PS Magazine - FEBRUARY 1972
PS, The Preventative Maintenance Monthly
1972 SERIES, ISSUE 231
FEBRUARY 1972
TURBINE ENGINE HOT STARTS .±
iT
ti
1s.
Too much pride can cost you your hide,
hot pilots.
Like-wHen hOt starts are NOt written
up ±.
. and the engine folds up!!
Focus in On the T²53 in a ³uey (U³´
IC/M),
for exampµe.
The operatOR's p¶b says that during
starting thA· maximum aµµowabµe exhaust
gas temperature is 760¸DegreeS
¹
C.
If the
EGT gºs Over »60 for any peri¼d Of time
or over 650
• ½
¾L¿11 engine) or 675
·
(ÀÁÂ3
engineÃ
Ä
fOr ÅÆÇOre than 5 secOnds, recÈrd
it On the
DA
FOrm 2408ÁÂ3. Give the temp
EYE
GaGE
dURiNG
STaRT
FaCÉ is, cHOPper Drivers, Write ¶p aµµ
teMps Over tHe yeµµOw µine tO assist creW
chiefs in tHeir troubµeshoOting cHores.
thru 1Â5
Ê
give acceptabµe crack µiËits On
the nozzµe asseÌbµy, coÌbustion chaÌÍ
ber and turbine wheeµ. Îarts that pass
inspectiOn stay put.
The crack µiÌits appµy thrOugHOut tHe
normaµ operating µife Of the engine ¶ntiµ
overhauµ.
There is nOthing "nOrMaµÏ abOÐt a HOt
startÑ YOu dOnÒt have a grad¶aµ heating
and expansion of metaµ.
InsteaD, rapid heating distOrts Ìetal.
Óracks open up and expand beyOnD µiMits
wHicÔ, Of course, can µeaD to engine faiµÕ
³ereÒs why. Öot aµµ parts damaged by
ure during fµight× Øhich can give yO¶ a
heat in the combustor turbine assembµy
hairy situation; tO say the least.
12
weak battery, fauµty fueµ cOntrOµ, staÙÉing
f¶el sOµenOiD vaµve tHat fÚiµs tO sHut Off,
Dirty air inµet, Or even by strOng WinDs
bµoWing ¶p the taiµ pipe.
Just take the cOrrective actiOn given in
tHe trOubµesHOoting tabµe, page 5Û24, Of
tHe
OrÜnizatiOnaµ
Maintenance
p¶b,
birdMecHs.
UICTIONOFTROuB±
6.1²³l:
o/´µ¶PWL•¸¹-
º»i"¼<½cd¾
n¿OBAbÀCuSE
"±²'.³´µP•¶·¸
Stfudol¹º»1¼<
IM\O½U¾¿FÀÁ
ÂwLÃÄÅdcÆÇÈiÉ
ÁOJReIYEAÂÃ
µisteD
Øhen tHe writeÁup sHows that the temp
Went over »60Ádegrees Ý any tiMe and
Over 650 Or 6»5 On tHe Ýharµie Or Þike
moDeµs fOr mOre than 5 seconDs, tHO, tHe
ÔOt end Has to
b
inspecteD by ßuppOrÉ
'ÝO¶rse, ÔOt staÙts can be ca¶sed by a
fOr internaµ damage.
,
·
±3
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