# Gulfetreain AaBNBRAI . DVIMAMIIC S COIWPAN V o r : Apri l 19 , 201 0 A&C-10-12 9 U.S . Departmen t o f Transportatio n Docke t Operation s Wes t Buildin g Groun d Floor , Roo m W12-14 0 120 0 Ne wJerse yAvenue , SE . Washington , D C 2059 0 Subject : Reques t fo rExemptio n fro m Sectio n 25.813(e ) o f Titl e 14 , Emergenc y

Exi t Acces s FA AProjec t No. : TC8700AT- T Attachment : Petitio n fo rExemptio n - Installatio n o f Interio rDoors , Mode l GV I Dea rSirs : I n accordanc e wit h 1 4 CF R Part 11 , Gulfstrea m Aerospac e Corporatio n request s consideratio n o f th e enclose d petitio n fo rexemption . Thi s petitio n i s bein g submitte d t o reliev e th e Gulfstrea m GV I mode l aircraf t fro m ful l complianc e wit h 1 4 CF R 25.813(e ) a t amendmen t 116 , Emergency exi t access , t o allo wfo rinstallatio n o f interio rdoor s i n certai n locations . I f yo u hav e an yquestion s o rnee d additiona l informatio n pleas e contac t Natali e Maul t a t (912 ) 965-546 6 (vi a emai l a t natalie.mault@gulfstream.com ) o rth e undersigned . Sincerely ,

Robert Glasscoc k Produc t Developmen t Tea m Lea d GV I Ainworthines s an d Certificatio n Gulfstrea m Aerospac e Corporatio n P.O . Bo x2206 , M/SR-0 3 Savannah , G A31402-220 6 robert.glasscock@gulfstream.co m (912)965-681 7 cc : N . Berryman , ACE-102 A(vi a email ) P . Hatton , EAS A(vi a email ) M . Gordon , ANM-11 3 (vi a email )

P.O . Bo x220 6 • Savannah , G A 31402-220 6 US A• Telephon e (912 ) 965-300 0 • gulfstream.co mPetitio n fo rPermanen t Exemptio n Gulfstrea m Aerospac e Corporatio n Installatio n o f Interio rDoor s

Mode l GV I Relie f fro m sectio n 1 4 CF R Par t 25.813(e ) Amdt . 25-11 6 Gulfstrea m Aerospac e Corporatio n (Gulfstream ) o f Savannah , Georgi a ha s submitte d a n applicatio n t o th e FAA' s Atlant a Aircraf t Certificatio n Offic e fo rtyp e certificatio n o f a new , twin-engine , transpor t categoryaircraf t t o b e know n a s th e Gulfstrea m mode l GVI . FAAProjec t Numbe rTC8700AT- T ha s bee n assigne d t o thi s effort . Th e GV I cabi n interio rrelie s o n th e installatio n o f variou s door s t o provid e certai n amenitie s an d configuratio n option s tha t hav e becom e th e standar d fo rExecutiv e Clas s aircraft . 1 4 CF R 25.813(e) , Amendmen t 25-11 6 - State s i n part tha t n o doo rma yb e installe d betwee n an y passenge rsea t tha t i s occupiabl e fo rtak e off an d landin g an d an ypassenge remergenc yexit , suc h tha t th e doo rcrosse s an yegres s pat h (includin g aisles , crossaisle s an d passageways). Th e GV I desig n incorporate s tw o door s betwee n th e passenge rseatin g area s an d th e mai n entry door . Se e Figur e 1 , Acousti can d Fonward Vestibul e Doo rArrangement . On e doo rwil l b e a n acousti c doo rprovide d betwee n th e fon/vard vestibul e an d th e mai n entrydoor . It s purpos e i s t o maintai n a n acceptabl e acousti cleve l i n th e passenge rcabi n an d pilo t compartmen t an d wil l b e standard equipment . Th e secon d doo rwil l b e a fon/vard vestibul e doo ran d i s offere d o n certai n interio r configurations . A n exampl e o f on e suc h configuratio n i s depicte d below . It s purpos e i s t o provide : 1 ) Isolatio n o f th e cre wres t facilitie s i n accordanc e wit h guidanc e pe rA C 121-31 ; 2 ) Separatio n betwee n passenge ran d cre warea s includin g th e galley , cre wrest , an d cockpit .



### Fw dVestibul e Doo r

Cre w Res t

Are aSea t

Acousti c Doo r 

### Figur e 1 - Acousti c an d Forwar d Vestibul e Doo rArrangemen tI n accordance wit h th e provision s of 1 4 CF R 11.81 , Gulfstrea m requests a n exemptio n t o 1 4 CF R

25.813(e ) fo rinstallation s o f thes e cabi n interio rdoors . Thi s wil l allow th e GV I aircraf t t o provid e a safe , quie t operatin g environmen t fo rth e crew an d passengers , an d meet th e requirements fo rcre w rest areas . Gulfstrea m propose s tha t specifi c desig n features , combine d wit h th e uniqu e configuratio n o f th e GVI , wil l provid e a n overal l leve l o f safet ybeyon d that intende d whe n th e FA Apromulgate d Amendmen t 25-116 . Base d o n thes e feature s Gulfstrea m propose s that thi s exemptio n b e applicabl e t o bot h privat e us e aircraf t (1 4 CF R par

t 91 ) an d thos e use d fo rhir e (1 4 CF R par

t 135) . Th e informatio n provide d herei n wil l outlin e thi s rationale . Supportiv e informatio n A t Amendmen t 25-1 , 1 4 CF R 25.813(e ) wa s revise d t o restric t installatio n of door

s betwee n passenge rcompartments . Thi s di d no t restric t th e installatio n of door

s fonwar d o raf t o f passenge r compartments . As suc h i t continue d t o b e commo n practic e fo rbusines s clas s aircraf t t o instal l door

s whic h isolat e th e passenge rseatin g area s fro m crew wor k areas . Thes e door

s lowe rnois e level s i n th e passenge rcabi n an d creat e effective wor k environments . O n Octobe r27 , 2004 , Amendments 25 - 11 6 an d 121-306 , title d "Miscellaneou s Cabi n Safet yChanges, " were publishe d i n th e Federa l Register . Thi s revise d 1 4 CF R 25.813(e ) t o restric t th e installatio n o f an yinterio rdoo rbetwee n a passenge rsea

t an d an yemergenc

yexit , effectivel yrestrictin g th e us e of al l interio rdoors . I n addition , th e FA Arevise d 1 4 CF R 121.310(f)(6) , t o prohibi t thes e door s i n airplane s manufacture d afte r Novembe r27 , 2006 , an d operate d unde r1 4 CF R par t 121 . However , a

t that tim e th e FA

Achos e no

t t o amen d 1 4 CF R par

t 13 5 o r1 4 CF R par

t 91 . As a result , aircraf

t certifie d prio rt o Amendmen t 25 - 116 , an d operatin g unde rothe rtha n 1 4 CF R par t 121 , ar e permitte d t o incorporat e thes e type s of doo rinstallations . Whe n Amendmen t 25-11 6 was issued , th e FA Anote d that thi s chang e was incorporate d du e t o concern s ove rpassengers ' abilit yt o 1 ) recogniz e that a n exi t exist s beyon d a n interio rdoo rforwar d o r af t o f th e passenge rcompartment ; an d 2 ) reac h th e exi t beyon d th e doo ri n th e even t o f failure of th e interio rdoo rt o open . Fo rth e GV I aircraft , Gulfstrea m believe s that i t i s possibl e t o provid e a leve l of safet yconsisten t wit h th e inten t of th e 1 4 CF R Par t 2 5 regulation s whil e allowin g fo rinstallatio n o f certai n interio rdoors . Thi s wil l b e accomplishe d b yincorporatin g specifi c desig n feature s that provid e a n acceptabl e leve l of safety . Thes e feature s wil l ensure th e desig n wil l not diminis h a passengers ' abilit yt o 1 ) effectivel y identif yth e exi t an d 2 ) egres s th e aircraft . Factor s supportin g th e Petitio n Th e followin g desig n feature s of th e GV I interio rdoor s an d passenge rcabi n wil l ensur e that th e passenger' s abilit

yt o effectivel yidentif

yth e exi t i s not diminished : • Th e door

s wil l b e designe d t o automaticall yope n (stow) base d o n th e airplan e bein g configure d fo rlandin g an d wil l remai n ope n unti l th e airplan e has returne d t o a n airborn e fligh t configuration . Th e installatio n o

f th e interio rdoors wil l therefore not adversel yaffec t passenge rrecognitio n o f th e Mai n Entr yDoo r(MED) . • Th e door

s wil l onl yb e installe d fonA/ar d of th e passenge rseatin g are a an d betwee n passenge r seat s an d th e MED . Th e ME D i s th e onl ydoo ravailabl e t o ente rth e aircraf t an d its locatio n i s inherentl yestablishe d fo ral l passenger s upo n boarding .• Emergenc yexi t locato ran d markin g sign s an d emergenc ylightin g i n accordanc e wit h 1 4 CF R

25.81 1 an d 25.81 2 wil l b e provided . • Th e ove rwin g emergenc yexit s ar e optimall ylocate d i n th e passenge rcompartment , i n clea ran d obviou s view , an d ar e i n a n are a o f hig h passenge rdensity . Thes e exit s wil l als o b e indicate d vi a locato rsign s an d markers , a s wel l a s emergenc yescap e pat h lighting . Thi s heightene d passenge rawarenes s an d eas e o f identificatio n wil l increas e th e likelihoo d o f passenger s utilizin g th e ove rwin g exit s provide d i n th e cabi n versu s defaultin g t o th e entrydoor . Referenc e Figur e 2 , GV I Emergenc yEgres s Routes . Th e followin g desig n feature s o f th e GV I interio rdoor s an d passenge rcabi n wil l ensur e tha t th e passenger' s abilit yt o effectivel yegres s th e aircraf t i s no t diminishe d b yensurin g tha t th e door s wil l b e ope n fo rtaxi , takeof f an d landing , withou t requirin g passenge ro rcre waction . • Th e door s wil l b e designe d t o automaticall yope n (stow ) whe n th e airplan e ha s bee n configure d fo rlandin g (gea rdow n o rflap s down) . • Th e operatio n o f th e doo rt o th e close d (deployed ) positio n wil l requir e manua l activation . Th e door s wil l b e designe d s o tha t the yca n onl yb e close d (deployed ) whe n th e gea ran d flap s ar e full yretracte d (airborn e configuration) , o rfo rgroun d maintenanc e activity . • Th e door s wil l b e designe d s o tha t fo ran yfailur e o f th e closing/latchin g mechanism , th e door s wil l defaul t t o th e ope n (stowed ) position . • I n accordance wit h Gulfstream' s approac h t o complianc e wit h 1 4 CF R 25.1309 , th e failur e t o egres s throug h an yindividua l emergenc yexi t i s classifie d a s Major . Gulfstrea m wil l demonstrat e tha t th e probabilit yo f failur e t o egres s throug h th e Mai n EntryDoo r(MED) , includin g th e probabilit yo f failur e o f bot h interio rdoors , wil l mee t th e criteri a fo ra failur e scenari o classifie d a s Major . Thi s wil l includ e conductin g a quantitativ e analysi s tha t show s th e probabilit yo f thi s scenari o t o b e les s tha n 10' ^ pe rfligh t hour . Thi s hazar d criticalit yi s base d o n 1 4 CF R 25.783(b)(2) . • Th e door s wil l hav e a hold-ope n featur e tha t wil l b e show n t o reac t al l emergenc ylandin g load s specifie d unde r1 4 CF R 25.561(b) . • Th e door s wil l b e placarde d t o b e ope n an d latche d fo rtaxi , takeoff , an d landin g (TT&L) . Manua l operatio n t o th e ope n (stowed ) positio n i s th e primarymean s b ywhic h th e door s shoul d b e ope n an d stowe d fo rTT&L . Th e automati c opening featur e wil l ensur e clea regres s path s i n th e even t tha t manua l operatio n ha s no t occurred . • A n Ambe rCA S messag e wil l alert th e pilot s i f a n interio rdoo ri s no t i n th e properl yope n (stowed ) positio n fo rTT&L . • Wit h th e door s i n th e ope n (stowed ) position , th e critica l fonA/ar d emergenc ylandin g load s wil l no t caus e eithe rdoo rt o deplo yan d bloc k acces s t o th e mai n entrydoor . • Th e ove rwin g emergenc yexit s hav e bee n designe d s o tha t the yca n al l b e deploye d a t th e sam e tim e t o provid e multiple , redundan t egres s path s fo rescap e fro m th e passenge rcompartment . Eac h o f th e fou rove rwin g emergenc yexit s requir e singl e fil e egres s an d hav e bee n size d t o provid e substantia l egres s area . Thi s reduce s th e problem s cause d b ypassenge rpani can d congestio n typica l i n single , large rexits . Smooth , effectiv e egres s o f passenger s throug h th e existin g ove rwin g exit s wil l als o increas e th e likelihoo d o f passenger s utilizin g th e ove rwin g exit s a s oppose d t o seekin g alternat e escap e route s furthe rawa y(MED) . Referenc e Figur e 2 , GV I Emergenc yEgres s Routes .• Bot h door s wil l b e designe d t o b e frangibl e fro m eithe rsid e o f th e door . I n cas e of a n emergency , thi s desig n wil l allow a 5t h percentil e femal e t o creat e a n aperture larg e enoug h t o allow fo ra 95t h percentil e mal e t o escape . Additiona l GV I Desig n Considerations :

• Th e mai n entr

ydoo ri s als o th e fligh t crew emergenc yexit . I n th e even t of a n emergenc y evacuation , a traine d crewmembe rwil l b e responsibl e t o ensure egres s i s maintaine d throug h thi s passagewa

yt o th e MED . • Gulfstrea m wil l demonstrat e that th e ove rwin g exi t pai rwil l b e equivalen t t o th e siz e an d numbe r o f exit s require d b

y1 4 CF R 25.807(g) . Th e GV I aircraf t wil l compl ywit h 1 4 CF R 25.807(g ) fo r require d numbe rof emergenc yexit s throug h th e ove rwin g exits . Gulfstrea m intend s t o demonstrat e that th e ME D i s a n emergenc yexi t i n exces s of th e minimu m require d o n th e lef t han d sid e of th e aircraft . • Throug h a n Equivalen t Leve l o f Safet yfindin g t o 1 4 CF R 25.813(c)(2) , Gulfstrea m wil l addres s FA A Polic ynumbe rANM-115-08-02 , an d intend s t o demonstrat e that th e GV I exi t pai rwil l provid e equivalen t egres s capabilit yt o that o

f a require d Typ e III . • Compliance wit h 1 4 CF R 25.807(i ) fo rditchin g wil l b e show n throug h th e us e o f th e over-win g emergenc yexit s as require d b

y1 4 CF R 25.807(g) . Th e fonwar d entr ydoo rwil l no

t b e utilize d unde rthi s scenari o fo remergenc yevacuatio n an d applicabl e placard s wil l b e provided . Th e Airplan e Fligh t Manua l wil l defin e prope rprocedure s fo rexitin g th e aircraf t i n thes e conditions . • Manyof th e passenger s typicall yutilizin g Executive Clas s aircraf t are frequen t passenger s wh o ar e familia rwit h th e operatio n o f th e interio rfeature s an d location s o f emergenc

yexits .

PassengerEmergenc

yExit Cre w Emergenc

yExi t 

### Figur e 2 - GV I Emergenc yEgres s Route sEffec t o f th e Exemptio n o n Safet y

Acceptance o

f th e propose d GV I desig n wil l ensure that a leve l o f safet yconsisten t wit h th e inten t of th e regulatio n has bee n provided . Th e desig n o f th e propose d interio rdoor s wil l ensur

e th e sam e leve l o f safet yfo rcabi n egres s a

s i s require d fo ran yemergenc yexi t an d wil l provid e a clea regres s path . Thi s combine d wit h othe rcharacteristics of th e GV I suc h as redundanc yof emergenc

yexits , larg e are a ove rwin g exit s an d optima l locatio n of emergenc yexits , wil l provid e a leve l of safet y exceedin g that currentl yprescribe d unde r1 4 CF R par t 25 . Althoug h th e curren t operationa l requirements unde rParts 9 1 an d 13 5 fo rthi s typ e of aircraf

t hav e no t bee n amende d t o correspon d t o th e Par t 2 5 restriction , Gulfstrea m acknowledge s that th e Par t 2 5 chang e i s a n importan t enhancemen t t o th e leve l of safet yoffere d b

ynewl ymanufacture d aircraft . Th e desig n criteri a propose d b yGulfstrea m fo rth e GV I raise s th e curren t leve l of safet yt o that envisione d b

yAmendmen t 25-11 6 t o par t 25 . Issu e o f Publi c Interes t Gulfstrea m Aerospac e Corporatio n designs , develops , manufactures , markets an d sen/ice s th e world' s mos

t technologicall yadvance d busines s je t aircraf t t o a n internationa l market . Gulfstream' s leadershi p positio n i n th e globa l busines s je t market i s du e t o th e effort s of its nearl yeigh t thousan d employee s i n th e manufacturin g plants , completio n centers , an d servic e center s acros s Nort h America . Th e corporatio n utilize s numerou s products , suc h as avionics an d environmenta l contro l systems , fro m score s of supplier s locate d throug h ou t th e Unite d States . Gulfstrea m compete s fo r ne w busines s al l ove rth e world . Althoug h th e curren t worl d econom yhas slowe d i n compariso n t o previou s years , th e corporat e aircraf t market i s expecte d t o grow . Thi s exemptio n wil l directl yimpac t th e cabi n an d fligh t dec k

acoustics an d th e effectivenes s of fligh t crewrest facilitydesign , thereby havin g a direc

t effec t o n GV I sales . Th e abilit yt o provid e additiona l acousti c barrie rfro m externa l nois e fo rth e fligh t dec k

an d cabi n are bein g requeste d b yprospective aircraf

t operator s wh o compar

e th e GV I wit h products of Europea n an d othe rforeig n aircraf t manufacturers . Th e inabilit yt o provid e suc h feature s wil l ultimatel ycaus e a reductio n i n perspective sales . Th e manufacture , completion , an d suppor

t of Gulfstrea m aircraf

t woul d ai d i n th e stabilizatio n of th e jo b market a s wel l as th e growt h o f th e America n economy , whic h i s i n th e interes t of th e public . Since customer

s desire t o hav

e thes e interio rdoors , the yma yopt fo raircraf

t designe d t o a n earlie r certificatio n basis , i n lie u of th e GVI . Thi s wil l restric t advancements i n safet

yintroduce d b

y Gulfstrea m wit h th e GVI , not onl yi n th e area s o f cabi n safety , bu t throughou t th e airplane . Thi s i s counterproductive t o bot h Gulfstrea m an d th e FAA' s goa l of continuou s improvemen t i n overal l aircraf t safety . Th e advancemen t o f aircraf t safet yi s i n th e interes t o

f th e public .Operatio n Outsid e o f th e Unite d State s

Th e Europea n Aviatio n Safet yAdministratio n (EASA

) Certificatio n Standar

d (CS ) 25.81 3 regulatio n i s not currentl yharmonize d wit h 1 4 CF R 25.81 3 an d doe s not restric t thes e type s o f doo rinstallations . Regardles s o

f EAS Arequirements , pe r1 4 CF R 11.81(h ) Gulfstrea m requests consideratio n b e give n t o extendin g thi s exemptio n fo roperatio n outsid e of th e Unite d States . Gulfstrea m aircraf t ar e routinel yregistere d an d operate d outsid e of th e Unite d State s an d projection s ar e th e sam e fo rth e Mode l GVI . Grantin g thi s extensio n of privilege s wil l allow fo roperation s base d withi n foreig n countries , includin g E U membe rcountries , havin g bilatera l agreements wit h th e Unite d State s acceptin g FA

A1 4 CF R par

t 2 5 as thei rairworthines s standard s fo rtranspor t categor yaircraft . Gulfstrea m believe s that limitin g thi s exemptio n t o us e withi n th e U.S . woul d pu t unfai rrestriction s o n th e marketabilit

yof thi s aircraft . Conclusio n Gulfstrea m believe s that th e abov e arguments favo ra n exemptio n fro m 1 4 CF R 25.813(e ) that woul d allowfo rinstallatio n of certai n interio rdoor s o n th e GV I aircraft . I n addition , Gulfstrea m believe s that a n exemptio n i s i n th e publi c interes t an d wil l provid e a leve l o f passenge rsafet

yconsisten t wit h th e curren t Par

t 2 5 regulations .