approach climb 2.1% vs MACG 2.5% or greater

[wof]

Originally Posted by Noknoipobin

The approach can definitely be performed because:

1. The GA climb gradient used in the calculation is based on one engine inoperative (for a two-engine aircraft). However, during a normal approach we have both engines operating. You can also notice that the landing climb gradient is already quite high; therefore, if we perform a go-around with both engines, the climb performance would be even better.

As far as I understand, the GA climb gradient is indeed based on one engine inoperative. However, I think the fact that both engines are normally operating during the approach is not really considered in the performance calculations.

My understanding is that all landing climb limits (approach climb and landing climb) are evaluated assuming OEI. For example, in the Overweight landing NNC, the crew is asked to check the approach climb/landing climb limited weights to determine the flap setting, even though both engines are actually operating.

Originally Posted by Noknoipobin

2. Even if we were left with only one engine and attempted the approach, I think it could still be done (no better choice) , but we might not be able to follow the published missed approach procedure. In that case, we would need another option if a go-around is required, such as following an engine-out SID or another suitable procedure.

I may be mistaken, but I thought the aircraft must be able to meet the missed approach gradient OEI at the landing weight. Do you happen to have a reference for the statement that the approach could still be performed if that gradient cannot be met?

Thanks