Document 6BXa1YQdvRX8v7e9d9oE8rap3

o < of The Boeing ARR2G Company _ 0943 Washington, DC FACSIMILE LEAD SHEET Please Check One: Destroy Copy _X Sender Will Pick Up Date:O1 ctob0 er .2000 No. of Pages LEAD +4. `Time Sent ToCh Auea r rlesM CompanyUSEnvironmentalProtectionAgency Bldg Dept Oo Se Phone No. Fax Phone No. (202) 260-8168 Check Phone No. Special Instructions: From:MathewC.Frank Company: TC heo Boeinm g pany Bldg Dep. oe wwe Phone No._703/465-3243 Fax Phone No. _703/465.3034 Check Phone No. _703/465-36 3 `Iotphpoourtguhntittyhstomdiigshctusbsethhieslpifsusluea.s bI alcokogkrfoournwdarfdor1osueremienegtyinogu oonn TThhuurrssddaay.y atTh9a:n00ksA`Ma.gain for the Matt Frank Con tain NO[e=1] 1 ay go> xz 3323 = 352 z =S <> FE . ||| T1h2e00BWasiiengn Cio.mpany Angon. 22200-1988 | | October g, 2000 | Charles M. Auer | | Director, Office of PCohlelmutiicoanlPCroenvternotlisonDiavnidsiTonox(i7c4s05) | AUrSieElPRAioHseBaudiqludairngters | 1200 Pennsylvania Avenue, Nw. | Washington, DC 20480 7 soENG || Dear Mr. Auer: || FcrooersnittsahtieannstpaFhsCyt-d9r28a5,uyiaecaffrllsuu,oidrTiinhnaettesBdocceoiomnmmgperoCcuoinmadplatahnnaydt Ihmsialcsiritutatirciyallitzrieandnpasrpneovrsetrnoatsiiirnocrnga-fdater.treeTrsoittoiernagftiifoignre | | oefxttrheemaeilrycreaffftescthiyvderianuiinchisbiytsitnegmercoosmipoonnoefntthse.seThhyedrFaCul-i9c8paadrdtistidvueehtaosepxrpoovseunre tothe hydrauiic fluids. The 3M company, || dmaatneu,ftahcetruereisrnoof FalCt-e9r8n,atiisvpehmaastiernigalouftorisFCpw-rh9oi8dc.uhctiisocnurorfetnhtlsyctrihteicoanllaydddiotmievset.icT:o || | itRniutlsheeBo(feSuitNnuUgreR'.s) uBtnhoadeteircnsogtuaidnsdacilunsgroictihoaBntocEaeiPmnAga'disnttahbeaintlditsthytetooSpuNrsoUepRoFsCceo-u9al8dSiifgnniiimtfsifhcyoadenrtaNuleiwc fUlsuei.ds | developmant of a workable substitute material. || | taSiniuyvidaSnaNdtdUhieRticpvrreiteiisnceaclrovamenmtBieo-reecirionasgli'vsaenapbdriolmipitelyritttoayrcoyofaniFtrCci-rna8uf8ot,.tBoouesiengFCis-9r8eqausesathiyndgrtahualtic || | hcTyohdmermaecuorlncitciiafnliuieoddrwhuiotsuhesteohfheotlFhedC-Fu9Gs8-e9sa8dodfistdpiirvtoeidviusectuissnetodhuaritnhcyaocncrtalauoilsniecda-fsllioumioidplsasirysassdtadfeietm.iveU,nitihkee || | oairripfltanhee.hyTdhrearueliics lliittdle n`oepepdorstutnoibtye maintenance workers are required froerpelxepnoissuhreed.(wEhviechn to wear proper iisf tnhoetrae on an irsouatnineextaecrtnlayl)l,eak | uinsceluodfinFgC-g9lo8veins,ousrafaeitrycrgalftashsyedsr,aualnidc fplruoitdescwtiilvepgoesapere.lrisAtoesnatalhrrpeerasotutltetoc,toaiupvrperwsooqvruekiseprorfsenfotor,e | the public at large. | Background |{ Phosphate ester hydraulic luds wers first introduced in the 1950's as a iro | Trehseissteanpthoflsupidharteepleascteemrefnltuifdosrptehrefhoirgmheldy fsaltaimsfmaacbtolreilpyewtirtohlreeusmp-ebcatsteodeflruiads.n when uncontaminated. Early in the 1970's, however, it was discoveredthat 2 a BOEING Socecvuerrrseedlwechterno-tchheesmeicfalluiedrsobsieocnaomfececrotnatianmcionmapteodnewnitthsoorfgtahneichycdhrlaourliince system sceormvpicoeunwedrseufsoeudndtotcolheaavnehyhdyrdarualuilciccfolmupidonseynsttse.msSwoitmheaasimrpulcahneassin30co0m0mperpcmial cofhltohreinfeluiind tbhyeiarsflmuuidcshamapsl5est.imIensm. aBnayccaaussees,thcehrieorwianesinnocrseuaitsaabdlethaenedroefsfievcetnievess cdleevaenlionpgefdlutihdattheaftfewcatsivenloyteclhilmoirniantaetedde,raosrieofnosrmoulloantgedahsytdhreauclhiicorfliuniedcwoanstent was less than 1000 ppm. This newfluid contained the FC-98 additive. Bosing also set a maximum fluid in-service limit for chlorine of 200 ppm. TBohaeirneghfalveeetbseiencnentohereicnutrrroidnugcthiyodnroafutlihcefcluuirdreenrtoshiyodnr-aruelliactefdlupidrsobinle1m9s74i.n the TBehceacursieticoaflidtsifanfteir-eenrcoesihvaesqubaleietinest,hethiasddhiydtriaounliocf fFlCui-d9w8itthotthheeFhCy-d9r8aualdidcitfilvueid. comprises the vast majority of aircraft phosphate ester hydraulic fivid in use tpohdoasyp.haTtoedeasttee,rahllydBroaeuilnigc,flfuoirdsmeurtiMiczeDoFnCn-e9l8l. Douglas, and Airbus approved cChhlloorriinnaetecdonctlaemainniantgifolnuirdesmianiunsseatsoidganyifiincatnhte hurdle. United SWthaitlese,thcehrlosrminaaytebdesonlovne-nts hayrderastuillliaccftliuviedlysaimn pulseesownitahir5cr0a0ft~th2r0o0u0ghpopumt tchheiowroirnle.d. Boeing is still seeing Electro-chemical Erosion and itCs onsequences FmeCt-e9r8iinngtehdegheysdorfacuolnictrfolulidvparlevevsenatnsderleelcattredochhyedmriaculailcecroosmipoonneonnttsh.e aElnedctmreot-aclhecmoimcearlseroorseiodngeisnvwoiltvheisn acnonetlreocltrvoallyvteisc. reCaocnttiroonlbveatlwveeesnarheydtrhaeulpircimfiauriyd targets of electro-chemical erosion. These valves, which are designed to function for the life of the aircraft, rely on the sharp, accurate edges of their tpinheteresfreonarelmdapganerctsescothfoatcnhogenetsrsuorltfhtaehceerefoslrpoawocnotsfueahtycodhrraartuahlceitcevrafillsuvtieidcctsoonotafrnoalasvc.atluvOaetnoara.nndTathihreepldaence,aythoifs could be noticad by slow or partial rasponsa from the component controlled by the valve. Valve itself. eUrnodseironnaolrsmoalinocpreeraasteisngthceonadmiotiuonnts,oaf intemal leakage small amount of within the valve fluid travels through vcaalllveedsianntdemoatlhelreackoamgep.onVeanltvseteorporsoivoindienbcerneeafsiecsiatlhleubarmiocautniotn.ofTfhluiisd stmhaatllpaflsoswes1s through each valve even when the valves are not operating. As a consequence opfuampssigniinftihcaenhtyidnrcaruelaiscesiynstinetmermnaalylneoatkabgee ltahrrgoeuegnhoaugnhumtboeprowofervatlhveess,ytshteems 3 a BOEING arierqpuliarneed ofporereaftfieocntsi.ve Irteesmpsotnypsicfarlolym ptohewehryderdaublyichayldlryapuloiwcesriendcliutdeemfsirgehqtuciornetdroflo,r abirrackrea,ftloapnedriantgiognesa.r,Hayndrdasutleiecriflnugidspyestrefmosr.manScoemies ooff ptahretsiecuslyarstceomnscearrnabcreictiacualsefo the redundancy provided by a common-mode failure that mauflfteicptlsealhlysdryasutleimcsssyismtuelmtsaniesocusolmyp.romised if thera is rSeinndceereaxicrecrsasfitvseyisntteemrnsalinleeffaekcatgivee,witthheinaiarihiyndersaaurleicrseqyusitreemd has the potential to monitor, by to peerroisoidoincctaesntibneg,dettheectiendt.emaWlhleenaktahgeelienaekaacghe ehyxdcreaeudlisctshyestmeanmu.faTchtiusreisr'hsolwimits, the airine replaces the failed valves or components containing valves. Development, Qualification, and Approval of Substitute nGoirveitns tshueppplrioervsenhapveerfeonrgmaangceed oifn FaCn-y9r8esoevaerrcthhaenpdasdtev2e5lyoepamresn,tneoiftahenr Bosing faolrtearnsautbisvteitaunttei-meartoesriivaelafdodritFiCv-e.98,InBooeridnegr'tsosduepvpellioepr,s qwuoaullifdyhaanvdeotbotainiintiaapteproval ernesgeaagrechinaenxdtdenesvievleoplmaebnorta,tocroymteestuipngw.ithBoaecianngdaidnadteFAreApwlaocuelmdetnhtenfluried,quainred aepxptreonvsailv,e tqhuealfilfuiicdatmiuosntteusntdinegrgaondfulfllifgihitghatpsperrovviacle. evOanlucaetiwoen (rFeScEa)iv.e fInigohrtder to initiate the FSE, al formal fluid qualification testing must first be completed, rreecpeoirvtsedi.ssued, willing and capable operators identified, and FAAapproval The FSE demonstrates the following: + TCohmaptatthiebicliatnydoifdattheefclainddpiedraftoerwmisthasexeisxtpiencgtfelduiidns tihn ealslypsrtoepmo;rtions; That the candidate hydraulic system; fluid does not cause any abnormal wear in the CTohmapattitbhierleitayreofnothaebcnaonrdmiadlatcehfalnuigdewsittho the the hydraulic pumps; acidity level, nor any adverse Thchaatngtehes ftlouitdheisfmliuisdcitbhlate icnouallldrdateigorsawdiethseyxsitsetminpgefrlfuoidrsmawnitche;noanhdarmful effects. The FSE gives Bosing and operators the reassurance that the fluid will be suitable in the airplane environment. Based on past experience, research and development, laboratory testing, and Ffluilglhtfiagphptrsoevnavliocfe aevcaalnudaitidoantewislubtsatkiteuatte laeraestan1tiyceiapra.teAdftteortFaSkEe,fr2omsa5mptloi8nygeaorf s. sOEa ING a`cnodmdpeotneerniotrsatmiuosn.t be removed from the airplanes and examined for signs of wear aAdsdiatirveesuflotr, FiCti-s9e8x,psehcotuelddtBooteaikneg7b1e0c1o0mypeealrlsetdotdoedvoelsoop. and qualify a substitute 4W8e5-a3p2p4re3csihaoteulydoyurouatnteenetdiotnotcoontthiasctimmpeortprainotritsosuoeu.r m|eceatninbgeorneaOcchteodbeart (1720,3) 2000. Sincerely, Matti) Famke Matthew Frank ~ 5a