A4 is absolutely right. All Flex takeoffs take into account an engine failure at V1 and ensure that all obstacles will be cleared at that power setting. Selecting TOGA will of course increase the safety margin and is a good idea. For airports that require a steeper climb gradient than can be met at that Flex setting the airline must produce Engine Out (EO) escape routes. The relevant authorities have to approve them but the ATC may not know them as they may vary airline by airline. Therefore, if you have to fly one, you should advise ATC of the failure and exactly what routing your are going to follow in order for them to clear the airspace for you.
I cannot comment on the OAKB scenario as I am not familiar with it but the company may have found something that precluded them from going for the suggested option over the city etc. such as another obstacle further up BAG valley.
Last edited by Fly3; 27th Jul 2013 at 02:42.