PS Magazine - TB 43-PS-420
PS, The Preventative Maintenance Monthly
ISSUE 420
NOVEMBER 1987
I i
:t
1j
1·
UH-1 .±²
Shimmy, ShImmy
Carefl, Huey mechs, when you have
to replace shims In your bird's tail rotor
hub and blade assembly.
When you PEl oF layers o± shIm stOk
to get a required thickness, you can get
a sh² with a raiseD edge.
Te s³m B´µn ¶e
t
R·r hub And
the sta¸c s·p
±
a g¹ exºmple» ¼'s ½tem
27
²
¾ig 145 o±
T
55-1520¿21À23ÁÂ1Ã
½t's not as wide as the poInts o± the
micrometer on iÄÃ ½± the shiM has raised
edges, Åatten Æem out beÇre ÈÉg Ähe
measuremenÄÃ
micrÊmeËr, so
³
you're not real carefl,
ÌÍen take your rÎdIng. Ìhis will give
ÏsÐ Ðges
c g
ve you a bum rÎdIngÃ
the eXact thicKess ѱ the shImÃ
36
NOV 87
Your
Mo
Cobra's UH¾/VH¾ antenna stIcks ouÄ lIke a sore thumb, mechs,
mÒing
´
mighÓ accident prone.
µ
you aren't eXtra carefl when attaching grÊund
wheels and towIng Ôhe bird, you could put the anteNna out o± commission.
Áara 1Õ21 o± ÌÖ 55Õ1520¿234¿23Õ1 says to Çrce Æe Äa×bØm doÙn as Æe
handling whÚel pumps
a
acÄuated In order to take some o± the load oF and make
pumping easier»
Ûut don't overdo it
l
some mechs
and slam Æe antenna into the ground. ½±
the Überglass cracÝs, moisture
c
get
iÞÄo Ähe antenna and sÍorÄ out the radio
wires insideÃ
So come down easy with ¶e ßilboom
when you're helàing wiÆ the towing
chores. You don't have to touch Æe
antenna to the ground in order to get the
wheels pum
p
up.
ánd use the same care when you're helping tow the bird. ávoId bumps and
depressions Æat âight bounce the antenna agaiÞst the ground.
NOV 87
37
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