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By KNT754G
#708446
Why on earth not?

Students should be taught correct RTF phraseology throughout their training and a conditional clearance is a mandatory part of the FRTOL practical exam.

Mess that up and you can expect a fail!
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By Moli
#712043
Anon

Another take on it, look at it from the perspective of the landing cessna on final. He has heard you been given a conditional clearance to line up after him. Whilst he is on final, he can see you have rolled thru the N1 hold and are now taxing towards the RW. Is all of his attention now focused on his handling of the aircraft during this critical phase of flight? No, some of it will be on wondering what you are up to.... how can that have anything other than an adverse affect on flight safety?

Moli
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By Rob L
#712338
Here's an interesting report just published by the AAIU (Irish Air Accidents Investigation Unit) about conditional clearances.


The AAIU wrote:An airmiss occurred at Dublin Airport when a helicopter crossed the active runway in front of an aircraft that was taking off. On becoming airborne the Pilot of the Learjet aircraft was forced to take immediate evasive action to avoid a collision. There was little vertical or horizontal separation between the two aircraft at the time of the occurrence. There was no damage to either aircraft.


The Pilot of the helicopter had been given a conditional clearance to cross the runway after the Learjet had taken off. He crossed instead ahead of it and did not see the small Learjet, whose colour was dark grey, until the airmiss. ATC procedures at EIDW have since been changed with conditional clearances to cross active runways no longer being issued to helicopters.