PS Magazine - TB 43-PS-456
PS, The Preventative Maintenance Monthly
ISSUE 456
NOVEMBER 1990
AH-1 Cobra .±²
No Disassembly RequIrEd
Y
our TMs tell you to check your
Cobra'S main driveshaf Fr residUal
magnetism a±ter a lightning strike.
I± you ²nd magnetism, yoUr TMs
inspection checksheet says to disas-
semble the drivesha±t Fr a more de³
tailed inspection o± the shoRt sha±t.
But you don't need to disassemble
the drivesha±t to inspect it i± your bird
UH³60A Black Hawk ´²²
has K ´lex sha±t, PN µC¶P 2381³1·
However, i± yo¸r Cobra is one o± th¹
ºw that still has the older model main
DriVesha±t, PN µCKP 2281»10¼ or P½
205¾040³004³2¿À Áisassemble tÂe sha±t
and inspect it liÃe Ät says in Para 6³19· 5
o± TM Å5Æ1520³236³23»1 or PaRa 6»
7d.2 o± TM 55³1520³234³23³¿.
SAvE BAtTE±y PowEr
S
ome crews Frget to tuÇ oÈ their cockpit utilÄty lights a±ter a missÄon. OtÂers
Frget to swiÉch the battery oÈ.
The result is a discÂArged battery that won't start the ÊPË 's electronÄc sequence
uÌit (EµË) nÍXt time·
µo ı it's not already pArt o± your unÄt's µOP, make it a haÎit to disconnect
your Îird's battery at the end o± each day by tUÏing the battery connector to
the
Ð
le±t until Ät detaches.
You'll save battery power and a lot o± ÂeadÑcÂes·
3µ
NOV9¶
AH·64A Apache ´´¸
@r!±f ²³
a
oo
:
ay
braÒ
Ó
on yoUr Êpache's
HÔÕÖÊ 70 Lightweight rocket laUnch×
ers caUse the laUnchers to move dUring
±iring· That means erratiØ rocket trajec-
tories and missed targetsÙ µo torqUe the
sway Îraces to 100 lb³iÚ to keep the
LaUnchers Ûom ÜoviÚg during ±iringÝ
Fi²³ng CUr±ent che´k
W
hen you do a ²ring current check
on your Êpache's rocket launchers like
it says in Para 3³9Î(Þ)(a) o± TM 9³
1055»460³13&P, yoU have to tuÏ on
all power necesSary to ²re the rockets·
The switches are listed in Paras 2³1³2
and 2³2³2 o± TM 9³¿090»208ß23³2.
You also have to have a Heading àlá
titUde Öeârence µystem (HÊÖµ) line
replaceable unit (ãÖË) present or you
wonät get a pulse on yoUr multimeter.
NOV 9¶
37
There's åo mention o± the HàÖµ in
the ²riåg instrUctions on Page 2³7 o±
TM 9³1090»208»23³2, so maæe a note
until the TM's Updated·
1±
I
I
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