ATC Watch:
read the Fohla on line article of last monday (15 Oct) on this issue, very, very interesting
Folha:
Of four frequencys that Legacy’s pilots could have used, two were unavailable to controllers and one not operational.
(…)
Complete transcriptions of radio conversation between ATC and aircrafts in accident region, obtained and analyzed by Folha, also prove that Cindacta-1 received and ignored at least three calls of Legacy before collision .
This is not new and was mentioned by leaked report of CENIPA, as:
19:48:13s to 19:52:07s (
three minutes before collision): the Legacy tried
twelve times, always without success and always using different frequencies, to make contact with Sector 7 of ACC-Brasilia, according to the following list:
19:48:13 to 19:49:30: 3 attempts - Frequency: Unknown
19:50:09 to 19:50:27: 2 attempts - Frequency: 123.30 Mhz
19:50:45 to 19:51:21: 3 attempts - Frequency: Unknown
19:51:42 : 1 attempt - Frequency: 133.05 Mhz
19:52:07 to 19:52:56 - Frequency: Unknown
In the previous list, the frequencies, when determined, signify communications that were received by ACC-Brasilia, but were not heard by the controller responsible for Sector 7, since these frequencies were not programmed on his console. The information registered as unknowns were not received by ACC-Brasilia, having been collected from their appearance on the Legacy’s CVR.
Folha:
The frequencies that must be used, indicated in the aeronautical chart for that sector, are: 123.30 Mhz, 128.00 Mhz, 133.05 and 135.90. Each sector has its own list. Pilots should be informed by Cindacta which of them they should use (Neither they nor any other pilot in any part of the world needs controllers to know at what frequencies they should position their communications apparatus. The navigation charts register the frequencies sector by sector – Agestado), whereas controllers listen and transmit on until six simultaneous frequencies in their consoles (workstation). At September, 29 of 2006, however sector 7 controllers had only frequency 135,90 Mhz available. The other five were of sectors 8 and 9, that they were watching that day
Sorry, but what is the new here? Sectors 8 and 9 are much more crowded, so if controllers allocate just one frequency for sector 7, always will have just one frequency operational.
And Folha conclusion:
These revelations don’t exempt responsibility of controllers for proved failures raised in investigations: to clear a collision altitude for the jet, to neglect surveillance of Legacy and don’t put in action foresaw lost communication procedures that could avoid the accident. Not even remove the responsibilities of pilots Joseph Lepore and Jan Paladino for flying with transponder (equipment that feeds anti-collision system) turned off.
lomapaseo:
For those of us interested in continued flying with our families we are consoled by the technical understanding, the lessons learned and the adoption of the recommendations that follow.
I respect that.
I think that all of us, Brazilians and you, understood what happened. We are only worried about some facts, as the mess of our airspace, our safety issues, that are being published by blogs and forums, althought be true, but are not cause of this accident, but just intended to baffle us and you.