL shop with a ruined turbocharger–big
bucks and lots of downtime!
So how do you prevent turbocharger
burnout?
There are two ways:
•±
Use duct tape, NSN 5640-00-103-2254,
to tape over the exhaust stack. That
way air doesn’t get forced down the
stack and into the turbocharger.
•±
Or have your mechanic loosen the
clamp that holds the exhaust stack in
place. Turn the stack so the opening
faces towards the back of the trailer.
Re-tighten the clamp.
T
he Black Hawk nose cover is bulky and cumbersome. Putting it on can be a hassle.
It can also be dangerous if you’re not careful.
Pay attention to the pitot static tubes when covering the nose and windshield as
you try to hook the main rotor pylon track opening.
When standing on the aircraft to secure the cover, some mechanics forget how
close their face is to the opening of the pitot static tubes on both sides of the aircraft.
A sudden turn into the
tube as you stretch to hook
the cover could gouge out
an eye, cause damage to
your ear or severely cut
your face. The opening of
the tube is sharp and will
cut you.
Watch where you are as
you pull the cover over the
windshield and make sure
your face does not bump
into the tube opening.
Random
Burnout
CCE/MHE…
Random
Burnout
UH-60 Series…
Look Before You Hook!
When hooking
cover,
watch±out±
for±pitot±tube
hey!
watch
out for
my
pitot
tubes!
yeah,
I remember
what happened
last time!
my face happened,
and boy did it
hurt!
I’ll be looking
out for the pitot
tubes
this
time!
ahhh…
this
is
the life!
a beautiful
day and the
wind in my
face!
it may
feel
good
to you
now…
…but your
turbo-
charger’s
gonna hate
you
later!
710 20-21.indd
1-2
11/23/11
2:44 PM
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