# ~~ U.S. Departmen t of Transportation 

### Fe d eral Aviation Administration

September 19, 20 14

Mr. Adam Dennis Manager, Certifi cation Engi n eering Viking Air Limit e d Victoria In ternat io n a l A irport 1959 de Ha v ill an d Way Sidney, British Co lum bia V8L 5V5, Cana da D ear Mr. Adam Denni s : Exemp tion No. 1 1059 Small Airp lane Directorate 90 I Locust Street Kansas City, Missouri 64106

Re gu latory Do cket No. FAA-20 11-1 345

This letter i s to inform you that we h ave granted yo ur request for exemptio n . It transmits our decis ion, expla in s its basis, and g iv es you the conditio n s and limit ations of the exe mption , including th e date it e nd s. 

### The Basi s for Our Dec ision By letter dated August 13 , 2014, you petitioned the Fede ral Aviation Ad mi nistration (FAA) on behalf of Viking Air Limited (VAL) for an exte n sion of Exe mption No. 1 0465. T h at exe mption fr o m 

### § 23.1549(b) of T itl e 14 , Code of Fede ral R eg ul at ion s (14 CFR) permits VAL to receive ty pe certificati on approva l of the Model DH C-6 Series 400 a irplane s with a non - comp l iant type design fo r the e n gine i ndication syste m for a limited tim e. ln your petition , you in d icate that a s mall nu mber of U.S. airc raft are affected by Exemption No. 10465 and VAL is requesting another 12 month extensio n to the exemption. T his would ensure that a ircraft delive red after Jul y 31 , 2 015 will be fully compliant w ith 

### § 23

. 1 549(b) and a ll in -service aircraft wi ll be r etrofitted within three months from that date (October 31, 20 15). Yo u state that yo u are co nfid e nt thi s add iti ona l tim e w ill enab l e you to complet e the certification of th e modifi ed avionics. You have a l so committed to seg regat e th e e ngine di splay software correction fro m the optional avionics upgrades i f the up grade certificatio n causes any additional delays that preclude the engine di sp la y correction.

ACE -14- 339-E

### T herefore , VAL requests a n extension to Jul y 3 1 , 2015 for incorporation into production line requirements of a eng ine indi cation system fu ll y comp li an t with the requirement s of 2


### § 23 .1549(b) and an extension to O ctobe r 3 1 , 20 1 5 for retrofit of all in- service Model DHC-6 Series 400 a irplan es. This add itional t i me will enable your customers to schedule the incorporation of the exemption's terminating action a long with their "Phase 2 " upgrades in to a s in gle maintenance event and keep their downtim e to a minimum. The FAA has determined that good cause exists for not publishing a summary of the petition in the Federal Register because the requested extens ion of the exemption would not se t a precedent and any delay in actin g on this petition would be detrimental to VAL. Having reviewed yo ur reasons for requesting an exemption, 1 find that- • the y are s im il ar in a ll m ateria l respects to relief prev iously req uested in the enclosed

Grant of Exemption Nos. 10465 a nd 1 0465A ; • the reasons sta ted by th e FAA for gra nting the e nclo se d Grant of Exemption Nos. 1046 5 and 1 0465A a lso app ly to the situation yo u present; and • a grant of exempt io n is in th e public interest. Our Deci s ion Und e r the auth orit y contained in 49 U.S.C. 106 (f) , 40 1 13 and 4470 1 , which the FAA Administrator has delegated to me, 1 hereby grant Viking Air Limited an exemption from 14 CF R 

### § 23. 1549(b) to th e extent necessary to a ll ow VAL to receive type cert ifi cat ion approval of the Model DH C-6 Series 400 airp lane s wi th a non-compl iant type d es ig n for the e n g in e indi cation system for a li mited time, s ubje ct to the conditions and li m i tations described below. Co ndition s and Limitations 1

. Viking A ir Limited must certifY and incorporate into th e production line requirement s for eng in e indications fully compli ant w ith the requ ir emen t s of § 23. 1549(a) , (b) , and (c) , into the mode l DHC-6 Series 400 airp lanes no later than Ju ly3 1 ,2015. 2. Viking Ai r Lim ited mu st retrofit t h e model DHC-6 Series 400 airplanes delivered un der the terms of the exemption with the new engine indications described in Condition 1 above no lat er than October 31 , 2015. 3. Until the inc orpora tion of the changes requ ir ed in Conditions 1 and 2 of this exemption have been completed , Viking Ai r Limited must add to the airplane flight man u a l (AFM) a d escription of the indications and their non-compliant use of co lor , and the necessary in str uction s for properly int erpreti ng indi cations. 4. For airp lanes subject to Condit ion 2 of this exempti o n , the operating limitations section of the airp lan e flight manual (AFM) must include the following statement:" No pe r so n may ope rat e thi s airp l ane after Oc tober 31, 2 01 5, u nless th e e n g i ne indi cati o n s h ave b ee n m o di fie d in acc ord an ce w ith th e te rm s o f Exe mption No. 11 059" 

### 3

T hi s state m ent may be re m oved from the AFM afte r the requ ired mod i ficat io n has bee n m a d e. T h is exemptio n te rmi na tes o n July 3 1 , 20 1 5, unl ess sooner s uperseded or resc i nded. Since rely,



# u~ Ear l Lawre n ce M anage r, S m a ll A irpl an e D irec tora te A ir c r

a ft Ce rt ifi cati o n Serv ice E n c los ure[ s]

### Exempt ion No. 10465 UNITED STATES O F AMERICA DEPA R TMENT OF TRANSPORTA TI ON FEDERAL AV I AT I ON ADMIN I STRATION KANSAS C IT Y, M O 64 1 06

In the matter of the petition of VIKIN G AIR LIMI T ED for an exemption from§ 23. 1 549(b) of Title 14 , Code of Federa l Regul ations Regul atory Docke t 

### No

. FAA -2011-1345



### l. GRAN T OF E XEMPTIO N By letter dated November 30, 20 1 1, Mr. Adam Dennis , Certification E ngineer , Viking A ir L imi ted (VAL), 1959 de Hav ill and Way , Sidney , B r it is h Colu mb ia V8L 5V5 pet it io ne d the Fede ra l Aviatio n A d m i n istration (FAA) o n be h al f of VAL for an exemp tion from § 23. 1 549(b) ofTi tle 14 , Code of Fede ral Regulat io n s (14 CFR). The proposed exemption , if granted , wou ld allow VAL to temporaril y use the co lor white in lieu of green on the Honeywell Primus Apex (ApexTM) 

### Electron ic Fligh t Instrument System ( EF IS) to depict normal engine operating condit io n s during certification testing of the VAL DHC-6 , Se r ies 400 Twin Otte r ai rp lan e. The petitioner requ es ts re lief from th e foll owin g re g ulati o n: Section 23 .1549(b) prescri b es , in pertine nt part , that: "(b) Each no rm a l operati ng range mu st be m arked wi th a gree n arc or green l in e, no t extending beyo nd the maximum and mini mum safe limi ts ;" The petitioner supports i ts r e que s t with the followin g inform a tion: Th e petitioner states: "Viking A ir Li mit e d (VAL) req uests a te mporary exe mp t io n f ro m the requirements of 14 CF R 23 .1549(b) for the VAL DHC-6 Series 400 (Twin

ACE- 12-129

- EOtter) to the extent necessary to a ll ow FAA type certification of the a ir craft with th e current Honeywell Primu s Apex

## TM e n g in e displays. As cond itions for granting th e requested temporary exemption, VAL commits to the following: 2. VAL working with Honeywell int ernational In c. w ill design and certi fy an engine d i splay configuration on Primus ApexTM for the DHC-6 Series 400 specific to meeting the FAA normal engi ne display color requirements as specified in FAR 23 .l549(b ). 3. This design and certification will be accomp li s hed within fifte en (15) months of granting this exemption. 4. VAL will provide a serv ice bulletin to all US-registered field a ir craft after certifying the new display con fi gu ration ." Th e FAA has det er mined that good cause exists for waiving the requireme nt for Federal Register pub li cation because the exemption , if granted , would not set a precedent, and any delay in acting on this petition would be detrimental to VAL. 

### The FAA's analysis i s as follows: The FAA finds that: 

### 5

l

. The integration on the ApexT M

and with Crew Alerting System (CAS) messages, dynamic caution and warn ing e ngin e display ranges , and integra tion w ith the Master Caution 

### I Warning (MCW) System ac hieve s a high level of safety that ens ures immediate pilot awareness of caution or warning conditions. 2

. The integra ted cockpit environment developed around Honeywell 's Primus ApexrM also enhances the availability of engine information on both the pilot and co-pilot's Primary Flight Displays (PFD 's)

. 3. The overall integration of the cockpi t , the caution and warning level CAS messages available with resp ect to eng ine torque and T5 displays , and the associated digital di splay inverse vi deo ca ution and warni ng l evel display design effec ti ve ly provides the crew with current operating information , crew alerting, and achieve a hi g h degree of safe ty
. 4. The den ia l of this petition for exemption wou ld delay the United States certification of the DHC-6 Series 400 airplane for approximately fifteen ( 15) months. VAL and U.S. DH C-6 Series 400 operators would experie n ce significant revenue loss as a result. Additionally , the US Army wou ld be delayed access to the aircraft. Thi s delay may also result in aircraft order cancellations and revenue loss for Viking 's US partners and s uppliers , including Honeywell International.5. The FAA's Decision 

### In con s id e ration of the foreg oing , 1 find that a grant o f exe mption is in th e public int erest. T h erefo re, pursuant to th e authority co ntained in 49 U.S.C. §§ 4 0 11 3 and 4470 1 , delegated to me b y the Ad mini s trator , Viking Air 

### Limited is granted an exemptio n w ith ti me-lim ited conditions from §23

. l 549(b) to the extent nece ssary to allow type ce rtification of the mod e l DHC-6 Series 400 airplan es w ith e ng in e indication s not in compliance w ith th e requirem ent s of§ 23.1549 (b). For th e m ode l DHC-6 Series 400 airplanes, thi s exe mption i s s ubje ct to th e follow in g cond iti o ns and limitations: 6. Conditions and Limitations 

### 1. Vikin g Air Limi ted mu st cert i fy a nd inco rp orate into the pro duction l ine re quireme nt s fo r engine indi cations fu ll y compli ant with the requirements o f §§ 23. 1 549(a), (b) , and (c) , int o the m ode l DHC-6 Series 400 airpl an es no later than Jul y 3 1 , 20 1 3. 2. Viking Air Limite d must retrofit the mod e l DHC

- 6 Ser i es 400 airplan es deliv e red und e r the te rm s of the exemption with the new e ng in e indi cation s described in Co nditi o n I above no l ater th a n D ecembe r 3 1 ,2 01 3. 

### 6

3

. U n til th e in corpo ratio n of the c hanges required in Cond itions 1 and 2 of this exemption h ave b ee n completed, Viking Air Limited mu s t add to the airplane fli g ht manu al (AFM) a d esc ription of the indication s and their no n -co mpliant u se of color , and th e nece ssary ins tru ctions for properly interpreting indications. 4. For airp lanes s ub ject to Cond iti o n 2 of this exemptio n , th e o peratin g l imitations sectio n of the a irplane fli g ht manual (AFM) mu st in c lud e th e following s tat e me nt: "No person m ay o p erate this a irplane after D ecembe r 3 1 , 2 013 , unl ess the engi ne indications have been modifi ed in acco rdan ce with the terms of Exemp tio n No. " This state me nt ma y b e r e moved f rom the AFM after the req uire d modification h as b een m ade. This exe mp tio n te rminate s on July 3 1 , 2013, unle ss soo ner superseded o r resc ind ed. Issued in Kansas C it y , MO , on March l , 20 12.
sf 

### J o hn Colomy Ac ting Manager, S mall Airplane Dir ectorate Aircraft Certification ServiceU.S. Department of Transportation Federa l Avi atio n Administrat i o n

To: Mr

. Adam Dennis Manager , Certifi cation E n gineerin g Viking Air Limited Victori a I nternationa l Airport 1959 d e Havilland W ay Small A irpl ane Direct orate 90 l L ocust Street Kansas City , Missouri 64106

Date: Jul y 16, 2 013

Sidney , Brit ish Columbia V8L 5V5 , Canada

Subject: Co rrection to Exemption No. I 0565A Action :

Rem a rk s: Per Your R eque s t X For Your Informati o n P

e r Our Conve rsatio n Note and R eturn Discuss With Me For Your Approval Fo r Your S ignatur e C omment Take Appropriate Action Pl ease Answer

_ Prepare R eply F or:

Viking Air Limited, Exemp ti o n No. 10465A did n o t incl ude an upd ated date in co ndition numb e r 4 to a ll ow airc raft operator s to take fu ll advantage of thi s exemption extens io n . Attached i s a co rrected copy with the upd a ted dat e in condition numb e r four. P lease file thi s w ith the o ri g in a l s ig n e d Exemption No. 

### 1 0465 and 

### I 0465A. We are sorry for th e error and h ope it h as not in conveni enced yo u . I f yo u h ave any qu estio n s , pl ease ca ll. // SIGNED// William Schinstock Manager, Regulations & Policy ACE-11 1 Fed era l Aviation Administrati o nU.S. D epartment of Transportation 

### Federal Aviation Administration Small Airplane Di rec t orate 90 I Locust Street Kansas City , Missouri 64 106



### CORRECTED COPY This letter corrects the June 14 , 2013, letter we sent granting your petition to ex tend Exemption No. 10465. The date in condition number four s hould have been updated to give operators the full benefit of the exemption exte nsion. June 14 , 20 13

Mr. Adam Dennis Manager , Certification Eng in eering Viking Air Limited Victoria International Airport 1 959 de Havilland Way S idn ey , British Columbia V8L 5V5 , Canada Dear Mr. D e nnis: Exe mption No. 1 0465A Reg ulatory Dock et No. FAA-20 11

- 1345

This lett e r i s to inform you that we have gra n ted your petition to extend Exemption No. 10465

. It exp lains the ba s i s for our deci s ion and describ es it s effect. 

### The Ba sis of Our Decision By letter dated May 6 , 2013 , you petition ed the Federal Aviation Adm i nistration (FAA) on behalf of Viking Air Limited (VAL) for an extension of Exemption No. 10465. That exemption from§ 23. 1 549(b) of T itl e 14 , Code of Federal Regulations (14 CFR) permits VAL to rece ive type certification approval of the Model DHC-6 Series 400 airplanes with a non-compliant type design for the engine indication system f or a limited time. 

### In your petition, you indicate that due to the s mall numb e r of aircraft affected by Exemption No. 1 0465, a nd th e fact that three of the seve n aircraft are ope ra ted by one entity , VAL is requesting a 12 month exte n s ion to the exemption. This would ensure that aircraft delivered after Jul y 31, 2014 will b e fully compliant with§ 23.1549(b) , and all aircraft will be retrofitt ed w ithin three month s from th at date (October 31 , 20 14). This additional time wille n able yo ur c u sto m e r s to sc hedu le the in co rporati on o f the exe mption 's terminating action a lo n g with the ir " Phase 2 " up g rade s int o a s ingl e mainte nanc e event and kee p the ir downtim e to a minimum. Therefore , VAL requ ests an exten s ion to Jul y 3 1 , 2 014 for incorporation into pro duction lin e r e quireme nt s of a engine indication sys t e m full y co mpliant with the requ ireme nt s of§ 23 .1 5 4 9(b) , and an ex te n sion to O cto b er 31 , 20 14 f or r e trofit of a ll fi elde d Mode l DHC-6 Series 400 airp lanes. T he FAA ha s determined that good cause exists for not publi s hin g a s ummary o f the petition in th e Fed eral Reg i ste r b ecau se the req u este d extension of the exem ption would not set a pr ecedent , and any d e l ay in acting on thi s petition wo uld be d etrime ntal to VAL. 

### Our Decision: The FAA h as determined that the ju s tifi cat io n for th e i ssuance of Exempt ion No. 10465 , re main s va lid w ith r espec t to this exempt ion and i s in the publi c inte re s t. T he ref or

e, under the authority provid e d by 49 U .S.C. 40 I 1 3 and 44 70 I , wh ich the FAA A dmini s trator h as delegate d to me , I g ra nt yo ur p et iti o n to extend Exe mption No. 10465. 

### The Effect of Our Deci s ion Our decision ex te nd s the t e rmin at i on d ate of Exemption No. I 0 4 65 to Jul y 31 , 2 014 , unl ess s up e r se d e d or rescinde d. Co nditio n s 1 , 2 and 4 of the o rigina l exempt ion are c h an ged as follows : 1. Viking A ir Limit ed mu s t certify a nd incorp o r a t e into th e production li ne re quirem e nt s fo r e n g in e indi cati o n s full y co mpliant wi th th e req uir eme nt s of § 23.1549(a), 

### (b) , a nd (c) , into the mod e l DHC-6 Seri es 400 a irpl anes no lat e r th a n July 3 1 , 20 14. 2. Vikin g Air Limite d must retrofit th e mod e l DHC-6 Se ri es 400 airplanes d e li ve r e d und e r the t e rm s of the exemption with the n ew e n gine indicat ions d esc rib ed in Co nditi o n 1 above n o lat er than October 3 1 , 20 14. 3. Until th e incorporation of th e change s required in Co ndition s 1 a nd 2 of thi s exemption ha ve be e n co mpl eted , V ikin g A i r Limite d mu st a dd to the a irplane flight manual (AF M) a d escription of the indi cations and the ir n o n-compliant use of co lo r , and th e necessary in struction s for properl y int e rpretin g indi cations. 4. For a irplanes s ubj ec t to Condition 2 of this exe mp t io n , the operat in g limitati ons sectio n of the airplane flight manual (AFM) mu s t includ e the follo wing s tatement:

" No p e r so n may operate this airp lane after October 31, 20 14 , unless the e ngine indication s have b ee n modifi e d in accordance w ith the te rm s of E xe mption No. 10465 "

### This statement may be removed from the AFM after the required modification has been made.

All other conditions and limitations of Exemption No. l 0465 remain the same. This letter must b e attached to, and is a part of, Exemption No. I 0465. Sincerely , //S I GNED// Earl La wre nce Manager , Small Airplane Directorate Aircraft Certification Service