Exemption No. 10465 

UNITED STATES OF AMERICA 

DEPARTMENT OF TEtANSPORTATION 

FEDERAL AVIATION ADMINISTRATION 

KANSAS CITY, MO 64106 

In the matter of the petition of 

VnaNG AIR LIMITED 

for an exemption from § 23.1549(b) 

ofTitlcH, Codeof 

Federal Regulations 

Regulatory Docket No. FAA-2011-1345 

GRANT OF EXEMPTION 

By letter dated November 30,2011, Mr. Adam Dennis, Certification Eagineer, 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) of Title 14, Code of Federal Regulations (14 CFR). The proposed exemption, if 

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

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

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

Twin Ottct airplane. 

The petitioner requests relief from the following regulation: 

Section 23.1549(b) prescribes, in pertinent part, that: 

^(h) 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 rcqueiit with the following information: 

The petitioner states: 

"Vildng 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^'^ engine displays. 

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

the following: 

1. 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 23.1549(b). 

2. This design and certification will be accomplished within fifteen (15) motilhs 

of granting this exemption. 

3. 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 pubhcation because the exemption, if granted, would not set a precedent, and any 

delay in acting on this petition would he detrimental to VAL. 

The FAA's analysis is as follows; 

The FAA finds that: 

1. The integration on the Apcx^ and with Crew Alerting System (CAS) messages, 

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

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

awareness of caution or warning conditions. 

2. The integrated cockpit envi]X)nment developed around Honeywell's Primus Apex^"^ 

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 parmers and suppliers, 

including Honeywell International. 

The FAA's Decision 

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

Therefore, pursuant to the authority contained in 49 U.S.C §§ 40113 and 44701, delegated to 
me by the Adininistrator, Viking Air Limited is granted an exemption with time-limited 

conditions from §23,1549(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: 

Conditions and Limitations 

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

requirements for engine indications fiiUy compliant with the requiriements of §§ 23,1549(a), 

(b), and (c), into the model DHC-6 Scries 400 airplanes no later than July 3 U 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, 2013. 

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

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

(AFM) a description of die 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 ihe. 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 tenmnates on July 31,2013, unless sooner superseded or rescinded. 

Issued in Kansas CityvMO, on March 1. 2012, 

John Colomy 

Acting Matiager, Small Airplane Directorate 

Aircraft Certification Service