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Air Canada Planes At Pearson Airport Nearly Crashed Into Each Other During Takeoff
Air transportation safety investigation report A20O0029 (www.tsb.gc.ca) More...
Two aircraft, on the same frequency?? Not a good idea.. ever…
It appears that there was quite a bit of traffic which makes me wonder if there should have been more than 4 people covering the 9 tower positions.
From my experience and unless things have changed dramatically, the airport movements tend to slow down mid morning and even so YYZ ATC has a pretty darn good handle on manning the positions. 06L is not that far away from the tower viewpoint of observing traffic nor is the lift off point for most departing aircraft, at least those flying domestically. I prefer to think in the absence of any other findings that it was a case of being less vigilant and more human.
Big red flag on the Honeywell Monitoring Warning function - MWF. DO-181 MOPS (Build Standards- not recommendations as stated) should use inputs from the ADC's AND the 2 Weight on Wheels sensors... which was obviously not the case. Another booby-trap is setting the MWF speed threshold to 50kts (ERJ) and 100kts (B777) as the basis for the MWF to transmit an
in-air' status. Long story short, if this design flaw were to happen with a Motor car, the vehicle would be recalled. Will Honeywell reconfigure its MWF and in turn the OEMs take on the re-certification requirements? Meanwhile, the Controller will bear the brunt of what and why things ended up this way!
in-air' status. Long story short, if this design flaw were to happen with a Motor car, the vehicle would be recalled. Will Honeywell reconfigure its MWF and in turn the OEMs take on the re-certification requirements? Meanwhile, the Controller will bear the brunt of what and why things ended up this way!
