PS Magazine - DECEMBER 1972
PS, The Preventative Maintenance Monthly
1972 SERIES, ISSUE 241
DECEMBER 1972
Aircraft TIRes .±
TLC TO THE ReSCUe
The tires on a fixed wing bird take a
beaRing, coming to grips with vArious
oBstaCles in aLL types of weather. With
just a little tender Lovin' care, tho, they'Ll
rea±ly ²ake care of you.
EyeBalL the tires during your Preventive
Maintenance Daily³ ´uts that expose
thµ cord and bListers over 2-in diameter
in the sidewaLl means the tire has ¶o be
Changed.
in the tire tread by using a medium·sized
screwdriver. ´over the object you're pry¸
ing with your hand so it doesn't fLy up
and hit you in the noggin!!
Wipe oiL or grease from a tire with A
Cloth moistened with drycleaning soLvent.
¹rotect Bearings and seaLs and wAsh the
tire with mild soap and water to remove
the solventº
Only support Can repair the tire, send it
InspeCt the tire to be sure ¹O» hasn't
for retreading if it passes inspection, or
caused the rubber to become swoLlen,
sc¼ap the tire.
soft or spongY, so thAt you have to re½
¾emove s¶ones, nails and other objects
plaCe it.
34
²³´E P´µSSU´E OK?
OverinfLa¶ion can cause a tire to ex¿
pLode³
Underinflation Can cause a tire to sLip
on the rim, shearing the inner tuBe valve
stemÀcause a tire to Álow out on Landing.
ÂhiCh is why you want to check the
Bird organizational maintenance pub for
Correct air pressure figures.
1.
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Ãf your unit has a protective tire Cage,
use it when you make with the ai¼ hose.
Ät the very ±east, use safety ChuCk gage,
FSN 4920Å781Å8423, at pressures of 50
¹SI and aBove. With the gage you Can
Æef±ate, inflate aÇd CheCk tire pressure
f¼om a comfortaBLe distance in Case the
tire shouLÈ go ÉOOM!
Äs you go over the tire Looking for
Æamage, eyeBalL ²he wheeL also. Nicks,
C¼aCks and Corrosion of the metal may
require repair or replaCement of the
wheeL³
FÊus in on the tire sLippage ma¼k,
for reËL. Para 3Å214e of TM 55ÅÌ500Å204Å
25/Í (Äpr 70) on gene¼al main²enance
Ca±ls for a sLippage mark on ²ires with
tuBes. The mark is put on during tire
mounting to give meChanics a visual
means of spotting tire slippageÎ TuBeÏ
±ess tires don't get marked.
SLippAge marks wiLl wea¼ off in time.
¾enew the mark with a painteÆ red stripe
Y
inCh wide By 2 inches Long ac¼oss the
rim ÐLange and tire sidewa±±, extending 1
iÇCh on the ¼im and Ì inCh on the tire³
Deciding when a ²ire has eXcessive
wear and needs changing is up to yoÑr
maintenanCe officer. Ãf the tires on your
Bird are not ±isted in TÉ Ò5Å2620Å202ÓÌ5
(Äug 7Ì) as authoriZed for ¼et¼eading,
you Can use 'em untiL you spot the cord
Body.
Ti¼es authorized for ret¼eading have
to Be remoÔved when any portion of the
t¼ead wear has reached the bottom of
the tread groove³
Âait oÇe, stiff-and f±ap-wing ti¼eÅChaÇgers. Neve¼ replaCe an airplane tire with
a heLiCopter tire. Õhose choppeÖ tires are marked HE»Ã´O¹TE¾ or HE»× 'cause
they're not mØde to stand up under the high speeÆ and impact ±oads of airp±aÇe
landings and takeoffs. Ãf neCessary, you can use an airplane tire on a he±icopter.
J
usÙ make sure it's the ¼ight size!
±5
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