08/22/2012 12:52

U.S. Deportment of Tronsportatlon Federal Aviation

. Administration 8153294105



### August 22, 2012
Mr. Carlos Ayala 

### Manager ofAirworthiness Cessn.a Aircraft Company One 

### Cessna Boulevard Post 

### Office Box 7704 Wichita, KS 67277 Dear

## Mr. Ayala: SAD



### Exemption. No. 10605 Small Airplane Directorate 901 Locust Kansas City, Missouri 641 OS



### Regulatory DocketNo. FAA-2012-0822

This letter is to 

### inform youthatwe have granted

### yourrequestfor 

### exemption. It

### tran.smits our decision, explains its basis, and gives you the conditions and limitations ofthe exemption. TheBasis for OurDecision PAGE 02/07



### By letter dated July 27, 2012, you pctitio.ncd. the Federal Aviation Administration (FAA) on behalfofCessna Aircraft Company (Cessna) for an. exemptionfrom the§ 23.49(c) stall speed requirement of§ 23.1419(a) ofTitle 14, Code ofFederal Regulatio.ns (14 CFR) to the extent necessaryto 

### allow Cessna

### to certify

### the model T240 Corvalis for flight in icing conditions. The FAA has determined that good cause exists for notpublishing a summary ofthe petition inthe 

### FEDERAL REGISTERbecause therequested exemption would not set aprecedent, and any delay in acting onthis petitionwould be detrimental to Cessna. The FAA has issued grants ofexemption 

### in circumstances similar in all material respects to those presented inyour petition. fu Grant ofExemptionNos. 9849 and 9623 (copies enclosed), the FAA found that other similar airplanescould not meetthe 61 knot stall speed requirement inicing conditions, but safety is not adversely affected due to the compensating features listed inAdvisory Circular23.1419-20. Having reviewed yourreasons for requesting an exemption, I fmd that-· • they are similar il1 

### all material respects to reliefpreviously requested in. the enclosed Grant ofExemptionNumbers 9623 and 9849; • the reasons stated by

### the FAA for granting the enclosed Grant ofExemption Numbers 9623 and 9849 also apply to the situationyou present; and • a grant ofexemption isin 

### the public interest.



### ACE-12-482-E08/22/2012 12:52 8153294105 SAD PAGE 03/07



### 2


### OurDecision 

### Underthe authority contained in 49 U.S.C. 40113 and 44701, which the

### FAAAdministrator has delegatedto me, Ihereby grant Cessna Aircraft Company an exemptionfrom 14 CFR 

### §23.1419(a) to the extent necessary to 

### allow Cessnato certificate model T240 for flight inicing conditions, subjectto the conditions and limits describedbelow. Conditions 

### and 

### J
...imitations 1. This exemption applies only to model T240 airplanes that conform to the Flight into Known Icing (FIKI) 

### majortype design change defined in FAAproject TD5550WI-A 2. This 

### exemption only applies to the stall speed

### requirement ih 

### 14 CFR 

### §23.14l9(a). Si11cerely,

Earl Lawrence 

### Manager, Small Airplane Directorate Aircraft Certification Service 

## 2Enclosures: Copy ofExemptionNumber 9623 Copy ofExemption Number 984908/22/2012 12:52 

### DocumentText Viewer

UNITED STATES OF AMERICA DEPARTMENT OF TRANSPORTATION FEDERAL AVIATION ADM:NISTRATION**I~NSAS** CITY 1 MO 64106 

### In the matter of the petition df**DIM~OND** AIRCRAFT J.NDUSTRIES GmbH, SAD

Exemption No. 9623

(DIAMOND AIRCRAFT) Regulato:r.y Pocket No. FAA-2006-25568 for an exemption from? 23.14J.9{a) of Title 14 1 Code of Federal Regulations GRANT OF EXEMPTION PAGE 04/07 

### Page 1of2

By letter dated August 7, 2006; Mr. Manfred Reichel, Chier:, Ot;f;i.ce of Airworthiness, Diarnon.<:l ·Aircraft Indu.striis GmbH, (Diamond Aircraft), N.A. OttoStr.asse 5, A-2700 Weiner-Neustadt, Austria, petitioned the Federal Aviation Administration (FAA) on behaJ.;I; of Diamond Aj.rcrf.lft for an exemption from ? 23.1419(a) of Title 14 1 Code of Federal Regulations {11 CFR). The**p~oposed** exemption, 

## if granted, would allow a stall speed above 61 knots in the landing 

### configuraUon (VSO), 

### in .i.cing conditions. The petitioner reques·ts relief from the following regulation: · Section 23.1419(a) prescribes that airplane performance, controllability, man®uvera.bi.tity,**o:;~nd** stability :m.u.st not be J.es.s than that r.equi:r.ed j.n. pa;r.t 23, subpa:t:t 

### B, 

## in the icing conditions defined in part 

### 25, Appendix 

### C. Section 23.49 is included in subpart B performance, and 23.49(c) requires VSO to be 61 knots or less for the Diamond Aircraft model DA-42. The petitioner supports its request with the following information: The petitioner states that compensating featur.o:s in support of th.e ;r,equ.ested exemption are listed in FAA Adviso:r.y C;i.;r.cuJ.OS!.r (AC) 23. l419-2C. The guidance in the AC is written for single engine airplanes, however the petitioner states this guidance should also be applicable to multi-engine airplanes. the pet:lt;i.oner states granting the· exemption would benefit T.h.e public by increasing the utility of an airplane that incorporates new technologies which enhance· safety, such as avionics that inc:ce.ase**s~.tuational** awareness. The utility of the airplane in icing would be reduced if the exemption were not granted because. the weight of the airplane, and therefore:: the payloa.d, wou.l.d. be reduced. The petitioner states safety is not adversely affected because the model DA-42 has 

### alJ. the compensating feature:s**~.:i.sted** in the AC. Although the petitioner requested that action on its petition not be delayed for publication in the Federal Register, the 

### FAA found that the: petition, if granted, would set a precedent. Therefore, to allow an opportunity for the public to comrn<::nt on the petition,·a summary of this petition was published in the Federal Register on September 6, 2006 (71 FR 52609). No comments were 

### received. The F.AA' s analysis is as follows: The**F~A** finds that the model DA-42 incorporates the compensating fcatur10:s lis1:ed in Advisory Circular 23.1419. Howevert in order 

### to assure the model DA-42. complies wi'th the 5 knot minimum margin of 14 CFR ? 23.207 (c), with c.d.tical ice accretionG, the stall warning margin on the airplane with no ice accretions must be**abov~** 9 knots indicated airspeed. The stall warning**m~rgin** must be less than

.08/22/2012 12:52 8153294105 SAD PAGE 05/07 

### Document

### Text Viewer 

### Page 2 of2

12 knots indicated airspeed to comply with the maneuver n".a;r.gj.n requirements**~.n** 14 CFR? 23.207(d). The FAA's Decision In consideration of the foregoing, I find tha.t 

### a. grant of exemption :i.s :i.n the public interest. Therefore, pursuant to the authority contained in 49 U.S.C. § 40113 and 44701, delegated to me by the Administrator, Diamond Ai:r.c;ca;r:t Industries GmbH is granted an exemption from J.4 CFR ? 23 .l4l9 (a.) to the extent necessary to allow Diamond Aircraft to certif.i.cate.the ice protection system on the model DA-42, su.bject to the conditions and limitations listed below. Conditions and Limitations J.. Production model DA-42 airplanes, p:r.ior. to being approved for flight in icing conditions, must be demonstrated to have a stall warning margin o.f: 9 to 12 knots indicated airspeed, with no ice, as described on either:


### a. Pages 18 and 20-22 of Work Instruction WI-OSB-42-0lS hice Protection System" in Diamond Aircraft Optional Service Bulletin OSB-42-015/3 (revision 3}, dated January 16, 2008. b. Diamond Aircraft model DA-42 p.r.odl.lctj,on test card for "4.) Stall

- Test," Form# IG.001DA42 D, Chapter 3, Revision 11, page 5 of 

### B. Issued in Kansas City, MO, on February 22, 2008. S/ Patrick R. Mullen, Acting Manager Small Airplane Directorate Aircraft Certification Service 2 ACE.-06-577-E

ACE-06-577-E08/22/2012 12:52 8153294105 SAD

ExemptionNo. 9849 

### UNITED STATES OF

### AMERICA DEPARTMENT OF TRANSPORTATION FEDERAL AVIATION ADMINISTRATION KANSAS CITY, MO 64106

Inthe 

### 1:natter ofthe petition of CIRRUS DESIGN 

### CORPORATION (CIRRUS DJi:SIGN) 

### for an exemption 

### from§ 23.1419(a) ofTitle 14, Code 

### of 

### Fcderal Regulations Regulatory Docket 

### No.**FAA-2009~0040**



### GRANT OFEXEMPTION 

### By letter dated January 13, 2009, Mr. Christopher

### Mitchell, Director, Airworthiness, Cirrus Design Corporation (Cirrus Design), 4515 Taylor Circle, Duluth, Minnesota, 55811 petitioned the Federal AviationAdministration (FAA) onbehalfofCirrus Designfor an exemptionfrom§ 23.1419(a) ofTitle 14, Code ofFedei:al Regulations (14 CFR). The proposed 

### exemption, if**granted~** would allow a stall speed 

### a.bove 61.knots 

### in the landing 

### configuration (Vso), in icing 

### conditions. · Thepetitionerrequests relieffrom the following regulation: PAGE 05/07



### Section 23.1419(a) prescribes that airplane 

### performance, controllability, maneuverability, and stability must not beless than that required inpart 23, 

### subpart B, in 

### the icing conditions definedinpart25, Appendix C. Section 23.49 is included 

### in subpartB perfonnance, and 

### § 23.49( c) requires Vso to be 61 knots otless for the Cirrus Designmodel SR22. 

### The

### petitioner supports its requestwith 

### thefollowing 

### information: The

### petitioner states that 

### compensating features in 

### support ofthe 

### requested exemption are listed in FAA AdvisoryCircular (AC) 23.1419-20. The

### petitioner states that granting the exemption would benefit the public byincreasingthe safety ofthe 

### airplane,

·since the model SR22 is primarily used for cross-countrytravel an.d has a high probability ofencountering inclement weather, including icing 

### conditions. Granting the08/22/2012 12:52

. 8163294106 SAD PAGE 07/07



### exemption would allow the airplane to be certified for flight into known icing with a system that has increased redundancy and capability compared to the system currently certified. The utility ofthe airplane in icing wouldbe reduced ifthe exemption were not granted because the

### payload would bereduced by approximately 302 pounds, or about 30 percent. The petitioner states safety 

### is not adversely affected because the model SR22 has all the compensating features listed in the AC. A 

### similar exemptionhas been grrutted on. amulti-engine airplane, and this was the first exemptionrequest for a 

### single engine 

### airplane. The FAA 

### found that the petition, 

### ifgranted, would set a precedent. Therefore,.to allow au opportunity for the 

### public to con1ment on the petition, 

### a summary ofthis petition was published in the Federal Register on Febtuary 17, 2009 (74 FR7534). No 

### comments were received. The FAA's analysis is as follows: 

### The FAA finds thatthe model SR22, as modified by

### the type design change defined by 

### FAA projectTD6406CH-A, incorporates the compensating features listed in Advisory Circular 23.1419-20, paragraph 13.a.(l)(c). TheFAA's Decision In 

### consideration ofthe foregojng, I find that a grant ofexemption is in the public interest. Therefore, pursuant to the authority contained in

### 49 

### U.S.C. §§ 

### 401 D and 44701, 

### delegated to me by

### the Administrator, Cinus Design Corporation is**~anted** 

### an exemption. from 14 CFR §

### 23.14l9(a) to the extent necessary to allow Cirrus Design to certificate tbc ice protection system onthe model SR22, 

### subject to the conditions and limitations listed below. Conditions and Limitations 

### This exemption applies onlyto model SR22 airplanes that confonn to the Flight into 

### Known. Icing (FIKJ) major

### type design change defined in F A.A. 

### projectTD6406CH-A. Issued in Kansas City, MO on April 2, 2009. s/ 

### JohnCotomy 

### Acting Manager, Small Airplane Directorate Aircraft 

### Certification Service

2