16 JUN 2014

Mr. Pat Mullen

FAA - Small Airplane Directorate

901 Locust St

Room 301

Kansas City, MO 64106

USA

Dear Mr. Mullen:

SUBJECT: FAR 23.1549(b) - Exemption No. 10465 – APPLICATION FOR EXTENSION

REFERENCE: FAA Docket Number: FAA-2011-1345

Further to my letter dated 02 MAY 2013, Viking Air Limited (VAL) and Honeywell International Inc.

(HI) have been diligently working to address compliance with 23.1549(b) for the DHC-6 Series 400 to 

satisfy the “Conditions and Limitations” stated in the subject exemption (attached for your reference).

Due to unforeseen program delays with the integration of the Autopilot system on the Series 400, the 

program will not be certified in time to meet the Exemption’s requirement of 31 JUL 2014 for 

incorporation in production.

VAL is requesting an additional six-month extension to the exemption. This would ensure that aircraft 

delivered after January 31, 2015 will be fully compliant with 23.1549(b), and all aircraft will be 

retrofitted within three months from that date (April 30, 2015).

To date, VAL has exported six aircraft to the US, and plan on delivering seven more aircraft this

calendar year. Of these thirteen aircraft, eight require the Autopilot and TCAS II systems. It is expected 

to take three weeks per aircraft to incorporate the modifications once they are approved. The aircraft 

without the Autopilot and TCAS II systems will require limited modification and software updates, 

which can be completed in less than a week.

All thirteen aircraft are expected to be delivered before VAL has certification at the end of 2014 for the 

HI “Phase 2” configuration. Table A shows the aircraft delivery schedule and the aircraft awaiting the 

upgrades.

Although the number of aircraft affected by Exemption No. 10465 has increased from the original 

seven estimated, the number is still relatively small at thirteen, involving three additional customers, 

making a total of seven.

I am confident given the current state of the program, and our impending HI software freeze, VAL will 

be in a position to certify the Phase 2 configuration, including the outstanding exemption requirement,

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by November 2014. The extension request time of 31 JAN 2015 will provide the additional buffer to 

ensure no further extension will be required.

This additional time will enable our 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.

Honeywell Phase 2

S/N Customer Planned Delivery Autopilot TCAS II

852 US Army Delivered Required Required

862 US Army Delivered Required Required

863 US Army Delivered Required Required

869 DFAIR Delivered Required Required

870 TUDOR Delivered Required Required

876 LOCH ARD Delivered Not Ordered Not Ordered

900 TWIN EXPRESS JUN 2014 Not Ordered Not Ordered

901 HILLCOPR JUN 2014 Required Required

903 GAL JUL 2014 Required Required

904 GAL JUL 2014 Not Ordered Not Ordered

905 LOCH ARD AUG 2014 Not Ordered Not Ordered

906 LOCH ARD AUG 2014 Not Ordered Not Ordered

913 GAL DEC 2014 Required Required

VAL will be conducting certification testing starting August and welcome the FAA to see the green 

arcs in person. If you would like to visit us in Victoria, please contact the undersigned to set up 

arrangements, or request additional information for this extension.

Yours truly,

Adam Dennis, P.Eng.

Manager, Certification Engineering

cc.

Jim Rutherford, FAA - Small Airplane Directorate

Roger Goossens, TCCA - Prairie and Northern Region

Table A – US Registered Aircraft Deliveries

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