V-Flyer

Just reading about a near miss with two 747s on the 29th Sep. Apparently the Aerolineas Argentinas 747 was so close the BA collision alarm sounded the command "climb, climb, climb"

So, how close do planes have to get for this to happen?

Originally posted by locutus
Just reading about a near miss with two 747s on the 29th Sep. Apparently the Aerolineas Argentinas 747 was so close the BA collision alarm sounded the command "climb, climb, climb"

So, how close do planes have to get for this to happen?

Where did you read this?[?]

I would have thought you would have had a response by now?[:w]

Sorry, missed this thread [B)]

It was between a BA 744 and an AR 343 over Southern France. This happened on Sept 29th and has been kept amazingly quiet.

Link to story

Daily Mail article - surprisingly the incident wasn't blamed on migrant workers or asylum seekers[:w]

Still interested to know how close the a/c were.

45.

Well they did blame the French... [:w] Next thing you know someone will say they saw a white Fiat Uno.

GJ

And a flash gun dazzled the pilots of the A340!![}:)]




Hopefully the French controller has been sacked.[^][:w]

And a full and public shake up of the ATC over France sorted out?[:?] Doubt that we will ever find out though.[?]

Well done to the BA crew.[y][oo][^]

You know what they say, if its in The Mail "it must be true"!

Well done to the BA crew

Isn't the reason for most collisions because the crew decided they know best? As long as you do what TCAS tells you, the risk is normally avoided.

I did a quick internet search...

TCAS equipment scans airspace 15 miles to the front of the aircraft and 7.5 miles to the rear every second.

So they were within 15 miles of each other I guess. Sorry for answering my own question! [:I]

I would expect it was less than 15 miles though as a/c can be spaced within 5 miles of each other horizotally without TCAS going off IIRC.

45.

Oh gosh you are making my think at 6AM on a Sunday. I guess my 4.5 years at MTSU may pay off, sort of.

There are two types of alerts; TA and RA.

TA - Traffic Advisory's just that, that only tell the pilot that there is a plane near by (noramlly within 5 miles in the enroute enviroment and 2 miles in the terminal). (TCAS I and higher feature)

RA - Resolution Advisory's tell the pilot that there is an aircraft nearby and suggest a course of action. Following a RA is a valid reason to leave an assigned position (altitude, heading, course, etc.). There are may types for RAs but that is the basic jist. (TCAS II and III feature)

All airlines are requires to have TCAS II or higher if they operate a plane over 33,000 lbs with more than 30 folks.

There are two types of alerts; TA and RA.

TA - Traffic Advisory's just that, that only tell the pilot that there is a plane near by (noramlly within 5 miles in the enroute enviroment and 2 miles in the terminal). (TCAS I and higher feature)

RA - Resolution Advisory's tell the pilot that there is an aircraft nearby and suggest a course of action. Following a RA is a valid reason to leave an assigned position (altitude, heading, course, etc.). There are may types for RAs but that is the basic jist. (TCAS II and III feature)

All airlines are requires to have TCAS II or higher if they operate a plane over 33,000 lbs with more than 30 folks.

Using the scenario of what happened over France, the BA a/c leaves his FL390 rather rapidly, he could then be in conflict with another A/c?[:0]
Does the TCAS scan above and below as well?[?]
And how would the aircraft dirctley above know the BA aircraft was taking immediate evasive action?[?]

Hope you understand what I am trying to ask?[?]

Thanks