版次CQHraisedsomequeriesregardingthedispatchconditionofportableoxygenbottleonboardinA320FCOMPRO-SPO-20(PROCEDURES-SPECIALOPERATIONS-FLIGHTWITHOUTCABINPRESSURIZATION).PleasefindtheattachedFCOMextractedpages.EMERGENCYDESCENTINCASEOFRAPIDIntheeventofdepressurization,oxygenisdtopassengersthroughanindividualmask.Thecapacityoftheunitsissuchthattheaircraftmustdescendandremainbelowthefollowingprofile.Asyoucansee,thedurationon“emergencycabinaltitude/descentprofile”from14,000ftto10,000ftis30minutes,CQHwouldliketoknowwhetherthereisanytimerequirementfrom10,000ftto8,000ft.CQHreportedthistimefromcabinaltitude10,000ftto8,000ftcouldimpactthedispatchoftheaircraft,asinthisflightleveltheoxygensupplytopassengers(2%)forfirstaidpurpose,isachievedbyportableoxygen.AsperFAR121.333,(e)(2)[…]theremustbenotlessthana10minutesupplyforthepassengercabinoccupants.”(e)(3)[...]Forfirst-aidtreatmentofoccupants[…],asupplyofoxygenmustbeprovidedfortwopercentoftheoccupantsfortheentireflightaftercabindepressurizationatcabinaltitudesabove8,000ft,butinnocasetolessthanone.Foryourinformation,31A320-214s(MSN2939,3014,3023,3747,3819,4072,4093,4244,4331,4366,4373,4375,4499,4586,4738,4750,4760,4809,4816,4909,4978,5022,5051,5108,5378,5403,5434,5446and5466)inCQHfleetareequippedwithportableoxygenbottles,andA320MSN978,1686,1769,1852,1920areequippedwithsixportableoxygenbottles.Isthereisanytimerequirementfrom10,000ftto8,000fton“emergencycabinaltitude/descentprofile?FCOMPRO-SPO-座艙高度從14000英尺下降到10000英尺高度，“應(yīng)急座艙高度/下降剖面”30100008000英尺，在“應(yīng)急座艙高100008000英尺的時間會影響到飛機(jī)的放Theemergencydescentprofileisbasedonstandardobstacleclearanceandregulations;CQHhas15minuteschemicaloxygensystemallowingtheaircrafttodescendto14,000ftorbelowin13minutesafteracabindepressurization,beforetheoxygensupplyhasterminated.Whenthechemicaloxygensupplyisfinished,operatorsmustensurethatenoughportableoxygeniscarried,inordertocomplywiththeregulations:Shouldoperatorswishtoremainabove10,000ftuptoandincluding14,000ft,regulationsrequesttoprovideoxygenfor10%ofthepassengers(withnolessthan10minutesofoxygensupply)iftheflightlastsmorethan30minutesabove10,000ftuptoandincluding14,000ft.Ifnotpossibletocomply,theaircraftcanflyabove8,000ftuptoandincluding10,000ftiffirstaidoxygeniscarriedfor2%ofthepassengers(nolessthanonepassenger).Thisconditionisgenerallyachievedbyportableoxygen.Whenthisfirstaidoxygensupplyisnolongeravailable,theaircraftshoulddescendto8,000ftorbelow.Note:JAR-OPS1.760andFAR121-333defineat2theminimalamountofportablesoxygencarriedontheaircraft.Pleaserefertotheseregulationsformoredetails.Asaconclusionthereisnotimelimittoflyabove8,000ftuptoandincluding10,000ftaslongasfirstaidoxygeniscarriedonboardfor2%ofthepassengers(nolessthanonepassenger).Theoperatorshouldensurethattheoxygenamountprovidedbytheportableoxygenbottlesissufficienttocomplywiththisrequirement.Wehopethissatisfactorilyrespondstoyourrequest.Weencourageyoutoprovideuswithyourfeedbackusingthequestionnairebelow,andweremainavailablefo