01/14/201 0 14:1 6 816329410 & SA D PAG E 02/0 2

^ •[••'••••^:"'^TAT:n M U.S. Departmen t o f Transportatio n Federa l Aviatio n Administratio n Smal l Airplan e Directorat e 90 1 Locus t Kansa s City , M O 6410 6

JafttiaJt y 14 , 201 0 . Mr . Christophe r

Mitchel l Director , Airworthines s Cimi s Desig n Corporatio n 451 5 Taylo r

Circl e Duluth,M N 5581 1 Dea r Mr . Mitchell : W e ar e enclosin g agrant

o f you r petitio n submitte do n Septembe r 14 , 2009 , requestin g exemptio n fromth e requirement s o f § 23.1419(a ) o f

Titl e 1 4 o f

th e Cod e o f

Federa l Regulations , Th e exemptio n permit s Cirru s t o allo w aspee dabov e 6 1 knot s in th e landin g configuratio n (Vso ) i n icin g condition s fo r th e model SR22T , I f

yo u hav e an y questions , pleas e contac t

Mr . Pau l Pellican o a

t th e abov e addres s o r

cal l hi mo n 770-703-6064 . Sincerely ,

Kir Manager , SiV»alM.irplan

e Directorat e Aircraf t Certificatio n Servic e Enclosur e01/14/201 0 13:1 0 816329410 6 SA D PAG E 02/0 4

Exemptio n No . 999 3 UNITE D STATE S O FAMERIC A DEPARTMEN T O FTRANSPORTATIO N FEDERA L AVIATIO N ADMINISTRATIO N KANSA S CITY , M O 6410 6

In th e matte r

o f th e petitio n o f CIRRU S DESIG N CORPORATIO N (CIRRU S DESIGN ) fo r a n exemptio n from § 23.1419(a ) o f Title 14 , Cod e o f Federa l Regulation s Regulator y Docke t No . rAA-2009-117 1

GRAN T O FEXEMPTIO N B y lette r date dSeptembe r

14,2009 , Mr . Christophe r Mitchell , Director , Airworthines s an dEngineerin g Services , Cirru s Desig n Corporatio n (Cirru s Design) , 451 5 Taylo r Circle , Duluth , Mirmesota , 5581 1 petitione dth e Federa l Aviatio n Administratio n (FAA ) o n behal f o f Cirru s Desig n for

a n exemptio n from § 23.1419(a ) o f Titl e 14 , Cod e o f

Federa l Regulation s (1 4 CFR) . Th e propose dexemption , i f granted , woul dallo w astal l spee dabove 6 1 knot s i n th e landin g configuratio n (Vgo) , i n icin g conditions , Vs o mean s th e stallin g speedo r th e minimu mstead y flight

spee dobtaine di n aspecifi c configuration , a s define di n 1 4 CF Rpart 1 , § 1.2 . Th e petitione r

request s relie f

fro mth e followin g regulation : Sectio n 23.1419(a ) prescribe s tha t airplan e performance , controllability , maneuverability , an dstabilit y mus t no t b e les s tha n tha t

require di n par t

23 , subpart

B , i n th e icin g condition s define di n par t 25 , Appendi x C . Sectio n 23.4 9 i s include di n subpart B performance , an d§ 23.49(c ) require s Vs o t o b e 6 1 knot s o r les s fo r th e Cirru s Desig n mode l SR22T . Th e petitione r

support s it s reques t

wit h th e followin g information : Th e petitione r

state s tha t

compensatin g feature s i n support o f th e requeste dexemptio n are liste di n FA A Advisor y Circular (AC ) 23.1419-2D, paragrap h 13.a.(l)(c) . Som e o f th e compensatin g feature s includ e th e following :01/14/201 0 13:1 0 816329410 6 SA D PAG E 03/0 4

1 . Th e airplan e with n o ic e accretion s meet s th e 6 1 knot stal l spee drequiremen t

o f § 23.49(c) . 2 . Th e airplan e with critica l ic e accretion s (a s define di n paragrap h 13 b o f A C 23.1419

- 2D ) complie s with th e stal l warnin g requiremen t o f § 23,207 . 3 . Th e Airplane Fligli t

Manua l performanc e dat ai n icin g condition s reflect s th e highe r stal l an doperatin g speeds . 4 . Th e airplan e wit h critica l ic e accretion s ha s acceptabl e stal l characteristic s an di s safel y controllabl e with norma l pilotin g skills . Th e petitione r

state s that

grantin g th e exemptio n woul dbenefi t th e publi c b y increasin g th e safet y o f th e airplane , siiic e th e model SR22 T i s primaril y use dfor cross-country trave l an dha s ahig h probabilit y o f encounterin g inclemen t

weather , includin g icin g conditions . Grantin g th e exemptio n woul dallo w th e airplan e t o b e certifie dfor flight int o know n icin g wit h asyste mthat ha s increase dredundanc y an dcapabilit y compare d t o th e syste mcuiTently certified . Th e utilit y o f th e airplan e i n icin g woul db e reduce di f th e exemptio n wer e not

grante dbecaus e th e payloa dwoul db e reduce db y approximatel y 30 2 pounds , o r

abou t 3 3 percent . Th e petitione r state s safety i s not

adversel y affecte d becaus e th e mode l SR22 T ha s al l th e compensatin g feature s liste di n th e AC . Th e Cirru s SR22 T i s aderivativ e o f th e Cimi s SR22 . A similar exemptio n reques t

wa s grante dfo r th e Cirru s SR2 2 (Exemptio n No . 9849 ) in 2009 . A summar y o f th e SR2 2 exemptio n petitio n wa s publishe di n th e FEDERA L REGISTE Ro n Februar y 17 , 200 9 (7 4 F R7534) . Also , th e Diamon dDA-4 2 wa s grante dasimilar exemptio n (Exemptio n No . 9623 ) in 2006 , N o comment s wer e receive dfo r eithe r exemptio n request . A n Equivalen t Leve l o f Safety (No . ACE-02-10 ) wa s grante dt o th e Extr a40 0 i n 200 2 prio r t o th e FA A positio n that

a n exemption , no t

an ELOS , i s appropriate . Sinc e th e exemptio n reques t o n th e model SR22 T i s th e sam e a s previou s requests , an dth e mode l SR22 T incorporate s th e compensatin g feature s liste di n Advisor y Circular 23.1410-2D , an dgrantin g th e SR22 T petitio n di dno t

se t aprecedent , w e determine dtha t w e shoul dno t

dela y actio n o n i t

b y publishin g i t

for publi c comment . Therefore , w e waive dth e requiremen t for FEDERA L REGISTE Rpublication . Th e FAA' s analysi s i s a s follows : Th e FA A finds that

th e mode l SR22T , a s modifie db y th e typ e desig n chang e define db y FA A projec t

AT6893CH-A , incorporate s th e compensatin g feature s liste di n Advisory Circular 23,1419-2D , paragrap h 13.a.(l)(c) .01/14/201 0 13:1 0 816329410 6 SAD PAG E 04/0 4



### Th e FAA' s Decision I n consideratio n o

f the foregoing , I findtha

t agran t o f exemption i s i n th e publi c interest . Therefore , pursuan t t o the authorit

y containedi

n 4 9 U.S.C . § § 4011 3 an

d44701 , delegatedto m

e by th e Admimstrator , Cirru s Desig n Corporation i s grante da

n exemption from1 4 CF

R§ 23.1419(a

) t o the exten

t necessar y t o allow Cirru s Desig n to certificat e th e ic e protectio n syste

mo n the model SR22T , subject t o the condition s an

dlimitation s liste dbelow . Condition s an dLimitation s None . Issuedi n Kansa s City , MO o

n Januar y 13 , 2010 .

Manager , Smal l Airplan e Directorat e Aircraft Certificatio n Servic e