ASN Aircraft accident Boeing 747SR-46 JA8119 Ueno ...

Narrative: JA8119 was a Japan Air Lines Boeing 747SR, a short range variant of the Boeing 747 Series 100. The was aircraft specifically ... Home Aviationsafety Database Investigation News Photos Statistics Contactus About      Home»Database»1985   Status:Final Date:Monday12August1985 Time:18:56 Type:Boeing747SR-46 Operator:JapanAirLines-JAL Registration:JA8119 MSN:20783/230 Firstflight:1974-01-28(11years7months) Totalairframehrs:25030 Cycles:18835 Engines:4Pratt&WhitneyJT9D-7A Crew:Fatalities:15/Occupants:15 Passengers:Fatalities:505/Occupants:509 Total:Fatalities:520/Occupants:524 Aircraftdamage:Destroyed Aircraftfate:Writtenoff(damagedbeyondrepair) Location:26km(16.3mls)SWofUenoVillage,Tanodistrict,GunmaPrefecture( Japan) Crashsiteelevation:1530m(5020feet)amsl Phase:Enroute(ENR) Nature:DomesticScheduledPassenger Departureairport:Tokyo-HanedaAirport(HND/RJTT),Japan Destinationairport:Osaka-ItamiAirport(ITM/RJOO),Japan Flightnumber:JL123 Narrative:JA8119wasaJapanAirLinesBoeing747SR,ashortrangevariantoftheBoeing747Series100.Thewasaircraftspecificallyconfiguredfordomesticflightswithahighdensityseatingarrangement.OnJune2,1978theaircraftoperatedonaflighttoOsaka(ITM).Itfloatedaftertouchdownandonthesecondtouchdownthetailstrucktherunway.Theaircraftsustainedsubstantialdamagetotherearundersideofthefuselage.Therearpressurebulkheadwascrackedaswell.TheaircraftwasrepairedbyBoeing.Engineersreplacedthelowerpartoftherearfuselageandaportionofthelowerhalfofthebulkhead.Sevenyearslater,onAugust12,1985,JA8119hadcompletedfourdomesticflightswhenitlandedatTokyo-Haneda(HND)at17:17.Thenextflightwastobeflight123toOsaka(ITM).TheaircrafttookofffromTokyo-Hanedaat18:12.Twelveminuteslater,whileclimbingthrough23900feetataspeedof300knots,anunusualvibrationoccurred.Animpactforceraisedthenoseoftheaircraftandcontrolproblemswereexperienced.AdecompressionhadoccurredandthecrewgotindicationsofproblemswiththeR5door.Infact,therearpressurebulkheadhadruptured,causingseriousdamagetotherearoftheplane.Aportionofitsverticalfin,measuring5mtogetherwiththesectionofthetailconecontainingtheauxiliarypowerunit(APU)wererippedofftheplane.Duetothedamage,thehydraulicpressuredroppedandailerons,elevatorsandyawdamperbecameinoperative.Controllingtheplanewasverydifficultastheairplaneexperienceddutchrollsandphugoidoscillations(unusualmovementinwhichaltitudeandspeedchangesignificantlyina20-100secondscyclewithoutchangeofangleofattack).Theaircraftstartedtodescendto6600feetwhilethecrewtriedtocontroltheaircraftbyusingenginethrust.Uponreaching6600feettheairspeedhaddroppedto108knots.Theaircraftthenclimbedwitha39degreepitch-uptoamaximumofapprox.13400feetandstartedtodescendagain.At18:56JAL123finallybrushedagainstatreecoveredridge,continuedandstrucktheOsutakaRidge,burstingintoflames. ProbableCause:CAUSE:"Itisestimatedthatthisaccidentwascausedbydeteriorationofflyingqualityandlossofprimaryflightcontrolfunctionsduetoruptureoftheaftpressurebulkheadoftheaircraft,andthesubsequentrupturesofapartofthefuselagetail,verticalfinandhydraulicalflightcontrolsystems.Thereasonwhytheaftpressurebulkheadwasrupturedinflightisestimatedtobethatthestrengthofthesaidbulkheadwasreducedduetofatiguecrackspropagatingatthesplicedportionofthebulkhead'swebstotheextentthatitbecameunabletoendurethecabinpressureinflightatthattime.Theinitiationandpropagationofthefatiguecracksareattributabletotheimproperrepairsofthesaidbulkheadconductedin1978,anditisestimatedthatthefatiguecrackshavingnotbefoundinthelatermaintenanceinspectioniscontributivetotheirpropagationleadingtotheruptureofthesaidbulkhead." Accidentinvestigation: Investigating agency: AAICJapan Status:Investigationcompleted Duration: 1yearand10monthsAccidentnumber:FinalreportDownloadreport:Finalreport Language: English Classification: Pressurebulkheadfailure Explosivedecompression Lossofcontrol Sources: »ApplyingLessonsLearnedFromAccidents:Accident/IncidentSummaryJapanAirlinesFlight123,Boeing747,GunmaPrefectureJapan»FlightInternational14September1985(4-7)»Job,MacarthurandSteveSwift.JAL123:520Lost-It's20yearssincetheworld'sworstsingleaircraftairlineraccident.In:FlightSafetyAustralia.-Vol.9,no.4(July,August2005)page28-33.[http://www.casa.gov.au/fsa/2005/aug/28-33.pdf] Follow-up/safetyactions FAAissued6AirworthinessDirectives NTSBissued8SafetyRecommendations Issued:19-NOV-1985To:Boeing747AD85-22-12 Within30daysaftertheeffectivedateofthisAD,performaone-timevisualinspectionoftheaftsideoftheaftpressurebulkheadforevidenceofrepairsordamage. Issued:05-DEC-1985To:FAAA-85-133 RequirethemanufacturertomodifythedesignoftheBoeing747empennagesothatintheeventthatasignificantpressurebuildupoccursinthenormallyunpressurizedempennage,thestructuralintegrityofthestabilizersandtheirrespectivecontrolsurfaceswillbeprotectedagainstcatastrophicfailure,andtoincorporateassociatedmodificationsonallBoeing747airplanes.(Closed-AcceptableAction) Issued:05-DEC-1985To:FAAA-85-134 RequirethemanufacturertomodifythedesignoftheBoeing747hydraulicsystemssothatintheeventasignificantpressurebuildupoccursinthenormallyunpressurizedempennage,theintegrityofallfourhydraulicsystemswillnotbeimpaired,andtoincorporateassociatedmodificationsonallBoeing747airplanes.(Closed-AcceptableAction) Issued:05-DEC-1985To:FAAA-85-135 ReevaluatethedesignoftheBoeing747and767aftpressurebulkheadbyrequiringBoeingtoanalyzeandtestfurtherthebulkheadtodemonstratethevalidityofthefail-safe"flapping"failuremode.(SupersededbyA-85-138)(Closed-Superseded) Issued:05-DEC-1985To:FAAA-85-136 EvaluateanyproceduresapprovedtorepairB-747andB-767aftpressurebulkheadtoassurethattherepairsdonotaffectthe"fail-safe"conceptofthebulkheaddesignwhichisintendedtolimittheareaofpressurereliefintheeventofastructuralfailure.(Closed-AcceptableAction) Issued:05-DEC-1985To:FAAA-85-137 RevisetheinspectionprogramfortheB-747rearpressurebulkhead,toestablishaninspectionintervalwhereininspectionsbeyondtheroutinevisualinspectionwouldbeperformedtodetecttheextentofpossiblemultiplesitefatiguecracking.(Closed-AcceptableAction) Issued:13-DEC-1985To:FAAA-85-138 Determinewhichtransportcategoryairplaneshavedome-shapedaftpressurebulkheadsandascertainthatthe"fail-safe"criteriaforthepressurebulkheadsofthoseairplaneshavebeensatisfactorilyevaluated. Issued:13-DEC-1985To:FAAA-85-139 Evaluateanyproceduresapprovedtorepairtheaftpressurebulkheadofanyairplaneswhichincorporateadome-typeofdesigntoassurethattheeffectedrepairdoesnotderogatethefail-safeconceptofthebulkhead. Issued:13-DEC-1985To:FAAA-85-140 Issueamaintenancealertbulletintopersonsresponsiblefortheengineeringapprovalofrepairstoemphasizethattheapprovaladequatelyconsiderthepossibilityofinfluenceonultimatefailuremodesorotherfail-safedesigncriteria. Issued:19-MAY-1986To:Boeing747AD86-08-02 RequiringtheadditionofastructuralcoverfortheopeningwithintheempennagetoprovideaccesstotheverticalfinofallB747models.Thisistopreventstructuralfailureoftheverticalfinintheeventoffailureoftheaftpressurebulkhead. Issued:13-JUL-1987To:Boeing747AD87-12-04 Requiringinstallationofahydraulicfuseinthenumber4hydraulicsystemonBoeingModel747seriesairplanes. Issued:10-DEC-1987To:Boeing747AD87-23-10 RequiringinspectionfordamageandcrackingoftheaftpressurebulkheadonBoeingModel747airplanes.(SupersededbyAD98-20-20) Issued:22-SEP-1998To:Boeing747AD98-20-20 SupersededAD87-23-10,addingrepetitiveinspections.(SupersededbyAD2000-15-08) Issued:06-SEP-2000To:Boeing747AD2000-15-08 SupersededAD98-20-20,requiringthataone-timeinspectiontodetectcrackingoftheuppersegmentofthebulkheadwebbeaccomplishedrepetitively,andaddsadditionalrepetitiveinspectionstodetectcrackingoftheupperandlowersegmentsoftheaftbulkheadweb. Showall... Photos accidentdate:12-08-1985type:Boeing747-SR46registration:JA8119 accidentdate:12-08-1985type:Boeing747-SR46registration:JA8119 accidentdate:12-08-1985type:Boeing747-SR46registration:JA8119   Map Thismapshowstheairportofdepartureandtheintendeddestinationoftheflight.Thelinebetweentheairportsdoesnotdisplaytheexactflightpath.DistancefromTokyo-HanedaAirporttoOsaka-ItamiAirportasthecrowfliesis401km(251miles).Accidentlocation:Exact;deducedfromofficialaccidentreport. ThisinformationisnotpresentedastheFlightSafetyFoundationortheAviationSafetyNetwork’sopinionastothecauseoftheaccident.Itispreliminaryandisbasedonthefactsastheyareknownatthistime. languages: Share Tweet Boeing747 1559+built15thloss10thfatalaccidentTheworstaccident »safetyprofile  Japan Theworstaccident »safetyprofile TheAviationSafetyNetworkisanexclusiveserviceprovidedby: QuickLinks: CONNECTWITHUS: ©2022FlightSafetyFoundation 701N.FairfaxSt.,Ste.250 Alexandria,Virginia22314 www.FlightSafety.org