Originally Posted by
chevvron
If I remember correctly, the minimum clearway you can declare is 60m, however this is all some airport operators do declare even when the first significant obstacle is much further from the end of TORA.
Why is this I wonder; airport owner too lazy to get a survey done?
Unfortunately the operators have to use the published figures and I have known this to cause an aircraft to have to depart with a reduced fuel load then make a tech stop to pick up more fuel for the journey, rather than go non-stop.
If an operator has declared 60m its to do with the runway strip where;
Length of runway strips
3.4.2 A strip shall extend before the threshold and beyond the end of the runway or stopway for a distance of at least:
— 60 m where the code number is 2, 3 or 4;
— 60 m where the code number is 1 and the runway is an instrument one; and
— 30 m where the code number is 1 and the runway is a non-instrument one.
A clearway has to be under the control of the airport operator, so if there is anything outside the strip that is under the control of the adjacent land owner then the airport cant declare this, even if obstacle free.
But then most runways require a RESA
3.5.1 A runway end safety area shall be provided at each end of a runway strip where:
— the code number is 3 or 4; and
— the code number is 1 or 2 and the runway is an instrument one.
Annex 14 says objects in the strip should as far as practical be removed. So I guess if the adjacent land owner doesn't remove his objects then they can't be forced to.