Saturday, May 29, 2010

2006 Mid-Air Collision Brazil - Part 4


Cockpit Voice Recorder

I am going to post on this page the actual cockpit voice recorder recordings.  You can access the YouTube web site to listen to them as well. Click here to listen to N600XL and click here to listen to GOL Transportes Aereos Flight 1907.


I would like to suggest for you to listen to N600XL recording first to gain a sense of how the operation was being conducted.  It contains approximately two hours and 5 minutes  of the flight.  The sound of the actual collision can be heard at 1 hour and 23 minutes and 45 seconds into the recording.  


The crew of N600XL had not talked to Brasilia Air Traffic Control for almost an hour.  Many attempts to regain contact were made however. There was also no attempt to contact other aircraft for assistance on the air to air frequency of 123.45.  


Please note the pilots of the Legacy only use the word "emergency" in all 10 of their transmissions after the collision had happened.  They did not use the International Civil Aviation Organization (ICAO) phraseology standard word "MAYDAY" in any of them.


The fact the none of the authorities involved mentions or acknowledges the deliberate application of randomness in aircraft tracks is shocking to me. I personally have been applying randomness to my aircraft track for more than 50 years. (Once again, see my post on January 26, 2010 "Randomness is good!")


 The application of Strategic Lateral Offset Procedure by either or both crew would have prevented a collision.  The application of randomness in  some form is clearly an option of the Pilots-In-Command that is rarely talked about or applied but may be the last resort to assuring separation in the event of multiple errors or procedural failures.


Do you apply randomness to your aircraft's track? Your  comments please!

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