# 0.

. Ronal d J

. Hinderberge rHi e Boein g Compan y Lead Administrato rP.O

. Bo x370 7 M C 67-L R Delegate d Compliance Org

. Seattle , W A98124-220 7 Commercia l Airplane s


### DE C 

### 1 6 201 0 BDCO-10-05 3 8 4

U.S

. Departmen t

o f Transportatio n Docke t Managemen t

Syste m 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 nfro mTitl e 1 4 Cod e o f Federal Regulation s sectio n25.1309(c ) an d 25.1305(c)(6 ) a

t Amendmen t

25.12 0 with Respec t t o Cre w Annunciatio no f th e Statu s o f Fue l Syste mComponent s Model : 747-8F , 747- 8
Th e Boein g Compan y respectfull y submit s thi s petitio nfo r exemptio nfrom specifi c aspect s o f

Titl e 1 4 Cod e o f

Federal Regulation s Sectio n25.1309(c ) an d 25.1305(c)(6 ) a

t Amendmen t

25.12 0 for

alimite dnumbe r

o f General Electri c (GE ) GEnx-2 B powere d747-8 Fan d747- 8 airplane s a s describe dinth e summary below

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

th e petitio nin accordanc 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 Federal Registe r

inaccordanc 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 CF RAffected : Sectio n25.1309(c ) an d25.1305(c)(6)

. Descriptio no f

Relie f Bein g Sought : Boein g i s requestin g relie f from frill complianc e t o Sectio n25.1309(c ) an d 25.1305(c)(6 ) for

th e Genera l Electri c (GE ) GEnx-2 B powere d747-8 Fan d747- 8 airplane s for

th e unambiguou s an dtimel y indicatio nt o th e flight cre w t o aler

t the mo f a nanticipate dfriel syste mcontamination

. If granted , thi s exemptio nwil l allo w sufficient

tim e for Boein g to develop , certif y an dincorporat e int o productio nane w alertin g syste mthi s i s fully complian t withSectio n25.1309(c ) an d25.1305(c)(6)

. Th e exemptio nwoul dallo w relie f fromth e requiremen t

i n Sectio n25.1309(c ) an d25.1305(c)(6 ) to provid e indicatio nto th e cre w o f anticipate dfriel syste mcontaminatio nfor Genera l Electri c GEnx-2 B powere d 747-8 Fan d747- 8 airplane s delivere du p to Jun e 30 , 201 4 an dDecembe r 31 , 201 8 for retrofi t incorporation

.( ^ Pag e 2 Docke t Managemen t

Syste m BDCO-10-05 3 8 4
Very trul y yours ,

> /Christin e Thompso n "^Lea dProjec t Administrator , Developmen t Project s (425 ) 266-6572 , M C 03-5 6 FAX : (425)294-934 0
Enclosure : Petitio nfor Exemptio nfrom1 4 CFR25.1309(c ) an d 25.1305(c)(6 ) a

t Amdt

. 25-12 0

c c Nam e Al i Bahrami Gary Oltma n Su e Lucie r Jo nRegimba l Henry Wildegan s Henk Prui s 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-102 S ANM-140 S ANM-140 S EAS A Pane l 0 EAS A Pane l 7Enclosur e t o BDCO-10-0538 4 Pag e 1 of 5
Petitio n fo rExemptio n fro m 1 4 CF R 25.1305(c)(6 ) an d 25.1309(c ) Amendmen t 25-12 0 fo r Genera l Electri cGEnx-2 B Powere d 747- 8 an d 747-8 F Airplan e Mino rIVIodels , FA A

Projec t Number s PS05-021 1 an d PS05-021 2 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 : Reaulatio n 1 4 CF R 25

. 1305(c)(6 )

1 4 CF R 25.1309(c ) A t

Amendmen t 12 0

12 0 Whic h Require s

(c ) Fo rturbin e engine-powere d airplanes

. I n additio n t o th e powerplan t instrument s require d b yparagrap h (a ) ofthi s section , th e followin g powerplan t instrument s ar e required : (6 ) A n indicato rfo rth e fue l straine ro rfilte rrequire d b y §25.99 7 t o indicat e th e occurrenc e o f contaminatio n of th e straine ro rfilte rbefor e i t reache s th e capacit y establishe d i n accordanc e wit h §25.997(d)

. (c ) Warnin g informatio n mus t b e provide d t o alert th e cre wt o unsaf e 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-10-0538 4 Pag e 2 of 5
Th e exten t o frelie fbein g sough t Regulatio n 1 4 CF R 25.1305(c)(6 ) an d 25.1309(c ) Amendmen t 12 0 Requires :

Fo rth e GEnx
2 B fue l syste m t o compl ywit h 1 4 CF R 25.1309(c) , a n unambiguou s an d timel y indicatio n t o th e fligh t cre w i s require d t o alert the m o f a n anticipate d fue l syste m contaminatio n tha t coul d clo g th e fue l system , o r coul d significantl y dela yth e indicatio n require d b y1 4 CF R 25.1305(c)(6 ) durin g gros s contaminatio n ofth e airplan e fue l system

. Th e purpos e o f 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 necessarybecause :

Th e 747- 8 an d 747-8 F / GEnx-2 B engine s wil l b e som e ofth e firs t Genera l Electri cengine s t o incorporate a metho d t o detec t gros s fue l syste m contamination

. Th e FAAonl yrecentl yprovide d guidanc e regardin g wha t i s neede d t o sho w complianc e t o §25.1305(c)(6 ) an d §25.1309(c) fo r indicatio n of gros s fue l contamination

. Therefore , i t woul d creat e a significan t burde n i f Boein g wer e no wrequire d t o incorporate thi s ne wgros s fue l syste m contaminatio n indication(s ) o n th e firs t productio n 747-8/-8 F airplanes

. Fo rth e 747-8/-8 F 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 multipl e 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 of anticipate d fue l syste m contaminatio n tha t coul d clo g th e fue l syste m ahea d o f th e engine fue l filter , o rtha t coul d significantl ydela yth e indicatio n require d b y §25.1305(c)(6 ) durin g gros s contaminatio n of th e airplan e fue l system

. Th e purpos e of 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 ro f 747-8 F an d 747- 8 airplane s t o allo wsufficien t tim e t o develop , validate , certif yan d incorporate int o productio n a ne wcomplian t gros s fue l syste m contaminatio n indication(s)

. Followin g incorporatio n of 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 rthi 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 Model s 747-8 F an d 747- 8 relie f fro m th e requiremen t of §25.1305(c)(6 ) an d 25.1309(c ) fo ra n unambiguou s an d timel yindicatio n t o th e fligh t cre wof gros s fue l syste m contamination

.Enclosur e t o BDCO-10-0538 4 Pag e 3 of5 Th e relie f sough t i s limite d t o thos e 747-8 F an d 747- 8 aircraf t complete d prio rt o th e productio n incorporatio n o f 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 y3 0 Jun e 2014

. Aservic e bulleti n wil l b e availabl e n o late r tha n 3 0 Jun e 201 4 suc h tha t al l 747-8 F an d 747- 8 airplane s delivere d unde rthi s exemptio n ca n orde rpart 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 y3 1 Decembe r2018

. Passenge ran d cre wsafet ywil l no t b e appreciabl y affecte d b ya gran t of exemptio n i n thi s case . Th e requeste d time-limite d exemptio n wil l allo wth e Boein g Model s 747-8 F an d 747- 8 relie f fro m th e requiremen t fo ra n unambiguou s an d timel y indicatio n t o th e fligh t cre wo f gros s fue l syste m contamination

.

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 ) an d §25.1305(c)(6 ) fo rindicatio n o fgros s fue l contamination

. Give n th e advance d stag e o f th e 747-8 F an d 747-8/GEnx-2 B program s relativ e t o gainin g basi camende d typ e desig n certification , Boein g i s requestin g thi s time-limite d exemptio n t o implemen t a robust , reliabl e desig n an d verificatio n ofth 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 o f thrust

. Th e FA Aha s foun d th e 747-8 F an d 747- 8 /GEnx-2 B desig n t o b e non-complian t t o §25

. 1309(c ) an d §25.1305(c)(6 ) fo rthi s issue

. Thi s FA Apositio n i s base d o n th e lac k o f a n unambiguou s an d timel yannunciatio n t o th e fligh t crew s o f gros s contaminatio n o f th e airplan e fue l supply

. Th e engin e fue l indicatio n syste m doe s no t currentl ydirectl yaddres s th e basi c proble m o fgros s fue l syste m contaminatio n indication

. Prio rt o th e expiratio n ofthi s time-limite 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

.Enclosur e t o BDCO-10-0538 4 Pag e 4 of5
Statemen t o fN o Advers e Affec t o n Safet y
Th e GEnx-2 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 o f th e GEnx-2 B engin e doe s no t limi t fue l flo wt o th e engin e 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-2 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 xengin e 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

. Servic e historystudie s conducte d showe d tha t th e fue l straine r/ 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 ofth e GEnx-2 B engine ) hav e ha d n o know n IFS D o rpowe rinterruptio n event s attribute d t o cloggin g o fcomponent s upstrea m o f th e mai n fue l filter

. 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 o fsoli 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 o f 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 it s 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 o f gros s fue l syste m contaminatio n tha t becam e applicabl e t o th e Mode l 747-8 F an d 747- 8 wel l afte rth e airplan e developmen t progra m complete d fir m configuration

. Conversely , i f th e requeste d relie fi s no t grante d th e additio n o f th e subjec t fligh t dec k indicatio n a t thi s lat e stag e ofth e airplan e developmen t progra m woul d lea d t o delay s i n th e deliverie s o f Model s 747-8 F an d 747- 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 y747-8 F an d 747- 8 customer s ar e overseas . Furthe rdeliverydelay s of th e 747-8 F an d 747- 8 ar e no t i n th e interes t of th e publi cdu e t o th e potentia l negativ e impac t t o expor t sales , th e balance-of-trade , th e gros s domesti cproduc t an d economi chealt h o f th e Unite d States

.

### Enclosure t o BDCO-10-0538 4 Pag e 5 o f5
I n addition , withou t adequat e tim e t o develo p a robust solution , nuisance fligh t dec k alert s in
service hav

e th e potentia l t o reduce operationa l safetywhe n fligh t crews ar e taske d t o respon d t o fals e indication s potentiall yresultin g i n unnecessar yfligh t diversions , landin g at airport s that theyar e not familia rwith , an d conceivably , shuttin g dow n a n engin e unnecessarily

. Availabilit yo f747-8 F an d 747- 8 airplane s wit h th e GEnx-2 B engine s wil l reduce fue l bur n an d hence reduce emission s o f carbo n dioxide , reduce globa l emission s o fNOx , an d reduce operatin g cost s o

f airlines

. Reques t fo rWaive ro fPublicatio n Th e petitione rrequests that thi s petitio n fo rexemptio n not be delaye d b yth e publi cprocess , whic h include s publicatio n o f th e subjec

t petition , du e t o th e fact that thi s exemptio n wil l not set a precedent

. Boein g believe s goo d caus e exist s t o waive th e publicatio n an d commen t requirements o

f §11.85 , §11.87 , an d §11.89

. Th e 747-8 F an d 747- 8 petitio n i s bein g provide d i n a timel ymanner ; however , du e t o th e schedule d deliver

yo fth e firs t 747-8 F bein g nea rth e secon d quarte ro fth e yea r2011 , a dela

y i n processin g o

fth e Exemptio n coul d dela yth e entr yint o service

. H

. Privilege s o f thi s Exemptio n Outsid e th e Unite d State s Pe r§11.8 1 (h) , Boein g requests that th e privilege s o fthi s Exemptio n b e extende d outsid e th e Unite d States

. Thi s extensio n o f privilege s i s necessar

yfo 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 as thei rainworthines s standard s fo rtranspor t categor yaircraft

. Th e 747-8 F an d 747- 8 ar e intende d fo rth e globa l market place wit h a launc h custome rbase d i n a countr yutilizin g th e Unite d State s ainA/orthiness standards

. I

. Conclusio n Th e requeste d time-limite d exemptio n wil l allowth e Boein g Model s 747-8 F an d 747- 8 relief fro m th e requiremen t o

f §25.1305(c)(6 ) an d §25.1309(c) fo ra n unambiguou s an d timel y indicatio n t o th e fligh t crewo f gros s fue l contamination

. Th e reliefsough t i s limite d t o thos e 747-8 F an d 747- 8 aircraft complete d prio rt o th e productio n incorporatio n o f th e complian t message . Th e productio n incorporatio n o fth e complian t messag e wil l b e accomplishe d b y3 0 Jun e 201 4 deliver

yan d al l subsequen t 747-8 F an d 747- 8 airplanes

. Th e Boein g Service Bulleti n wil l recommen d that al l 747-8 F an d 747- 8 airplane s delivere d unde rthi s exemptio n b e retrofitte d b y3 1 Decembe r2018

.