View Full Version : Responding to a Resolution Advisory

Mr. Green
2nd Jul 2006, 00:00
Do any of you out there know what is the proper (or standard) phraseology one must use towards ATC (be in on HF/VHF) when you are responding to a TCAS RA?

Cheers :ok:

Chesty Morgan
2nd Jul 2006, 00:18
As far as I can recall at the moment.

*Callsign* TCAS Climb/Descent.

*Callsign* TCAS Climb/Descent completed Alt/Fl resumed

*Callsign* TCAS Climb/Descent returning to Alt/FL

*Callsign* Unable to comply, TCAS Resolution Advisory


2nd Jul 2006, 16:30
Did one the other day and my colleague called 'xx123 clear of conflict returning FLXXX' when clear of the conflicting traffic. Don't remember if that is standard or not.:confused:

2nd Jul 2006, 19:34
Verbatim from Cap 413, your options are

“TCAS Climb/Descent”
“Clear of Conflict, returning to FL xxx”

If unable to report it at the time, do it afterwards

“TCAS Climb/Descent, Clear of conflict, FL xxx resumed”

If given a heading but unable

“Unable to comply, TCAS RA”

2nd Jul 2006, 20:13
See the information on TCAS / ACAS from Eurocontrol linked from here Wrong reaction to “Adjust Vertical Speed” RA (www.pprune.org/forums/showthread.php?t=228833)

2nd Jul 2006, 21:25
Does the Adjust Vertical Speed RA still trigger the red visual guidance bars on the PFD? Just wondering what causes the incorrect pilot input in so many cases. I haven't encountered that particular RA as yet!

2nd Jul 2006, 22:34
Guess it depends what you fly.

The 'Bus gives a green area on the VS tape that corresponds to the reduction of climb or descent required.