13 AUG 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 has not be certified in time to meet the Exemption’s requirement of 31 JUL 2014 for 

incorporation in production.

VAL is requesting an additional twelve-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 aircraft will be 

retrofitted within three months from that date (October 31, 2015).

To date, VAL has exported seven aircraft to the US, and our current order book shows a possibility of 

ten more aircraft over the next year. Of these seventeen 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. Table A shows the aircraft delivery 

schedule and the aircraft awaiting the upgrades.

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, 

during the first quarter of 2015. The extension request time of 31 JUL 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.

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If for any reason, there are additional delays in the Phase 2 program that would preclude the 

certification of compliance to 23.1549(b) by 31 JUL 2015, Viking Air Limited will segregate these 

items to ensure the requirements of Exemption No. 10465 are met.

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 Delivered Not Ordered Not Ordered

901 HILCORP JUL 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

918 Vacant JAN 2015 Unknown Unknown

920 LOCH ARD MAR 2015 Not Ordered Not Ordered

921 AEROSTAR APR 2015 Not Ordered Not Ordered

926 AEROSTAR JUN 2015 Not Ordered Not Ordered

VAL will be conducting certification testing starting October 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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