( ^ Ronal d J

. Hind«rb«rg* rTh e Boein g Compan y Lea d Administrato rP.O

. Bo x370 7 M C 03-5 2 Delegate d Complianc e ()rc) Seattle, WA9812 4 -220 7 Commercia l Airplane? ;

. ' 1 -J: ^ 

### UW ; 

### 2 0 201 0

.. . if.0-3: ) BDCO-10-0541 6 \ \'^^S ^ U.S
. Departmen t

o f Transportatio n-^ ^ Docke t Managemen t

Syste m'-r

120 0 Ne w Jerse y Avenue , S E^ ^ Wes t Buildin g Groun dFloor , Roo mW12-14 0 ^- ' Washington , D.C
. 2059 0 Subject : Petitio nfor Exemptio nfromTitl e 1 4 Cod e o f Federal Regulation s sectio n25.1309(c ) a t Amendmen t

25.11 6 withRespec t

t o Cre w Annunciatio no f

th e Statu s o f

Fue l Syste m Component s Model : 787- 8
Th e Boein g Compan y respectfull y submit s thi s petitio nfor exemptio nfrom specifi c aspect s o f

Titl e 1 4 Cod e o f

Federal Regulation s Sectio n25.1309(c ) a t Amendmen t

25.11 6 for

alimite dnumbe r

o f Genera l Electri c (GE ) GEnx-l B powere d787- 8 airplane s a s describe dinth e summary below

. Th e enclosur e t o thi s lette r provide s th e detail s o f

th e petitio ni naccordanc e withTitl e 1 4 Cod e o f Federal Regulation s Sectio n11.81
. Th e followin g summary i s provide dfor th e Federa l Registe r

i naccordanc e with1 4 CFRSectio n11.81(f)

.
Summar y fo r

Federa l Registe r Petitioner : Th e Boein g Company
. Sectio no f

1 4 CFRAffected : Sectio n25.1309(c)

. Descriptio no f

Relie f Bein g Sought : Boein g i s requestin g relie f fromful l complianc e to Sectio n25.1309(c ) fo r th e General Electri c (GE ) GEnx-l B powere d7S7- S aiiplane s fo r th e unambiguou s an dtimel y indicatio nto th e flight cre w to alei l the mo f

a nanticipate dfue

l syste m contamination

. I

f granted , thi s exemptio nwil l allo w sufficient tim e fo r Boein g to develop , certif

y andincorporat e into productio nane w alertin g syste mthi s i s fully complian t

wit hSectio n25.1309(c)

. Th e exemptio nwoul dallo w relie f fro m th e requiremen t

i nSectio n25.1309(c ) to provid e indicatio nto th e cre w o f anticipate dfue

l syste mcontaminatio nfo r General Electri c GEnx-l B powere d 787- S aitplane s delivere dup t o Jun e 30
. 201 4 andDecembe r 31
. 201 8 fo

r retrofi t incoiporation

.^

. Pag e 2 Docke t Managemen t

Svste m BDCO-10-0541 6
Very tall y yours ,

/Christin e Thompso n iLea dProjec t

Administrator , Developmen t Project s 1:425 ) 266-6572 , M C 03-5 6 FAX : (425)294-934 0
Enclosure : Petitio nfo r Exemptio nfrom1 4 CFR25.1309(c ) a t Amdt

. 25-11 6

c c Nam e Al i Bahrami Ke nSchroe r Sherry Veve a To mThorso n Davi dSola

r Ke nFontain e Lette r ED T ED T ED T ED T ED T ED T Enclosure s

ED T ED T ED T ED T ED T ED T Comment s

ANM-IOO S ANM-IOO S ANM-140 S ANM-140 S EAS A Pane l 0 EAS A Pane l 7Enclosur e t o BDCO-10-0541 6 Pag e 1 of6 Petitio n fo rExemptio n fro m 1 4 CF R 25.1309(c ) Amendmen t 25-11 6 fo rGenera l Electri c

GEnx-l B Powere d 787- 8 Airplane , FA AProjec t Numbe rPS06-041 4 Nam e an d Addres s o fth e Petitione r CM

. Thompson , Manager , Lea d Projec t Administrator , Developmen t Project s Th e Boein g Company , P O Bo x3707 , Seattle , Washington , 9812 4 B

. Sectio n o fth e Cod e o fFedera l Regulation s (CFRs ) tha t ar e affecte d A s provide d fo ri n 1 4 CF R 11.61(b) , Boein g hereb ypetition s fo rexemptio n t o th e followin g CFRs : Regulatio n 1 4 CF R 25.1309(c ) A t

Amendmen t 11 6 Whic h Require s

(c ) Warnin g Informatio n mus t b e provide d t o alert th e cre wt o unsafe syste m operatin g conditions , an d t o enable the m t o tak e appropriat e correctiv e action

. Systems , controls , an d associate d monitorin g an d warnin g mean s mus t b e designe d t o minimiz e cre w error s whic h coul d creat e additiona l hazards

.Enclosur e t o BDCO-10-0541 6 Pag e 2 of6
Th e exten t o frelie fbein g sough t Regulatio n 1 4 CF R 25.1309(c ) Amendmen t 12 0 Requires :

Th e FA Aha s determine d t o compl y wit h §25.1309(c ) fo r th e Genera l Electri c GEnx-l B fue l system , a n unambiguou s an d timel yIndicatio n t o th e fligh t cre wi s require d t o alert the m o f a n anticipate d fue l syste m contamination

. Th e purpos e of thi s Indicatio n i s t o enable th e fligh t cre wt o tak e appropriat e correctiv e action

. Relie f I s necessan / because : Th e 787- 8 /

GEnx- 1 B engine wil l b e on e of th e firs t Genera l Electri cengine s t o incorporat e a metho d t o detec t gros s fue l syste m contamination

. Th e FA Aonl y recentl yprovide d guidanc e regardin g wha t I s neede d t o sho wcomplianc e t o §25.1309(c ) fo rindicatio n o f Impendin g bypas s of a componen t upstrea m ofth e mai n fue l filter

. Therefore , I t woul d creat e a significan t burde n I f Boein g wer e no w require d t o Incorporat e thi s ne wgros s fue l syste m contaminatio n indicatlon(s ) o n th e firs t productio n 787- 8 airplane s prio rt o Typ e Certification

. Fo rth e 787- 8 fue l system s t o compl ywit h §25.1309(c) , a n unambiguou s an d timel y indicatio n t o th e fligh t cre wI s require d I n th e even t tha t bot h engine s o n th e sam e fligh t ar e subjecte d t o a fue l filte rImpendin g bypas s condition

. Further , t o compl ywit h §25.1309(c) , th e fligh t cre wmus t b e alerte d o f anticipate d fue l syste m contaminatio n tha t coul d clo g th e fue l syste m ahea d of th e engine fue l filter

. Th e purpos e o f thi s Indicatio n I s t o enabl e th e fligh t cre wt o tak e appropriat e correctiv e action

. Wit h thi s petitio n fo rexemption , Boein g I s requestin g relie f fo ra limite d numbe rof787
- 8 airplane s t o allo wsufficien t tim e t o develop , validate , certif yan d Incorporat e Int o productio n a ne wcomplian t gros s fue l syste m contaminatio n Indicatlon(s)

. Followin g Incorporatio n o f th e complian t Indicatio n int o productio n airplanes , Boein g wil l Issu e a servic e bulleti n tha t recommend s al l airplane s delivere d unde r thi s tim e limite d exemptio n b e retrofitted

. Descriptio n of relie f sought : Th e requeste d time-limite d exemptio n wil l allo wth e Boein g Mode l 787- 8 relie f fro m th e requiremen t o f §25.1309(c) fo ra n unambiguou s an d timel yEnclosur e t o BDCO-10-0541 6 Pag e 3 of6 Indicatio n t o th e fligh t cre wof gros s fue l syste m contamination

. Th e relie f sough t I s limite d t o thos e 787- 8 aircraf t complete d prio rt o th e productio n incorporatio n of th e complian t message . Th e productio n Incorporatio n of th e complian t messag e wil l firs t b e accomplishe d b yJun e 30 , 2014

. Aservic e bulleti n wil l b e availabl e n o late rtha n Jun e 30 , 201 4 suc h tha t al l 787- 8 airplane s delivere d unde rthi s exemptio n ca n orde r part s an d Instal l a complian t configuration

. Th e Boein g servic e bulleti n wil l recommen d tha t al l airplane s b e retrofitte d b yDecembe r 31,2018

.Enclosur e t o BDCO-10-0541 6 Pag e 4 of6
Descriptio n o fth e Issu e
Th e FA Arecentl yclarifie d wha t i s require d t o sho wcomplianc e t o §25.1309(c ) fo rIndicatio n of gros s fue l contamination

. Give n th e advance d stag e of th e 787-8/GEnx- 1 B program relativ e t o gainin g basi ctyp e desig n certification , Boein g i s requestin g thi s time-limite d exemptio n t o enabl e a robust , reliabl e desig n an d verificatio n of th e subjec t alerting

. Boein g agree s tha t sever e fue l syste m contaminatio n ca n lea d t o undesirabl e engine effects , suc h a s los s of thrust

. Th e FA Aha s foun d th e 787-8/GEnx- 1 B desig n t o b e non-complian t t o §25.1309(c ) fo rthi s Issue

. Thi s FA

Apositio n I s base d o n th e lac k of a n unambiguou s an d timel yannunciatio n t o th e fligh t crew s ofgros s contaminatio n of th e airplan e fue l supply

. Th e GEnx- 1 B fue l syste m component s tha t hav e th e potentia l t o becom e clogge d b yic e o rfue l contaminant s ar e eac h designe d wit h bypasse s t o ensur e maintaine d commande d fue l flo wt o th e engine

. Th e engin e fue l Indicatio n syste m doe s no t currentl ydirectl yaddres s th e basi cproble m of gros s fue l syste m contaminatio n Indication

. Prio rt o th e expiratio n o fthi s time-llmlte d exemption , Boein g Intend s t o compl ywit h thes e requirement s b yprovidin g a fligh t dec k Indicatio n of gros s fue l syste m contaminatio n usin g a senso rupstrea m ofth e mai n fue l filter

. Additionally , Boein g wil l elevat e th e existin g EICA S fligh t dec k

alert fo ra multiple-engin e fue l filte rImpendin g bypas s condition

. Statemen t o fN o Advers e Affec t o n Safet y
Th e GEnx-l B engine fue l syste m desig n allows fo rth e greates t possibl e toleranc e t o gros s fue l contamination

. Excessiv e fue l syste m componen t blockage of th e GEnx- 1 B engine doe s no t limi t fue l flo wt o th e engine du e t o multipl e bypasse s I n th e design

. Th e mai n fue l filte rI s size d fo rcomplianc e t o §33.6 7 an d subsequentl y§25.997(d)

. Th e fue l straine ra t th e L P pum p exi t provide s additiona l filterin g capabilit yfo rth e system

. Th e fue l straine rI s size d t o protec t th e hea t exchanger s an d hig h pressur e fue l pum p gea rstag e fro m extrem e /

maintenance-Induce d contamination

. Th e fue l straine rdoe s no t sto p particle s tha t ar e withi n th e siz e rang e ofexpecte d contamination

. Thi s contaminatio n I s passe d throug h th e educto rpum p an d th e hea t exchanger s t o th e filter

. Whe n th e filte ri s expose d t o contaminate d fue l an d debri s accumulate s t o th e poin t tha t I t reache s impendin g blockage , a n alert I s provide d t o th e fligh t dec k vi a a n advisoryleve l messag e accordin g t o th e requirement s of §25.1305(c)(6)

. Th e GEnx-l B fue l syste m Indication s provid e fligh t cre wwarnin g informatio n tha t a n unsafe operatin g conditio n ma yexis t vi a th e mai n fue l filte radvisory-leve l messages . Thi s alertin g schem e provide s a n adequat e leve l of safet yfo rth e airplane s affecte d b ythi s exemption

. Thi s i s th e sam e fue l filte ralertin g o n al l Boein g productio n airplanes

. Th e existin g GEn xengine als o Incorporate s a differentia l pressur e senso racros s th e fue l straine rtha t unde rcertai n condition s provide s EICA S Statu s message s an d CM C message s fo radditiona l awarenes s beyon d an ypreviou s G E powere d airplan e model

.Enclosur e t o BDCO-10-0541 6 Pag e 5 of 6 Servic e historystudie s conducte d showe d tha t th e fue l strainer/ filte rarchitectur e use d o n GE90 , GE90-115B , CF6-6 , CF6-50 , CF6-80A , CF6-80C2 , an d CF6-80 E engine s (simila r architectur e of th e GEnx- 1 B engine ) hav e ha d n o know n IFS D o rpowe rInterruptio n event s attribute d t o fue l straine rclogging

. Th e prove n servic e historyofsimila rengine models , th e maintenanc e action s define d t o preclud e th e Introductio n ofsoli d contaminatio n int o th e fue l tank s an d th e existin g fligh t dec k message s an d cre wprocedure s fro m associate d checklist s provid e a n adequat e leve l of safet yfo rth e airplane s affecte d b ythi s exemption

.

Statemen t o fPubli cInteres t Grantin g thi s petitio n I s I n th e public' s Interes t becaus e I t woul d allo wadequat e tim e fo rBoein g an d Its supplie rt o develo p a n effectiv e desig n solutio n t o th e requiremen t t o ad d a fligh t dec k Indicatio n of gros s fue l syste m contaminatio n tha t becam e applicabl e t o th e Mode l 787- 8 wel l afte rth e airplan e developmen t progra m complete d fir m configuratio n o f th e 787-8

. Conversely , I f th e requeste d relie fI s no t grante d th e additio n of th e subjec t fligh t dec k Indicatio n a t thi s lat e stag e o fth e airplan e developmen t program woul d lea d t o delay s I n th e deliverie s o fMode l 787- 8 airplanes

. Th e publi cInteres t wil l b e advance d b yth e gran t of Exemptio n a s I t i s I n th e bes t economi cInteres t o f th e Unite d States

. Man y787- 8 customer s ar e overseas . Furthe rdeliverydelay s of th e 787- 8 ar e no t I n th e Interes t o f th e publi cdu e t o th e potentia l negativ e Impact t o expor t sales , th e balance-of-trade , th e gros s domesti cproduc t an d economi chealt h ofth e Unite d States

. I n addition , withou t adequat e tim e t o develo p a robus t solution , nuisanc e fligh t dec k alert s in
servic e hav e th e potentia l t o reduc e operationa l safet ywhe n fligh t crew s ar e taske d t o respond t o fals e indication s potentiall yresultin g i n unnecessaryfligh t diversions , landin g a t airport s tha t the yar e no t familia rwith , an d conceivably , shuttin g dow n a n engin e unnecessarily

. Availabilit yof 787- 8 airplane s wit h th e GEnx-l B engine s wil l reduc e fue l bur n an d henc e reduc e emission s ofcarbo n dioxide , reduc e globa l emission s of NOx , an d reduc e operatin g cost s ofairlines

.

Reques t fo rWaive ro fPublicatio n Th e petitione rrequest s tha t thi s petitio n fo rexemptio n no t b e delaye d b yth e publi cprocess , whic h Include s publicatio n ofth e subjec t petition , du e t o th e fac t tha t thi s exemptio n wil l no t se t a precedent

. Boein g believe s goo d caus e exist s t o waiv e th e publicatio n an d commen t requirement s of§11.85 , §11.87 , an d §11.89

. Th e 787- 8 petitio n i s bein g provide d i n a timel ymanner ; however , du e t o th e schedule d deliveryofth e firs t 787- 8 i n 2011 , a dela yI n processin g of th e Exemptio n coul d dela yth e entry Int o service

.Enclosur e t o BDCO-10-0541 6 Pag e 6 o f6
H

. Privilege s o fthi s Exemptio n Outsid e th e Unite d State s Pe r§11.81(h) , Boein g request s tha t th e privilege s ofthi s Exemptio n b e extende d outsid e th e Unite d States

. Thi s extensio n o fprivilege s i s necessaryfo roperation s base d withi n foreig n countrie s havin g bilatera l agreement s wit h th e Unite d State s acceptin g FA A1 4 CF R Par

t 2 5 a s thei rairworthines s standard s fo rtranspor t categoryaircraft

. Th e 787- 8 I s Intende d fo rth e globa l marke t plac e wit h a launc h custome rbase d I n a countryutilizin g th e Unite d State s airworthines s standards

. I

. Conclusio n Th e requeste d time-limite d exemptio n wil l allo wth e Boein g Mode l 787- 8 relie f fro m th e requiremen t of§25.1309(c ) fo ra n unambiguou s an d timel yindicatio n t o th e fligh t cre wo f gros s fue l contamination

. Th e relie fsough t I s limite d t o thos e 787- 8 aircraf t complete d prio rt o th e productio n Incorporatio n o fth e complian t message . Th e productio n incorporatio n o f th e complian t messag e wil l b e accomplishe d b yJun e 30 , 201 4 deliveryan d al l subsequen t 787- 8 airplanes

. Th e Boein g Servic e Bulleti n wil l recommen d tha t al l 787- 8 airplane s delivere d unde rthi s exemptio n b e retrofitte d b yDecembe r31 , 2018

. A s discusse d above , passenge ran d cre wsafet ywil l no t b e appreciabl yaffecte d b ya gran t of exemptio n I n thi s case .