PS Magazine - TB 43-PS-437
PS, The Preventative Maintenance Monthly
ISSUE 437
APRIL 1989
T53 Engines
••±
-.±
Dear Editor,
UH-1 and AH-1 mainTenance manuals are shoR info
on moniToring The accuracy of the N± gas producer
Tachometer on ²53 engines.
We've come up wiTh ³ liTTle adapTer cable ThaT, when
•
used wiTh the B´112Jµ JeTcal analyz¶r, will leT you
p·eVenT engine overspeeding.
Here a·e The paRs you need:
I
t±
M
NS²/PN
I
t±
M
NSN³PN
Conn´cµor
(
P1
)
593¶0·228-395
2¸u¹s
5310º»¼857¼5558
Conn´cµor
(
P2
)
593¶0½257¾679
8 machIn´ screws
5305¿OÀÁ2998
Conn´cµor
(
P3
)
593¶0· 72Â638
8 fla¹ wash´rs
53Ã0Ä0¼Ã87¼2397
termInal BoArd
5ÅÆ·950¼16Ã0
8nu¹s
531ÇÈ07É147Ã
#Ã6WLr´
6145½0Ê05Ë84
8 µ´Rminal ÌUgs
5940ÄÊ204¼8966
Box 2Íx2Îx1Ï
PNCÐ21(B,
2nu¹s
53Ã0ÄÑ07É1465
CÒG±712Ã8
2 fla¹ wAsh´rs
53Ã0¼00½167Ä83Ã
2 machin´ scr´ws
5305½0D889½2997
1grommeµ
532Ó276¼6228
2 fla¹ wAsh´rs
531Ô55Ê5009
He·e's how you use iT¸
ConnecT P1 To The ¹PM inpuT iºsTrumenT cabl» connecTor on The
JeTcal analyzer.
Connect P2 To you· bird's TachomeTer gene·aTo· wire ha¼ess.
Connect P3 to you· bi·d's TachomeTer generaTor.
Follow The procedu·e in P³·a 2-7 o½ ¾M 55-4920-401¿ 13&P.
Carroll W.G. Neal
Chris Krame·
F.
O·d, CA
ÕpH¼4Ò FÌIgÖµ ×eÌmeµ
².³
_-±²³, ´µ ¶
he headset-microphone wiring har±
ness on your
SPH·4A
flIght helmet suF²
³rs more stRess than aN air Tra´ic conµ
Troller at a major airport.
¶hat's because It dangles ·om your
helmeT like a pupPeT on a strIng¸ ¹t gets
bumped, bruisedº battered and benT.
¶heN It has to be replaced»
¼elieve soMe o½ The sTress aND give
the wirIng ha¾ess soMe protecTion by
taking up the slack with a cushioned
loop claMpº
NSN 5340·00¸533·3514¹
Open The clamp enough to iNsert the wiRing hAess, Then attach the claMp to
your helmet with one oF the screws already attached to your helMeT.
Be sure not to bend The cables too much or The wires InsIde will break.
apR 89
º»
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