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Bruce
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Aircraft Type Codes

Sat Oct 29, 2005 11:59 pm

Sometimes I see aircraft types listed with a letter at the end. What do these letters mean? Some examples: B752/J, DC10/W, B753/Q, CRJ2/K, GLF4/Q, B744/Q

And then there is letters before AND after: H/MD10/J


Bruce
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OPNLguy
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RE: Aircraft Type Codes

Sun Oct 30, 2005 3:13 am

The H/ prefix is to denote to the ATC folks that the aircraft is a "heavy" for wake turbulence purposes, and increase separation for any aircraft behind it. The B744 and B753 should also carry this, although the B752 may or may not, depending upon if it's a high-weight version that puts it over the 255,000 lb threshold for the "heavy" designation. It's a moot point, in a sense, since ATC (here in USA, can speak for elsewhere) treats -all- 757s as if they were "heavy" for wake. turbulence separation purposes.

The various /Q suffix and other examples tell ATC what kind of nav equipment the aircraft has onboard. A new table went into effect on 9/1/2005:

http://www.gofir.com/general/rvsm/aircraft_equipment_suffix.htm

[Edited 2005-10-29 20:15:48]
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Goldenshield
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RE: Aircraft Type Codes

Sun Oct 30, 2005 4:02 am

We still file with T/, even though I've heard from various FSS people that it is no longer required. I'm not sure on their reasoning on this, but I comply, so whenever I have to manually file a flight, I just drop the T/.
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Bruce
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RE: Aircraft Type Codes

Mon Oct 31, 2005 2:03 am

Ahhh...now it makes sense, seeing that list!

so a /W means a plane is authorized for RVSM airspace even though it does not have advanced RNAV, but a /J would mean that is is authorized for RVSM operation AND can do procedures that require DME?

bruce
Bruce Leibowitz - Jackson, MS (KJAN) - Canon 50D/100-400L IS lens
 
Goldenshield
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RE: Aircraft Type Codes

Mon Oct 31, 2005 2:35 am

Quoting Bruce (Reply 3):
but a /J would mean that is is authorized for RVSM operation AND can do procedures that require DME?

With /J, the FMS is updated by an IRU, and is supplemented by DME range from ground based navaids.

DME ranging needs two or more DME signals from either VORTACs or TACANs to get a position.

/K is FMS using DME ranging, but without an IRU.
/L is FMS using GPS ranging, but is backed up by DME.

All of the above can do RVSM.
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