PS Magazine - AUGUST 1973
PS, The Preventative Maintenance Monthly
1973 SERIES, ISSUE 249
AUGUST 1973
LUBE HERE
There's an area on tHe power tur-
biNe governor RPM co±trols tHat
needs· your atteNtioN during tHe
Periodic cHeck. It's tHe droop cam
and slider²
Clean tHe slider but don³t lUbe it.
THat'll keep tHe slider moving²
NO SAFETY
Saftying Hose connect´ons on your
bird is SOP, witH tHe exception oF
quick disconnectsµplUs
l
otHer.
Leave tHe safty wire o¶ at tHe ¸el
¹lterº outlet quick disconnect coup-
ling² »ere's wHy.
Suppose you Have an emergency
sucH as a Hot start. You want to stop
tHe ¼ow oF JP½4 to tHe engiNe witHin
3¾5 seconds in order to save tHe
engine ¿om damage. You can't stop
tHe ¼ow Àst enougH iN tHe cockpit.
You can stop tHe ¼ow ¿om tHe
¸el outlet port to tHe engine by using
tHe quick disconnect at tHe ¹lterÁiF
tHere's no saFety wire to cut.
WHenever you mount your »ueyÂ
by tHe way, Never use tHe Ãlter as
a Hand Hold² It's mounted to a HoNeyÄ
ÅÆmb panel tHat will sepaÇate ¿om
stress and strain² Repairing damaGed
Èaneling is a supÈÆrt ÅHÆre wHiÅH
Åan tie up yÆur Bird²
6
CAN'T
STOP
FLOW
FAST
EnOUGH
IN
COCKpiT
Judging wHetHer tHe syncHronizeD elevator on your bird Has too mucH
play during an inspection is migHty iÉportant. WitHout proper sHimming
elevator vibrations may wear ouÊ tHe control rod bearings² You'll ¹Nd
yourselF replaciNg parts instead oF sHims.
ËHen you plant your mitts on tHe
elevator you really can't tell by fel
iF tÌe sHimming is Oj. Judgments
di¶er ¿om one mecH to anotHerÍ So,
Îse a dial indicator.
»old tHe dial indiÏ Ðator on tHe tail
boom, pÑaciNg tHe stylÎs against tHe
inboard edge oF tHe elevator at tHe
pivot pointÍ
Òse only moderate Hand pressure
wHen moving tHe elevator so you
don't de¼ect it and get a False reading²
To cHeck tHe axial play, move tHe
elevator inBoard and outboard
span½wise²
You're allowed a
minimum oF 0² 005Óin and a maX-
imum oF 0² 030½in play² IF you don't
Have it adÔust tHe sÕims Between tHE
tail Boom skin and tHe support
retainersÖ
×o ÅHeck tHe radial play, HÆld tHØ
dial indiÙator on tHe tail BoÆm ÚitH
YOU CAN±T Te²² BY FEEL .
.³
... SO USE
DiA²
inDICATOR
tHe stylus iN contact witH tHe upper
surFace oF tHe elevator, near tHe
inboard edge oF tHe pivot point.
Ûo musclÜ, Èlease² »eavy Ýrce in
moviNg tHe elevator will ¼ex tHe spar
tube and give you a bogus reading²
LigHtly move tHe elevator up and
dowN² THe maXimum readiNg on tHe
dial indicator is 0² 010 incH² IF you' re
Æut ÆF limits adÔust tHe sHims and
recÞeck tße radial àlay Between tHe
Horn and suÈport retainers²
´1
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