Originally Posted by
737Andi
So in case of a single engine failure during takeoff roll with an A320 I would need to keep the altitudes 350feet + 1640feet (engine out altitude) = 1990 feet and 350feet + 3000 feet (altitude for start of open climb) = 3350 feet in mind before each start, since 1640 feet and 3000 feet are company specific preset values for engine out procedure?
In the case of an engine failure in an A320 the acceleration altitude is an altitude and therefore does not need to be corrected for the elevation of the airport. 1640 is quite a specific figure so it probably relates to a specific airport. Where did you get that number?
In addition, the acceleration altitude is a minimum. You have to be at or above that altitude and you also need to have the engine secured and have completed any initial turns in the procedure. Open climb doesn't happen at an altitude, it happens at a speed. At (or above) the acceleration altitude, you select VS 0 (push to level off), retract flaps on schedule, then as you get to green dot speed you pull for open climb and set the thrust to MCT.
In summary: For an A320 the engine out altitude is given by the take-off performance calculation and may be different for every take-off. It is an altitude and does not need the airport elevation added (take-off performance has already done that for you). You pull for open climb when you reach green dot speed, not an altitude, so you don't need to make any adjustments there either.
Hope that helps.