PS Magazine - TB 43-PS-472
PS, The Preventative Maintenance Monthly
ISSUE 472
MARCH 1992
ike a new-bor baby!
That's how you handle a New Inpu±
oR ou±put shaf oIL seal Fo² ±he eNgine
Nose geaRbox.
Those seaLs A²e ca²bon and they A³e
ve²y, Ve´y F´agILeµ Just a li±tle abuse
will c²acK oR chIp ¶em· ¸±¹s a cRyIº'
shame ±o taKe tHe ±ime »Nd e¼½o²t ±o
¼Ix ±ha± nose geA´boX Leak jUst ±o ±ur
a³ound and Do I¾ agaIN¿ Ào± ±o men±IoÁ
the cost¿
ÂnD Don¶± tAKe I± FO´ g´anÃeD that
Äus± becaUse a seaL is New, it¹s gooD·
Seals a´e easily damageD In shIpping
and h»NdlingÅ
Blac
Hw APU .±±
Turbine Wheel Inspect±oN
T
he BlacK
Æ
ÇawKÈs ÉPÊ eNgiºe ±U²Ë
biºe wheel ÌnÍpecÃiÎºÏ T»ÍK
2-21
iº
T
55²2835³20 ´23,
h»Ð
4
sÃepsÑ
SoMe eNgiNes FÒIÓ ±he clea´ANCe checK
iº SÔeps
3
AºD
4
beÕaÖse ×he Ø»ÙÓINg
eDges oF soMe ±U²biÚ wheel ÛlaDeÐ
we²e cu± oFF ±o Ü»l»ºEe ±he wheeÓÝ
WheN ×he
I
lades a²e cU± ÎFFÞ ±he meaß
su²eMeº± be×weeº blaDe ±ipÍ aºD ±he
Ãu²biºe NÎzzàe ºÎ longe² Mee±s ×háâ
Ë
qUI²eMeº±s ÎF SãepÍ
3
a 4.
MAR 92
(1)
Inspect turbine wheel for cRacks and
bRoken vanes. IF found,
APU
Requ±Res depot
Repa±R²
(2) ³nspect FoR maRks ±ndicating turb±ne
whEL has been rubb±ng on tuRbine nozle´
µotate tuRbine whee¶ and listen foR RUbbing
sound² ³f found·
Apu
RequiRes depot repa±R²
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