Fuel sistem JS31 jetstream

7/25/2019 Fuel sistem JS31 jetstream

1/75

Aircraft Fuel SystemAircraft Fuel System

PanAm International Flight Academy, Inc. 2001


2/75

Overview

Wet Wing

Front spar to rear spar, no ladders

!an" 1 #le$t wing, !an" 2 # right wing


3/75

Overview

%ach tan" divided into & cells and a vent tan"

'ell 1 at $(selage, cell & at wingtip

)ent tan" o(toard


4/75

Overview

Wing *+ dihedral $or gravity $eed

Fill at o(toard, oost p(mp at

inoard


5/75

Overview

!an"s are divided y ris to preventsloshing

is contain $lap valves to "eep $(el

$rom $lowing to wingtips when an"ing


6/75

One way -$lapper valves allow $(el to $low thro(gh ris


7/75

Heres another


8/75

Overwing $(eling

Filler caps


9/75


10/75

/e$ore tart 'hec"list -clear, loc", sec(re

-sec(re is to ens(re the $(el $iller cap is correctly closed.


11/75

)ent !an"

O(toard in each wing

)ent o$ $(el $(mes on gro(nd

Provides ram air press(re to $(el in $light


12/75

)ent !an"

iphon pipe r(ns $rom top o$ $(el tan" to ottom o$ vent tan"high eno(gh so that over$(el will r(n o(t $iller cap e$ore into siphon

hot, s(mmer day, $(el may epand into siphon pipe with $iller cap closed


13/75

)ent !an"

)ent pipeline r(ns $rom top o$ vent tan" to (nderwing 3A'Avent

)ents $(el $(mes

(ses ram air to provide press(re into $(el tan" in $light


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)ent !an"

)ent tan" has one o$ three water drains in wing

other two are (nder cell 1 and cell 2 at ase o$ wing


16/75

3ot a great pict(re, (t pointing

to a water drain pl(g at wing

root area

4(st a$t o$ the wheel well


17/75

5ihedral allows $(el to $low $rom tip to cell 1

%lectric oost p(mp in cell 1

/oost p(mp p(ts o(t 1& psi

'ontrolled y coc"pit switch on overhead panel


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F(el /oost P(mps

One $or each wing

O3 6 OFF


19/75

F(el /oost P(mps

tart

!a"e o$$ 7landing 89

Flight over 20,000

:ow $(el ;(antity


20/75

'hec" valve and press(re relie$

Prevents ac"$low o$ $(el

elieves ecess press(re in line

What happens i$ it $ails88


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:P 'oc" 7low press(re sh(to$$ valve9

3ormally open

'losed one o$ two ways


22/75

Feather :ever


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:P 'oc" Indication

White OP%3

ed =


24/75

imilar inimilar in

'onstr(ction as'onstr(ction as

the 'ross$eedthe 'ross$eed

'oc"'oc"


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%ngine F(el 'ontrol

First tage P(mp # increases psi y >0 psi

econd tage P(mp # increases y 1000 psi


26/75

F(el h(t#O$$ )alve

In the engine

3ormal way to sh(t down engine in

everyday operation


27/75

F(el h(t O$$ )alve

':O%5 two ways


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F(el h(t O$$ )alve ':O%5

Feather :ever

?echanically


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!OP (ttons

5' %ssential

F(el h(t O$$ )alve ':O%5


30/75

FO) # OP%3

%ngine t(rns at 10@ P?

A(tomatically y the A(to

tart 'omp(ter or

man(ally y the ?an(altart witches


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From FO), $(el goes to engine to e atomiied.

7more detail later9


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'ross$eed :ine

'ross$eed )alve

:ine connects $(el $eed lines

5ownstream o$ chec" valve, so no tan" to

tan" trans$er, only tan" to engine

Allows $(el

to trans$er


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'ross$eed )alve 'ontrol

etween the oost p(mps

OP%3

=


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'ross$eed )alve Indication

ottom o$ engine instr(ment

panel

3O?A: 7white9

'OF%%5 7green9


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36/75

'ross$eed WI!'= is laeled OP%3 =

'ross$eed I35I'A!O is laeled B#F%%5 3O?A:

!here$ore

'ross$eed is normally =

When cross$eeding, valve is OP%3, so OP%3 C B#F%%5


37/75

5rain and 5e#F(eling )alves

:owest point in tan"s3ot availale to pilots


38/75

!hree ways to meas(re F(el D(antity

'apacitance indicators

Fire Optic low level warning

?agnetic Indicators


39/75

'apacitance Indicators

?eas(res level o$ li;(id

ignal to -/ridge Ampli$ier

ignal to coc"pit $(el ga(ges

%ssential 5' power


40/75

F(el D(antity Ea(ges

:s times 100

ellow arc $rom 200 ls to ero

!otal F(el D(antity>100 C 1&1G ls per tan",

>02H ls total

>200 C 12G ls per tan"

>2GH ls total

Imalance 200 ls


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Fire Optic :ow :evel Warning

'ell J1

enses level o$ li;(id

et to detect 200 :s.

ignal to light in coc"pit


42/75

:ow F(el :evel Warning

Amer :OWann(nciator

:oo"s at F(el :evel, not at ga(ge yellowarc indication

Press to !est light


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?agnetic F(el :evel Indicators

7the old -drip stic"s, (t etter9

Fo(r in each wing

Accessile $rom (nder wing


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F(el !an" Access Panels

panels with center (ttons

are magnetic indicators


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%ach magnetic indicator panel n(mered on panel%ach magnetic indicator panel n(mered on panel andandon wingon wing


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?agnetic Indicator

plastic indicator

metal latch

indeed y n(mer

3(mer on tape is converted to

$(el ;(antity in po(nds y (se o$

a chart


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'hart is located on wheel well

door

(s(ally /:


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A closer loo"K


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!his is the 'hart

%ample

magnetic indicator shows >

it came $rom position

=ow m(ch gas is in the tan" 8

Answer 1>G& J in that wing


50/75

3ote wing diagram at ottom

this, pl(s the n(mers on the

wing itsel$, ma"e it di$$ic(lt to

(se the incorrect n(mers on

the chart.


51/75

:ets p(t this diagram into a schematic and trace the

$(el all the way into the engine


52/75

!his is the diagram in yo(r oo".

It is missing a co(ple o$ items


53/75

t(dy E(ide 5iagram

modi$ied $rom oo"

to show some

important items.

lets (se this one


54/75

/oost P(mp

essential 5' power

1& psi o(tp(t

:P 'oc"

'losed electricallythro(gh $eather lever with

%ss 5''losed electrically thro(gh

overhead switch with /att /(s

Indicators OP%3 or =


55/75

F(el 'ontrol

$irst stage p(mp

oosts psi y >0 psi

Press(re Pic"(p

A$ter $irst stage p(mp'AP light # %ss 5' power

Ea(ge # ?ain 5' power

A?% PI'L


56/75

F(el Filter

i$ clogged, proaly ice

not shown is $(el6oil heat

echanger. A(tomatic system

also not shown

second press(re pic"(p

point downstream o$

$ilter. 'ompares to

press(re (pstream o$

$ilter. 'AP ann(nciator-F


57/75

FUEL

FILTER

FUEL

FILTERI$ Installed


58/75

econd tage P(mp

/oosts press(re to aove

1000 psi

sends $(el to ?etering

)alve

F(el ?etering )alve

Power :ever

P? :ever

F(el %nrichment )alve

Opens to add additional $(el

d(ring start

10@ to 0@ P?


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!!: /ypass )alve

ypasses $(el whencomp(ter senses over

tor;(e or over temperat(re

F(el h(t O$$ )alve

Feather :ever # mechanical

top /(tton # %ss 5' power

Opened d(ring engine start


60/75

F(el Flow !ransmitter

?eas(res amo(nt o$

$(el passing thro(gh

signal to coc"pit

ga(ge

r(le o$ th(m $(el

$low

*00 pph $or $irst ho(r

00 pph therea$ter


61/75

Flow 5ivider

divides $(el etween

primary and secondary

$(el noles

Primary only # d(ring

start

need speci$ic (rn

pattern

econdary "ic"s ina$ter 0@ P?

promotes contin(o(s

(rn


62/75

Flow 5ivider

not pilot re;(ired "nowledge

i$ not wor"ing correctly, engine indications will e anormal


63/75

Purge Valve

this is important to (nderstand=igh press(re 7P>9 air $rom engine

=eld in storage y control

valve

On sh(tdown, p(shing !OPF(el sh(t o$$

'ontrol valve opens

!rapped air $orces all

resid(e $(el thro(gh $low

divider and o(t noles into

the com(stor


64/75

P(rge )alve cleans lines and

noles o$ $(el

On h(tdown, 'aptain will loo" $or

hort rise in %E! as $(el is p(rged

hort rise in P? e$ore rollac"

top (tton sho(ld e held $or

minim(m o$ & seconds to ins(re $(ll

p(rge action

7we teach hold till &0@ P? 9


65/75

(mmary

F(el in the wings

F(eled Overwing at o(toard

/oost P(mp control in coc"pit

'ross$eed control in coc"pit

D(estions 8

:P coc"

!wo stage engine driven p(mps

=P FO)

%ngine p(rge on sh(tdown


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F(el /oost P(mp and 'ross$eed 'hec"

$irst $light o$ the day

a$ter engine start


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:%F! /OO! IE=! /OO!'OF%%5

F

1 2 >


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LEFT BOOST IE=! /OO!'OF%%5

F


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F


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F # OFF


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F


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F


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F # O3


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F


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D(estions 8

Fuel sistem JS31 jetstream

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