03/29/201 0 14:2 8 816329410 6 SA D PAG E 02/0 5

^ U.S . Departmen t o f Transportatio n Federa l Aviatio n Administratio n 

### DFPTOFIBAHSFORW K Smal l Airplan e Directorat e 90 1 Locus t Kansa s City , M O 6* 1 O

S 

### 3 0 fAV i t ' 3 iB B

Mr . Rober

t Kremtiitze r Chief , Offic e o f

Airworthines s Diamon daircraf

t Industries , Gmb H N.A . Otto-Strass e 5 A-270 0 Wiene r

Neustad t Austri a Dea r Mr . Kremnitzer ; W e ar e enclosin g agran t

o f you r petitio n submitte do n January 29,2010 , requestin g a n exemptio n fro

mth e requirement s o f

1 4 CF Rpar t 23 , § § 23.1419(a) . Th e exemptio n allow s Diamon dt o obtai n atyp e certificate o n th e Diamon dMode l D A 4 2 M N G airplane s wit h a landin g configuratio n stal l spee din icin g condition s tha t exceed s 6 1 knots . .I

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

Mr . Pau l Pcllican o a

t th e abov e addres s o r

cal l hi mo n 404-474

- 5558 . Sincerely ,

, ^ Ki mSmit h Manager , Smal l Airplan e Directorat e Aircraf t Certificatio n Servic e Enclosure03/29/201 0 14:2 8 816329410 6 SA D PAG E 03/0 5

Exemptio n No , 1003 7 UNITE D STATE S O F AMERIC A DEPARTMEN T O F TRANSPORTATIO N FEDERA L AVIATIO N ADMINISTRATIO N KANSA S CITY , M O 6410( 5

I n th e matte r

o f th e petitio n o f DIAMON D AIRCRAF T INDUSTRIE S GmbH , (DIAMON D AIRCRAFT ) for an exemptio n fro

m§ 23.1419(a ) ofTitlel4 , Codeo f Federal Regulation s Regulator y Docke t No . FAA-2010-009 1

GRAN T O F EXEMPTIO N B y lette r date dJanuary 29 , 2010 , Mr , Rober t Kreminitzer , Chief

, Offic e o f Airworthiness , Diamon dAircraf t Industrie s GmbH , (Diamon dAircraft) , N.A , Otto-Strass e 5 , A-270 0 Weiner-Neustadt , Austria , petitione dth e Federa l Aviatio n Administratio n (FAA ) o n behal f o f Diamon dAircraf

t for an exemptio n fro

m§ 23.1419(a ) o f

Title 14 , Cod e o f

Federal Regulation s (1 4 CFR) . Th e propose dexemption , i f granted , woul dallo w astal l spee dabov e 6 1 knot s i n th e landin g configuratio n (Vgo) , i n icin g condition s for th e mode l DA-4 2 M-NO . Vs o mean s th e stallin g spee do r th e minimu mstead y flight spee dobtaine di n aspecifi c configuration , a s define di n 1 4 CFRpart 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 , andstability mus t no t b e les s tha n tlia

t require di n part

23 , subpar

t B , i n th e icin g condition s define di n part 25 , Appesndi

x C . Sectio n 23.4 9 i s include di n subpar t B peirformance , an d§ 23.49(c)(2 ) require s Vgo t o b e 6 1 loiot s o r les s fo r th e Diamon dAircraf

t mode l DA-4 2 M-NG , Th e petitione r

support s it s reques t

with th e followin g information : Th e petitione r

state s that

compensatin g fcahire s i n suppor t o f th e requeste dexemptio n are liste di n FA A Advisory Circula r (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 :03/29/201 0 14:2 8 816329410 6 SA D PAG E 04/9 5

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 . Simila

r t o th e mode l DA-4 2 NG , th e mode l DA-4 2 M-N G forwar dcente r o f gravit y limi t

was revise dto compl y wit

h thi s requirement . 3 . Th e Airplan e Fligh t

Manua l perfonnanc 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 andi s safel y controllabl e wit h norma l pilotin g skills . Th e petitione r

state s grantin g th e exemptio n woul dbenefi t th e publi c b y increasin g th e utility o f a n airplan e tha t

incorporate s ne w technologie s whic h enhanc e safety , suc h a s avionic s tha t

increas e situationa l awareness . 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 no t

grante dbecaus e th e weigh t o f th e airplane , an d therefore th e payload , woul db e reduced . Th e petitione r state s safet

y i s no t adversel y affecte dbecaus e th e mode l DA-4 2 M-N G ha s all th e compensatin g feature s liste di n th e AC . Th e Diamon dAircraf

t DA-4 2 M-N G i s aderivativ e o f th e Diamon dAircraf

t DA-4 2 N G an dDA-42 . Similar

exemptio n request s wer e grante dfo r th e Diamon dAircraf

t DA-4 2 N G (Exemptio n No . 10036 ) i n 201 0 an dDA-4 2 (Exemptio n No . 9623 ) i n 2008 . A summar y o f th e DA-4 2 exemptio n petitio n wa s publishe di n th e FEDERA L REGISTE Ro n Septembe r 6 , 200 6 (7 1 P R52609) . A simila r exemptio n reques t

wa s grante dfor

th e Cirru s Desig n Corporatio n SR2 2 (Exemptio n No . 9849 ) i n 2009 . A summary o f th e SR2 2 exemptio n petitio n wa s publishe di n th e FEDERA L REGISTE Ro n February 17 , 200 9 (7 4 F R7534) . N o comment s wer e receive dfo r eithe r exemptio n request . A n Equivalen t Leve l o f Safet y (ELOS ) (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 tha t

a n exemption , not

a n ELOS , i s appropriate . Sinc e the.exemptio n reques t o n th e model DA-4 2 M-N G i s th e sam e a s previou s requests , andth e mode l DA-4 2 M-N G incorporate s th e compensatin g feature s liste di n Advisor y Circula r 23.U19-2D , an dgrantin g th e DA-4 2 M-N G petitio n doe s no t

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

dela y actio n o

n it b y republisliin g i t

for publi c comment . Th e FAA' s analysi s i s a s follows : Th e FAA find s that

th e mode l DA-4 2 M-NG , a s modified'b y th e typ e desig n chang e define db y FA A projec t

TD0326CE-A , incorporate s th e compensatin g feature s liste di n Advisor y Circula r 23,1419-2D , paragrap h 13.a.(l)(c) .03/29/201 0 14:2 8 816329410 6 SA D PAG E 05/0 5



### Th e FAA* s Decision I n consideration o

f th e foregoing , I find tha

t agran t o f exemption i s i

n the publi c interest . Therefore , pursuan t t o the authorit

y containe di n 4 9 U.S.C . § § 4011 3 an

d44701 , delegate dt o m e b y th e Administrator , Diamon dAircraf t Industrie s Gmb

H i s granteda

n exemptio n fro m1 4 CF R§ 23.1419(a

) t o the exten t necessar y t o allow certification o

f the ic e protection syste

mon the mode

l DA-4 2 M-NG , subjec

t t o th e condition s an

dlimitation s listed below . Condition s an dLimitation s 1 . Production mode

l DA-42 M-N

G airplanes , prio

r t o being approvedfo

r flight in icing conditions , mus t

b e demonstratedt

o have aminimu

mstall warning margi

n o f 1 0 knots indicatedairspeed , wit

h n o ice , an d n o nuisanc e stal l warning dtiring norma l operation s a s describedi

n Diamon dAircraf t mode l DA-42 NG/M-N

G production tes t car dfo r "4. ) Stall - Test, " Form

#IG,001DA42 NG/M-NG , Chapte r 4 , Revision 4 , pag e 5 o f 8

- Issue di n Kansa s City , M O o n Marc h 29 , 2010 .

St«v? ^ Thompson . Actin g Manager , Smal l Airplan e Directorat e Aircraf t Certificatio n Servic e