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17 AUG 2015

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. 11059 – Application for Exemption or Extension

REFERENCE: FAA Docket Number: FAA-2011-1345

A year ago, I wrote to you requesting an extension to Exemption No. 10465. Subsequent to that, 

Exemption No. 11059 was issued to address our request.

During the past year, Viking Air Limited (VAL) and Honeywell International Inc. (HI) have made 

significant headway 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). Transport 

Canada had the opportunity to fly the aircraft to evaluate this option, S.O.O. 6280 “FAA Instrument 

Display Colours”, in May 2015. I draw your attention to Item 5 on Page 3 in the attached Flight Test 

Debrief Note that states the “...FAA gauges were judged to comply with 23.1549...”. Video and photos 

are available if you require.

At the beginning of June, HI informed VAL of a memory allocation software issue, which caused a 

delay in submitting their TSO application until 10 AUG 2015. Up until this issue was identified, both 

HI and VAL believed we were on track to meet the implementation date of the exemption. Additional 

information is available from HI if required.

VAL is requesting an additional twelve-month extension to the exemption or the issuance of a new 

exemption. This would ensure that all US registered aircraft (new production and retrofit) will be fully 

compliant with 23.1549(b), by July 31, 2016.

Currently, there are eight DHC-6 Series 400 aircraft registered in the US, and an additional three 

operated by the US Army. Our current order book shows a possibility of two more aircraft being 

delivered into the US by the end of 2015. As stated previously, a number of these aircraft have ordered

Autopilot and TCAS II. It is expected to take three weeks per aircraft to incorporate the modifications 

once they are approved. Table A shows the aircraft delivery schedule and the aircraft awaiting the 

upgrades.
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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 WELLS FARGO BANK 

NORTHWEST NA TRUSTEE Delivered Required Required

870 TUDOR INVESTMENT CORP Delivered Required Required

871 BANK OF UTAH TRUSTEE Delivered Required Required

888 NASS HOLDINGS LLC Delivered Required Required

900 WELLS FARGO BANK 

NORTHWEST NA TRUSTEE Delivered Required Required

901 HILCORP EQUIPMENT LLC Delivered Required Required

903 NASS HOLDINGS LLC Delivered Required Required

913 NASS HOLDINGS LLC Delivered Required Required

929 LOCH ARD NOV 2015 Not Ordered Not Ordered

931 LOCH ARD DEC 2015 Not Ordered Not Ordered

Given the delay in HI obtaining TSO approval, and the subsequent work VAL needs to accomplish, we 

are currently scheduled to obtain Transport Canada certification in October 2015. Once this is 

completed, we will provide the FAA with technical data in consideration for a Type Certificate

revision. Although the plan allows FAA certification long before 31 JUL 2016, the extension request 

time should provide the additional buffer to ensure no further extension will be required.

I appreciate your consideration of this request and look forward to hearing back from you at your 

earliest convenience.

Yours truly,

Adam Dennis, P.Eng.

Manager, Certification Engineering

cc.

Jim Rutherford, FAA - Small Airplane Directorate

Roger Goossens, TCCA - Prairie and Northern Region

Tania Espinosa, Honeywell - Program Manager

Table A – US Registered Aircraft