Information released regarding Brazilian mid-air collision

http://ntsb.gov/Pressrel/2006/061122a.htm

The AOPA and Cong King [Republican] have asked the State
Department to get the American pilots released, at least
until after the civil investigation is completed.

IMHO, preliminary reports make it sound like a Brazilian
government screw-up with their communications network.



"M" wrote in message
ps.com...
|
|
| http://ntsb.gov/Pressrel/2006/061122a.htm
|

The big question is what happened to the transponder on the Embraer.

Mike Schumann

"Jim Macklin" wrote in message
...
The AOPA and Cong King [Republican] have asked the State
Department to get the American pilots released, at least
until after the civil investigation is completed.

IMHO, preliminary reports make it sound like a Brazilian
government screw-up with their communications network.



"M" wrote in message
ps.com...
|
|
| http://ntsb.gov/Pressrel/2006/061122a.htm
|

Mike,

The big question is what happened to the transponder on the Embraer.


Why? There are exactly zero reports on a transponder malfunction.

--
Thomas Borchert (EDDH)

Mike Schumann wrote:
The big question is what happened to the transponder on the Embraer.

My guess, NOTHING.

The report says ATC had intermittent to missing PRIMARY returns
as well. PRIMARY returns are the skin paint from the radar. It
would seem that Brazillian RADAR just sucks badly. Nothing you
can do with the transponder will kill the primary return.

And a transponder just sits there unless it is triggered by
the secondary radar. If the ground based radar is inop or
intermittent, the transponder just does nothing.


"Ron Natalie" wrote in message
m...
| Mike Schumann wrote:
| The big question is what happened to the transponder on
the Embraer.
|
| My guess, NOTHING.
|
| The report says ATC had intermittent to missing PRIMARY
returns
| as well. PRIMARY returns are the skin paint from the
radar. It
| would seem that Brazillian RADAR just sucks badly.
Nothing you
| can do with the transponder will kill the primary return.

Jim Macklin wrote:
And a transponder just sits there unless it is triggered by
the secondary radar. If the ground based radar is inop or
intermittent, the transponder just does nothing.

....or it's triggered by another TCAS unit. TCAS goes around
probing transponders independently of the ground facilities.

True, was either airplane so equipped?



"Ron Natalie" wrote in message
m...
| Jim Macklin wrote:
| And a transponder just sits there unless it is triggered
by
| the secondary radar. If the ground based radar is inop
or
| intermittent, the transponder just does nothing.
|
| ...or it's triggered by another TCAS unit. TCAS goes
around
| probing transponders independently of the ground
facilities.