Originally Posted by Michelda
During go around, you have to maintain a gradient of 2,5%, but is not reported until which altitude you have to maintain it. It means, in my idea, that you have to maintain it until the first altitude.
ICAO Doc 8168 can give you some pointers about this.
To make it short: in any Missed Approach area construction, it is assumed that the acceleration segment may commence at the end of the intermediate phase of the missed approach. It is actually not very simple for pilots to identify that phase but it usually matches the major turn altitude (if any...) in the missed approach proc.
So if your MA Proc specify a turn of more than 15° at a certain altitude, you may accelerate at this altitude without problem, you are protected.
If your MA proc is a straight track...well in that case, it is hard to guess where your acc segment may start.
On some particular airports, acc segment altitudes are clearly defined in the MA briefing strip.
Bear in mind that your aircraft is certified to climb at 2.5% during G/A with OEI. If the runway requires more than 2.5%, performance penalty may apply, then LPC is your friend!