( ^ Ronal d J

. Hinderberge r Lea d Administrato r Regulator yAdministratio n Commercia l Airplane s Th e Boein g Compan y P.O

. Bo x370 7 M C 03-5 6 Seattle , W A98124-220 7 

### yTJj W .W \ RA-ll-0371 5

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 : Reques t for Amendmen t

t o FAA Exemptio n No
. 1026 7 Provisio n No
. 1 Model : 747-8F , 747- 8 Reference : PA A Exemptio n No
. 1026 7 (Regulatory Docke t No
. FAA-2010-1268) , issue do n May 19,2011
. y ^

Th e Boein g Compan y respectfull y request s a n amendmen t

t o provisio n # 1 o f

th e referenc e exemption
. Th e FA A decisio n include dth e followin g provisio n in grantin g th e exemption : ''''Fo r Mode l 747-8/8 Fairplane s grante dacertificat e o f airworthines s befor e Jun e 30 , 2014 , th e Airworthines s Limitation s sectio n o f th e Instruction s fo r ContinuedAirworthines s mus t includ e alimitatio n tha t require s operator s t o verif y contaminant s hav e no t

accumulate don th e fue l straine r locate dupstrea m o f th e engin e driven fue l pump . Th e procedure s mus t

b e accomplishe dafte r

th e firs t flish t followin g an v maintenanc e action s tha t resul t in personne l entr y int o th e cente r win s fuel tan k

an dbefor e th e nex t

flisht
. Th

e limitatio n mus t

als o requir e a n inspectio n o f

th e fue l coole doi l coole r i f th e fue l straine r

ha s bypasse dfue l r Th e curren t

provisio n onl y allow s for on e flight

cycl e befor e all engine s ar e require dt o b e inspecte dbefor e th e nex t flight
. Th e amendmen t

t o thi s provisio n i s requeste dt o allo w for

flight hours , instea do f

flight cycles , t o b e use dfor

th e physical inspectio n interva l o f th e fue l straine r an dt o limi t

th e physica l inspection s t o tw o engines
. Thi s amende dprovisio n woul db e me t b y thre e separat e inspections :

• Inspectio n o f

th e Engin e Indicatio n an dCre w Alertin g Syste m(EICAS ) an dCentra l Maintenanc e Compute r (CMC ) message s t o detec t an y bypas s o r impendin g bypas s a

t th e fue l strainer s afte

r th e firs t flight ;
• Physica l inspectio n o f th e engin e fiiel straine r

after 2 0 flight hour s for th e firs t engine ;^
. Pag e 2 Mr
. Brenema n RA-ll-0371 5

• Physica l inspectio n o f th e engin e fuel straine r

after 4 0 hour s for

th e secon dengine
. Th e tw o engine s selecte dwil l b e thos e determine db y analysi s t o b e fedprimaril y fromth e cente r

fue l tank
. N o inspectio n woul db e require dfo r th e othe r tw o engines
. Th e rational e for

requestin g this amendmen t i s t o ensur e that

th e engine s ar e operate do n cente r

tank fue l for sufficient tim e for an y maintenanc e relate d contaminant s t o b e capture db y th e engin e fue l strainers , whil e allowin g adherenc e t o th e bes t

practice s o f

avoidin g commo n multipl e engin e maintenance
. Th e tw o engin e samplin g i s a n effectiv e commo n mod e threat mitigatio n strategy . Additionally , Boein g i s committin g t o similar inspection s followin g inboar dmai n fuel tank entry b y maintenanc e personnel
.

Very trul y yours .

Cbnstin e M
. Thompso n Lea dProgra mAdministrator , Developmen t Project s (425 ) 266-6572 , M C 03-5 6 FAX : (425)294-934 0
c c Nam e Al i Bahram i Gary Oltma n Su e Lucie r Jo n Regimba l Henr y 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 7