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Heavy Classification?

Fri Mar 22, 2002 6:11 am

Last night listening to Chicago approach on the internet I hear Am Tran *** heavy. I thought wow a L-1011 to MDW. I look it up on a flight tracker and it was a B753 LAS-MDW. I thought a HEAVY was a twin aisle jet.
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RE: Heavy Classification?

Fri Mar 22, 2002 6:14 am

It has to do with weight. It does not have to do with the number of aisles. All twin aisle aircrafts meet the weight requirement so all twin aisles are heavy.

Please correct me if I am wrong.
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RE: Heavy Classification?

Fri Mar 22, 2002 6:14 am

It can be confusing regarding what a heavy is. Generally, i think of a "heavy" as a twin aisle widebody plane. Anything from a 762 to a 744. I wouldn't consider a 757 heavy though.

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RE: Heavy Classification?

Fri Mar 22, 2002 6:30 am

The definition for a heavy (here in the US) used to be 300,000 lbs, but it was changed to about 255,000 (can't recall the exact figure). You might do a search of the messages, as I'm sure links to the official criteria have been mentioned before.

Even though some 757s are below the 255,000, they are still treated as heavies for wake turbulence separation...
ALL views, opinions expressed are mine ONLY and are NOT representative of those shared by Southwest Airlines Co.
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RE: Heavy Classification?

Fri Mar 22, 2002 9:51 am

This topic comes up WITHOUT FAIL every few months or so... Check the archives.
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RE: Heavy Classification?

Fri Mar 22, 2002 12:12 pm

what is the significance of the heavy designation?
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RE: Heavy Classification?

Fri Mar 22, 2002 4:44 pm

Heavy is added as a designation to warn others that the aircraft is capable of producing moderate to severe wake turbulance. The B757 was added some time ago because of the wake turbulance encountered by following aircraft.
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RE: Heavy Classification?

Fri Mar 22, 2002 8:52 pm

The B757 is considered "heavy" due to the important wake turbulence it makes !!!

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