PS Magazine - TB 43-PS-476
PS, The Preventative Maintenance Monthly
ISSUE 476
JULY 1992
m
981
north seekiNg gyRocOmpasses
(±SG) a²e beIng mI³TAkenlY Tu´ned µn
bec¶U·e cRewmen tH¸nK tHe .Ompasses
a¹e dRºf»Ng tOO m¼cH½ ¾s a ¿es Ult, ±SGÀ
aÁe In
sHÂÃt sUpplÄÅ
±SGs caN dRIFÆ Up tÂ
8
mIls peÇ HÂUR
aNd be
OK.
Make a nÂteÈÉ tHes e ÊËeps
UntÌl tHeyLre added TÂ Íe±SÎ cOnÏI-
denCe tes t Ân Page
2-326
In ÐM
9±2²50±
2³6´µ0:
¶4·
Look thrOugh the TanK pERiscoPe
±EpiECe. ²osItion the feTINg h³ad
w´th The haNd µomRo/s so that thE
CrOsshaIRs oF ¶he lD!· RET¸¹ºe aRe aga´N
CeNtEr»d oN the tARgEt¼ ½he aziMUth dIs-
pºayed oN tHe ½S¾D shou"d be ¿OÀghÁ
the saMe as it was iN STep
7¸
·e¹o the
az´MÀthÃ
ts¹
Äeave the taRGeTiNg }ead oN the
tarÅet ÆR oNe hoÀ¿Ç ÈaKe sU¿» thE¿» is
no MoVeMeNT oF the CÉosshaiR oN
Te
ta¿Ået andthÊË the aZ´MuTH NuMBeR doEs
NoT ChangE MoRe ThaN
º
MIJsÌ
±-
²³
J³
U_
L _
9
´
2.µ¶·l¸¹º»¼'½¾¿À
»¼½
ÍF the CÎosÏhaiRs Moved, soMeÐ
th´Ng May ÑÒ wrONg with thE tÀÓÓet
hydRaÔÕIµs. ÖF the CÓOsÏhaiRs stayed oN
×RgØt aNd the ChaNge iN aZiMUth Was
MoRe thÙN
º
Mi
l,
the ÚSÛ is dRiÜIngtoo
MUChÝ ·EpoRt eiTheR pRobºeM jo YoUR
MeChaNiCÞ
CroSShairS
dRIfing?
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