COMAC ARJ21-700 - Page 174

ARJ21-SVV19-13120-00
RampServicingOperation
Instruction
(c)Whenbatterypowerisusedforrefueling,setthePOWERSELECTIONswitchtoBATTERY
ontherefuel/defuelcontrolpanel.
NOTE:
Theaircraftbatterypowersupplycanbeusediftheexternalpowersupplyisnot
available.Theonlylimitationtothisoperationisthebatterydischargetime.Com-
pletetherefuelingoperationassoonaspossible.Afullychargedbatterycanop-
eratetherefuelingsystemfor15-20min.
B.Procedure
(1)AutomaticPressureRefueling
(a)Makesurethattherelatedswitchesontherefuel/defuelcontrolpanelaresettothese
positions:
SwitchNamePosition/Status
REFUELSELECTIONAUTO
LHTANKREFUELINGCLOSED
RHTANKREFUELINGCLOSED
DEFUELINGCLOSED
(b)Makesurethattherelatedannunciatorsontherefuel/defuelcontrolpanelshowasfollows:
SwitchNamePosition/Status
LHTANKCLOSEDOff
RHTANKCLOSEDOff
DEFUELINGOPENOff
(c)Removetherefuel/defueladaptercapinthefwdrefuelcompartmentattherightwingfront
spar.
(d)Doaninspectionoftherefuel/defueladapterbeforeyouconnecttherefuelnozzle.
1)Makesurethattherearenofuelleaks.
2)Makesurethatthematingsurfacebetweentherefuelnozzleandrefueladapteris
freefromunwantedmaterialandnotdamaged.
3)Makesurethatthecapbindingwireisnotmissingordamaged.
(e)Connecttherefuelnozzletotherefuel/defueladapter.Rotatethehandleattheendofthe
refuelnozzletoopentheshutoffvalve.
(f)Pressurizetherefuelingsystemto35psi～50psi(241.3kPa～344.7kPa).
NOTE:
Refuelingunderalowerpressureisallowed,however,itwilltakemuchlongertime.
(g)Makesurethatthereisnofuelowatthistime,andtheannunciatorsontherefuel/defuel
controlpanelshowasfollows(precheckoftheshutofffunction):
ARJ21-A-13-12-18-03A-211A-A
Issue001,2023-01-29
Page2of6
Applicableto:ALL