PS Magazine - TB 43-PS-609
PS, The Preventative Maintenance Monthly
ISSUE 609
AUGUST 2003
m
echanics, your new Kiowa Warrior engine barrier filters will prevent FOD from
entering the engine if they’re kept clean.
As long as air flows unrestricted through the new EBF filtration system, the fil-
ters will prevent compressor erosion and subsequent engine failure and replacement.
That’s what will happen if unfiltered air and all that it brings with it is sucked into
the engine.
Cleaning Tips Not in TM
MWO 1-1520-248-50-15, installed the new filters. Here are some lessons learned
to keep the filters clean as a whistle.
The maximum service life of the filters
is determined by the environmental con-
ditions you’re flying in. So take one or
more of the spare set of filters with you to
the field for each aircraft.
Sandy and
dusty flying conditions clog the filters
much quicker and require more cleaning
and changing of the filters.
To get more hours out of the filters
before cleaning or changing, “shake out,
not hammer out,” the heavy accumulation
of dust and dirt. Use extreme care,
though, and don’t shake them too hard or
you’ll damage the filter and its frame.
Plans for a unit-made device to shake out the filters is available along with EBF
maintenance procedures. The info is contained in a new manufacturer’s commercial
manual. For a copy, contact Ray Hensley (256) 955-7441 or email
Raymond.Hensley@redstone.army.mil
Inspect primary and bleed air filters.
If dirty, change out filters
Cleaning dirty filters in the field can be a difficult process. So always have the
spares on hand when you need to change out a filter. Clean the dirty filters when you
have the time and facilities to do it properly.
Dirty filters require lots of low pressure water to completely flush out contami-
nants.
Too little water won’t clean the filters properly.
While washing the filters, do not allow contaminated water with filter oil and
cleaning solvent to run onto the ground. To dispose of contaminated water, check
with your local environmental folks for guidance.
Along with the water, use only the approved cleaning solvent and the filter oil
supplied with the MWO kit.
If you need more, NSN 6850-01-486-7201 brings the
cleaning solvent and NSN 4330-01-486-7174 brings the filter oil.
After washing,
allow the filters to thoroughly dry before you re-oil them and place them back on
the aircraft.
If you need a new engine filter assembly, order NSN 2945-01-488-6576.
NSN
2945-01-488-6577 brings the bleed air filter assembly.
PS 609
AUG 03
40
OH-58D…
Keep EBF filtration system clean
Primary filter elements
Bleed air plenum
Bleed air filter
Bleed air
duct
Bypass
door
Intake plenum floor
with all
this flyin’
around, how
‘bout changin’
my clogged
engine
barrier
filters.
coming
right up! We
got some
extras in
the hanger.
I’ll clean out
the rest of the ebf
filtration system
before we install the
replacement filters.
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