~~ U.S. Department 

of Transportation 

Federal Aviation 

Administration 

September 19, 2014 

Mr. Adam Dennis 

Manager, Certification Engineering 

Viking Air Limited 

Victoria International Airport 

1959 de Havilland Way 

Sidney, British Columbia V8L 5V5, Canada 

Dear Mr. Adam Dennis: 

Exemption No. 11059 

Small Airplane Directorate 

90 I Locust Street 

Kansas City, Missouri 64106 

Regulatory Docket No. FAA-2011-1345 

This letter is to inform you that we have granted your request for exemption. It transmits our 

decision, explains its basis, and gives you the conditions and limitations of the exemption, 

including the date it ends. 

The Basis for Our Decision 

By letter dated August 13, 2014, you petitioned the Federal Aviation Administration (FAA) 

on behalf of Viking Air Limited (VAL) for an extension of Exemption No. 10465. That 

exemption from § 23.1549(b) of Title 14, Code of Federal Regulations (14 CFR) permits 

VAL to receive type certification approval of the Model DHC-6 Series 400 airplanes with a 

non-compliant type design for the engine indication system for a limited time. 

ln your petition, you indicate that a small number of U.S. aircraft are affected by Exemption 

No. 10465 and VAL is requesting another 12 month extension to the exemption. This would 

ensure that aircraft delivered after July 31 , 2015 will be fully compliant with § 23 .1549(b) and 

all in-service aircraft will be retrofitted within three months from that date (October 31, 20 15). 

You state that you are confident this additional time will enable you to complete the 

certification of the modified avionics. You have also committed to segregate the engine 

display software correction from the optional avionics upgrades if the upgrade certification 

causes any additional delays that preclude the engine display correction. 

ACE-14-339-E 
Therefore, VAL requests an extension to July 31, 2015 for incorporation into production line 

requirements of a engine indication system fully compliant with the requirements of 

2 

§ 23 .1549(b) and an extension to October 31, 2015 for retrofit of all in-service Model DHC-6 

Series 400 airplanes. This additional time will enable your customers to schedule the 

incorporation of the exemption's terminating action along with their "Phase 2" upgrades into a 

single maintenance event and keep their downtime 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 extension of the exemption would not set a 

precedent and any delay in acting on this petition would be detrimental to VAL. 

Having reviewed your reasons for requesting an exemption, 1 find that-

• they are similar in all material respects to relief previously requested in the enclosed 

Grant of Exemption Nos. 10465 and 1 0465A; 

• the reasons stated by the FAA for granting the enclosed Grant of Exemption Nos. 10465 

and 1 0465A also apply to the situation you present; and 

• a grant of exemption is in the public interest. 

Our Decision 

Under the authority contained in 49 U.S.C. 106(f), 40113 and 4470 1, which the FAA 

Administrator has delegated to me, 1 hereby grant Viking Air Limited an exemption from 

14 CFR § 23. 1549(b) to the extent necessary to allow VAL to receive type certification 

approval of the Model DHC-6 Series 400 airplanes with a non-compliant type design for the 

engine indication system for a limited time, subject to the conditions and limitations described 

below. 

Conditions and Limitations 

1. Viking Air Limited must certifY and incorporate into the production line 

requirements for engine indications fully compliant with the requirements of 

§ 23. 1549(a), (b), and (c), into the model DHC-6 Series 400 airplanes no later than 

July3 1,2015. 

2. Viking Air Limited must retrofit the model DHC-6 Series 400 airplanes delivered 

under the terms of the exemption with the new engine indications described in 

Condition 1 above no later than October 31 , 2015. 

3. Until the incorporation of the changes required in Conditions 1 and 2 of this 

exemption have been completed, Viking Air Limited must add to the airplane 

flight manual (AFM) a description of the indications and their non-compliant use 

of color, and the necessary instructions for properly interpreting indications. 

4. For airplanes subject to Condition 2 of this exemption, the operating limitations 

section of the airplane flight manual (AFM) must include the following statement: 
"No person may operate this airplane after October 31, 201 5, unless the 

engine indications have been modified in accordance with the terms of 

Exemption No. 11 059" 

3 

This statement may be removed from the AFM after the required modification has 

been made. 

This exemption terminates on July 31, 2015, unless sooner superseded or rescinded. 

Sincerely, 

Ear

u~ l Lawrence 

Manager, Small Airplane Directorate 

Aircraft Certification Service 

Enclosure[ s] 
Exemption No. 10465 

UNITED STATES OF AMERICA 

DEPARTMENT OF TRANSPORTATION 

FEDERAL AVIATION ADMINISTRATION 

KANSAS CITY, MO 64106 

In the matter of the petition of 

VIKING AIR LIMITED 

for an exemption from§ 23. 1549(b) 

of Title 14, Code of 

Federal Regulations 

Regulatory Docket No. FAA-2011-1345 

l. GRANT OF EXEMPTION 

By letter dated November 30, 2011, Mr. Adam Dennis, Certification Engineer, Viking Air 

Limited (VAL), 1959 de Havilland Way, Sidney, British Columbia V8L 5V5 petitioned the 

Federal Aviation Administration (FAA) on behalf of VAL for an exemption from § 

23.1549(b) ofTitle 14, Code of Federal Regulations (14 CFR). The proposed exemption, if 

granted, would allow VAL to temporarily use the color white in lieu of green on the 

Honeywell Primus Apex (Apex TM) Electronic Flight Instrument System (EFIS) to depict 

normal engine operating conditions during certification testing of the VAL DHC-6, Series 400 

Twin Otter airplane. 

The petitioner requests relief from the following regulation: 

Section 23 .1549(b) prescribes, in pertinent part, that: 

"(b) Each normal operating range must be marked with a green arc or green 

line, not extending beyond the maximum and minimum safe limits;" 

The petitioner supports its request with the following information: 

The petitioner states: 

"Viking Air Limited (VAL) requests a temporary exemption from the 

requirements of 14 CFR 23 .1549(b) for the VAL DHC-6 Series 400 (Twin 

ACE- 12-129-E 
Otter) to the extent necessary to allow FAA type certification of the aircraft 

with the current Honeywell Primus Apex TM engine displays. 

As conditions for granting the requested temporary exemption, VAL commits to 

the following: 

2. VAL working with Honeywell international Inc. will design and certify an 

engine display configuration on Primus ApexTM for the DHC-6 Series 400 

specific to meeting the FAA normal engine display color requirements as 

specified in FAR 23 .l549(b ). 

3. This design and certification will be accomplished within fifteen (15) months 

of granting this exemption. 

4. VAL will provide a service bulletin to all US-registered field aircraft after 

certifying the new display configuration." 

The FAA has determined that good cause exists for waiving the requirement for Federal 

Register publication 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 is as follows: 

The FAA finds that: 

5 

l . The integration on the Apex TM and with Crew Alerting System (CAS) messages, 

dynamic caution and warning engine display ranges, and integration with the Master Caution I 

Warning (MCW) System achieves a high level of safety that ensures immediate pilot 

awareness of caution or warning conditions. 

2. The integrated 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 cockpit, the caution and warning level CAS messages 

available with respect to engine torque and T5 displays, and the associated digital display 

inverse video caution and warning level display design effectively provides the crew with 

current operating information, crew alerting, and achieve a high degree of safety. 

4. The denial of this petition for exemption would delay the United States certification 

of the DHC-6 Series 400 airplane for approximately fifteen (15) months. VAL and U.S. 

DHC-6 Series 400 operators would experience significant revenue loss as a result. 

Additionally, the US Army would be delayed access to the aircraft. This delay may also result 

in aircraft order cancellations and revenue loss for Viking's US partners and suppliers, 

including Honeywell International. 
5. The FAA's Decision 

In consideration of the foregoing, 1 find that a grant of exemption is in the public interest. 

Therefore, pursuant to the authority contained in 49 U.S.C. §§ 4011 3 and 4470 1, delegated to 

me by the Administrator, Viking Air Limited is granted an exemption with time-limited 

conditions from §23 .l 549(b) to the extent necessary to allow type certification of the model 

DHC-6 Series 400 airplanes with engine indications not in compliance with the requirements 

of§ 23.1549 (b). For the model DHC-6 Series 400 airplanes, this exemption is subject to the 

following conditions and limitations: 

6. Conditions and Limitations 

1. Viking Air Limited must certify and incorporate into the production line 

requirements for engine indications fully compliant with the requirements of §§ 23. 1 549(a), 

(b), and (c), into the model DHC-6 Series 400 airplanes no later than July 31, 2013. 

2. Viking Air Limited must retrofit the model DHC-6 Series 400 airplanes delivered 

under the terms of the exemption with the new engine indications described in Condition I 

above no later than December 31,201 3. 

6 

3. Until the incorporation of the changes required in Conditions 1 and 2 of this 

exemption have been completed, Viking Air Limited must add to the airplane flight manual 

(AFM) a description of the indications and their non-compliant use of color, and the necessary 

instructions for properly interpreting indications. 

4. For airplanes subject to Condition 2 of this exemption, the operating limitations 

section of the airplane flight manual (AFM) must include the following statement: 

"No person may operate this airplane after December 31, 2013, unless the 

engine indications have been modified in accordance with the terms of 

Exemption No. " 

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

made. 

This exemption terminates on July 31, 2013, unless sooner superseded or rescinded. 

Issued in Kansas City, MO, on March l, 2012. 

sf 

John Colomy 

Acting Manager, Small Airplane Directorate 

Aircraft Certification Service 
U.S. Department 

of Transportation 

Federal Aviation 

Administration 

To: Mr. Adam Dennis 

Manager, Certification Engineering 

Viking Air Limited 

Victoria International Airport 

1959 de Havilland Way 

Small Airplane Directorate 

90 l Locust Street 

Kansas City, Missouri 64106 

Date: July 16, 2013 

Sidney, British Columbia V8L 5V5, Canada 

Subject: Correction to Exemption No. I 0565A 

Action: 

Remarks: 

Per Your Request 

X For Your Information 

Per Our Conversation 

Note and Return 

Discuss With Me 

For Your Approval 

For Your Signature 

Comment 

Take Appropriate Action 

Please Answer 

_ Prepare Reply For: 

Viking Air Limited, Exemption No. 1 0465A did not include an updated date in condition number 

4 to allow aircraft operators to take full advantage of this exemption extension. Attached is a 

corrected copy with the updated date in condition number four. Please file this with the original 

signed Exemption No. 1 0465 and I 0465A. 

We are sorry for the error and hope it has not inconvenienced you. If you have any questions, 

please call. 

//SIGNED// 

William Schinstock 

Manager, Regulations & Policy 

ACE-11 1 

Federal Aviation Administration 
U.S. Department 

of Transportation 

Federal Aviation 

Administration 

Small Airplane Directorate 

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 extend 

Exemption No. 10465. The date in condition number four should have been updated to give 

operators the full benefit of the exemption extension. 

June 14, 20 13 

Mr. Adam Dennis 

Manager, Certification Engineering 

Viking Air Limited 

Victoria International Airport 

1959 de Havilland Way 

Sidney, British Columbia V8L 5V5, Canada 

Dear Mr. Dennis: 

Exemption No. 1 0465A 

Regulatory Docket No. FAA-20 11 -

1345 

This letter is to inform you that we have granted your petition to extend Exemption No. 

10465. It explains the basis for our decision and describes its effect. 

The Basis of Our Decision 

By letter dated May 6, 2013, you petitioned the Federal Aviation Administration (FAA) on 

behalf of Viking Air Limited (VAL) for an extension of Exemption No. 10465. That 

exemption from§ 23. 1549(b) of Title 14, Code of Federal Regulations (14 CFR) permits 

VAL to receive type certification approval of the Model DHC-6 Series 400 airplanes with a 

non-compliant type design for the engine indication system for a limited time. 

In your petition, you indicate that due to the small number of aircraft affected by Exemption 

No. 10465, and the fact that three of the seven aircraft are operated by one entity, VAL is 

requesting a 12 month extension to the exemption. This would ensure that aircraft delivered 

after July 31, 2014 will be fully compliant with§ 23.1549(b), and all aircraft will be 

retrofitted within three months from that date (October 31 , 20 14). This additional time will 
enable your customers to schedule the incorporation of the exemption's terminating action 

along with their "Phase 2" upgrades into a single maintenance event and keep their downtime 

to a minimum. Therefore, VAL requests an extension to July 31, 2014 for incorporation into 

production line requirements of a engine indication system fully compliant with the 

requirements of§ 23 .1 549(b ), and an extension to October 31 , 2014 for retrofit of all fielded 

Model DHC-6 Series 400 airplanes. 

The FAA has determined that good cause exists for not publishing a summary of the petition 

in the Federal Register because the requested extension of the exemption would not set a 

precedent, and any delay in acting on this petition would be detrimental to VAL. 

Our Decision: 

The FAA has determined that the justification for the issuance of Exemption No. 10465, 

remains valid with respect to this exemption and is in the public interest. 

Therefore, under the authority provided by 49 U .S.C. 40 I 13 and 44 70 I, which the FAA 

Administrator has delegated to me, I grant your petition to extend Exemption No. 10465. 

The Effect of Our Decision 

Our decision extends the termination date of Exemption No. I 0465 to July 31 , 2014, unless 

superseded or rescinded. Conditions 1, 2 and 4 of the original exemption are changed as 

follows: 

1. Viking Air Limited must certify and incorporate into the production line requirements 

for engine indications fully compliant with the requirements of § 23.1549(a), (b), and 

(c), into the model DHC-6 Series 400 airplanes no later than July 3 1, 2014. 

2. Viking Air Limited must retrofit the model DHC-6 Series 400 airplanes delivered 

under the terms of the exemption with the new engine indications described in 

Condition 1 above no later than October 31, 2014. 

3. Until the incorporation of the changes required in Conditions 1 and 2 of this 

exemption have been completed, Viking Air Limited must add to the airplane flight 

manual (AFM) a description of the indications and their non-compliant use of color, 

and the necessary instructions for properly interpreting indications. 

4. For airplanes subject to Condition 2 of this exemption, the operating limitations 

section of the airplane flight manual (AFM) must include the following statement: 

"No person may operate this airplane after October 31, 20 14, unless the engine 

indications have been modified in accordance with the terms of Exemption 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 be attached to, and is a part of, Exemption No. I 0465. 

Sincerely, 

//SIGNED// 

Earl Lawrence 

Manager, Small Airplane Directorate 

Aircraft Certification Service