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Missed Approach 2.5%

Posted: Thu Oct 21, 2010 10:30 am
by smartt1982
My understanding is that in Europe (OPS1) the Missed Approach climb gradient is 2.5% unless otherwise stated that it is higher. On this occasion we have higher MACG in our performance manual that we can check to see if we can accomplish these with our landing weight.

If 2.5% is normal why is it that we have a page for Go-around climb gradient (also called approach Climb Gradient) of 2.1%. It says for One engine out but so do all the other pages for both the 2.5% and the higher MACGs which of course is the important one as the aircraft has no problems on two engines.

Does anyone know the story behind this Go-around climb gradient (also called approach Climb Gradient) of 2.1%

RE: Missed Approach 2.5%

Posted: Thu Oct 21, 2010 12:37 pm
by 411A
2.1% is the net flight path gradient required, whereas 2.5% is the gross requirement.

RE: Missed Approach 2.5%

Posted: Thu Oct 21, 2010 12:56 pm
by smartt1982
Quoting 411A (Reply 1):
2.1% is the net flight path gradient required, whereas 2.5% is the gross requirement

Sorry just me being really simple, but how does the difference work?

RE: Missed Approach 2.5%

Posted: Thu Oct 21, 2010 1:02 pm
by 26point2
Approach Climb gradient is calculated with one engine out in the approach configuration: gear down, approach flaps. FAR's require a minimum gradient of:

2.1% for 2 engine aircraft
2.4% for 3 engine aircraft
2.7% for 4 engine aircraft.

Perhaps 2.5% is a JAR OPS thing? I don't know about JAR OPS.

Landing Climb gradient is calculated in the landing configuration: all engines, gear down, full flaps.

3.2% minimum climb gradient.

FARs require following the most restrictive.