CAR 700.16 (2) question

[RedAndWhiteBaron]

So, I'm studying the CARs...

(2) Where the flight is conducted under Subpart 4 or 5 using an aircraft other than a helicopter or a DeHavilland DHC-6 aircraft pursuant to the Commercial Air Service Standards, a flight crew member shall receive at least 24 consecutive hours free from flight duty following 3 consecutive flight duty time assignments that exceed 12 consecutive hours unless the flight crew member has received at least 24 consecutive hours free from flight duty between each flight duty time assignment.

Emphasis mine.

I can see perhaps how helos may be excluded as a class due to operational concerns that I am unaware of. But why is one specific airframe, specifically a twin otter, exempted from duty requirements? And why not from a 703 operation?

Not trying to open a can of worms, but does anyone have an idea as to why twotters are exempted from duty regs?

[digits_]

Lobbying by some DHC-6 operator(s).

There are a few versions of the story posted in avcanada somewhere, but I can't find the topics. It sure is an interesting regulation.

[short bus]

Believe that's known as the Borek clause

[windows94]

Its because in the summer where a lot of twin otter operations take place there is 24 hr sunlight for a short period of time during the summer. This allows for various summer operations to take place. ie fuel caching to remote places.

[RedAndWhiteBaron]

Its because in the summer where a lot of twin otter operations take place there is 24 hr sunlight for a short period of time during the summer. This allows for various summer operations to take place. ie fuel caching to remote places.

It would make sense then to exempt all non scheduled aircraft operating north of the arctic circle or maybe north of 60 for the months of June and July, or make the exemption based on mission and location. There must be more to it than that?

It's interesting for sure, I'll see what I can find on the history of it. Apparently Ken Borek may have something to do with it.

[Heliian]

Probably due to the current aircraft cert requirements. It now has to sit in 704 if it has too many seats.

[goingnowherefast]

How many Twin Otters are actually operated 704? 9 people and a bunch of gear is enough, can't see the big need for the 10ths seat. Maybe Harbour Air is 704, but I can't see the need in the Arctic or Antarctic. Just put in 9 seats and be 703.

2 more years, and that's all gone anyway.

[Heliian]

How many Twin Otters are actually operated 704? 9 people and a bunch of gear is enough, can't see the big need for the 10ths seat. Maybe Harbour Air is 704, but I can't see the need in the Arctic or Antarctic. Just put in 9 seats and be 703.

2 more years, and that's all gone anyway.

Air Inuit for one(704/5) or air borealis, tindi, kba, harbour. Pretty much anyone with a twotter.