Re: [SystemSafety] Fwd: Re: Chicago controller halts Delta jet's near-miss....

From: Bernd Sieker < >
Date: Mon, 22 Jun 2015 08:25:46 +0200

Hash: SHA512

On 22.06.2015 07:49, Peter Bernard Ladkin wrote:

> 1. ICAO phraseology and US FAA phraseology are by no means
> identical, although they are similar. I don't seem to have my hand
> on the FAA phraseology handbooks at present, so I can't check.
> [...]
> At a busy airport, I would have expected ATC: "[call sign] Position
> and hold RWY XZ" for both

This is one particular phrase where the FAA has very recently (last year?) adopted the ICAO variant "Line up and wait".

> [...]
> It is important to note that cognitive situations like this happen
> all the time, but almost all of them do not evolve dangerously such
> as this incident. They are also very hard to investigate if they
> do. It is difficult to establish with any reliability who
> understood what when, because people's hindsight into their
> historical cognitive state is not very reliable.

What would probably have helped somewhat were the CVRs, but since the Delta flight left within half an hour, it seems that that is gone.

SouthWest waited for a replacement aircraft, so do we know if it was a high-speed abort, which perhaps required some maintenance checks to be performed?


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